Category: Powder Coat Guide

Do you have powder coating questions about powder coating equipment,powder application,powder material?Do you have any doubt about your powder coat project, here a complete powder coat guide may help you find the satisfactory answer or solution.

 

How to Prevent Powder Coating Caking

Powder Coating Caking

How to prevent powder coating caking Different resins having different glass transition temperatures , such as epoxy and polyester resin has a glass transition temperature of about 50 degrees Celsius, lightening agent ( 701 ) has a glass transition temperature of about 30 degrees Celsius, the liquid leveling agent in minus degrees Celsius. The larger the amount of material with low glass transition temperature the powder coating formulations contain ,the lower the glass transition temperature will become .Glass transition temperatureRead More …

Munsell Color Chart, Munsell Catalogue

Munsell Color Chart, Munsell Catalogue

Sublimation Transfer Process

Sublimation Transfer Process

In order to apply the Sublimation Transfer Process , the following equipment and materials are required . A Special transfer equipment A Special sublimation powder coating to be sprayed and cured in a Coating Unit. Heat Transfer Paper or Film ( paper or plastic film carrying the desired effect printed with special sublimation inks. Working Process 1.Coating process: Using a sublimation powder coating,coating process in a standard coating unit consists of three different steps: pretreatment ,spraying powder,curing.The coating layer worksRead More …

Munsell Color System Description

Munsell Color System Description The Munsell color system was first established by the American painter and art teacher Albert H. Munsell around 1900, so it was named “Munsell color system”. The Munsell color system consists of five basic colors—red (R), yellow (Y), green (G), blue (B), and purple (P), plus five intermediate colors—yellow-red (YR). ), yellow-green (YG), blue-green (BG), blue-violet (BP), and red-violet (RP) as a reference. Each hue is subdivided into four colors, represented by the numbers 2.5, 5,Read More …

Why and How To Recoat Powder Coating

Recoat powde coating

Recoat Powder Coating Applying a second coat of powder is the common approach to repair and reclaim rejected parts. However, the defect should be carefully analyzed and the source corrected before recoating. Do not recoat if the reject is caused from a fabrication defect, poor quality substrate, poor cleaning or pretreatment, or when the thickness of two coats together will be out of tolerance. Also, if the part is rejected due to undercure, it merely needs to be rebaked atRead More …

Plastic Terminology – English abbreviation AND full English name

Plastic Terminology

Plastic Terminology – English abbreviation AND full English name Abbreviation Full Name AAS Acrylonitrile-Bcry ate-styrene    opolymer ABS Acrylonitrile-butadiene-styrene  ALK Alkyd resin AMMA Acrylonitrile-methylmethacrylate copolymer AMS Alpha methyl styrene AS Acrylonitrile-styrene copolymer(see SAN) ASA Acrylonitrile styrene-acrylate copolymer(AAS) BMC Bulk moulding compound CA Cellulose acetate CAB Cellulose acetate butyrate CAP Cellulose acetate propionate CF Casein formaldehyde resin CFE Polychlorotrfluoroethylene(see PCTFE) CM Chlorinated polyethylene(see CPE) CMC Carboxymethyl cellulose CN Cellulose nitrate COPE Polyether ester elastomer CP Cellulose propionate(CAP) CPE Chlorinated polyethylene(PE-C) CPVC Chlorinated polyvinyl Chloride(PVC-C) CS Casein plastics CSM &cspr Chorosulfonated polyethylene CTA Cellulose triacetate DMC Dough moulding tompound E/P Ethylene propylene copolymer CA-MPR Elastomer alloy melt processable rubber EA-TPV Elastomer alloy thermoplastic vulcanizate EC Ethylene cellulose EEA Ethylene ethylacrylate copolymer EP Epoxide or epoxy(cured) EPDM Ethylene propylene diene terpolymer EPS Expandable polystyrene ETFE Ethylene/tetrafluoroethylene EVA Ethylene vinyl accetate copolymerRead More …

Eliminating Orange Peel During Powder Coating

Eliminating Orange Peel

Achieving the right amount of electrostatic powder paint on the part is very important for durability reasons as well as eliminating orange peel. If you spray too little powder on the part, you will most likely end up with a grainy texture to the powder also known as “tight orange peel.” This is because there was not enough powder on the part for it to flow-out and create a uniform coating. Besides the poor aesthetics of this, the part willRead More …

Pantone PMS Colors Chart Used For Printing and Powder Coating

Pantone® Matching System Color Chart PMS Colors Used For Printing Use this guide to assist your color selection and specification process. This chart is a reference guide only. Pantone colors on computer screens may vary based on the graphics card and monitor used in your system. For true accuracy use the Pantone Color Publication.

What is Powder Coating Process

powder coating process

Powder Coating Process Pre-treatment – drying to remove water – spraying – Check – baking – check – Finished. 1.The characteristics of the powder coating can give full play to extend the coating life to break the painted surface first strictly surface pre-treatment. 2.Spray, was painted to be fully grounded in order to increase the efficiency of the powder coating of puffing. 3.The larger surface defects to be painted, coated scratch conductive putty, in order to ensure the formation ofRead More …

Solution of Poor Mechanical Properties and Chemical Resistance

polyester coating degradation

1.Poor Mechanical Properties and Chemical Resistance Cause: Too high or Too low curing temperature or timeSolution: Confirm and check with powder coating supplierCause:Oil,grease,extrusion oils,dust on the surfaceSolution:Optimize pretreatmentCause:Differing materials and material colorsSolution:Insufficient pretreatmentCause:Incompatible pretreatment and powder coatingSolution:Adjust pretreatment method,consult powder supplier 2.Greasy Surface(Haze like film on the surface which can be wiped off) Cause: Blooming effect-white film on the powder surface,which can be wiped offSolution:Change powder coating formula,increase curing temperatureCause: Insufficient air circulation in the ovenSolution:Increase air circulationCause: Contamination on theRead More …

Conversion Coating of Galvanized Steel

Conversion Coating of Galvanized Steel

Iron phosphates or cleaner-coater products produce little or non-detectable conversion coatings on zinc surfaces. Many multimetal finishing lines use modified iron phosphates which offer cleaning, and leave micro-chemical etch on zinc substrates to provide adhesion properties. Many municipalities and states now have limits on zinc PPMs, forcing metal finishers to provide treatment of any solutions in which zinc substrates are processed. The zinc phosphate conversion coating is, perhaps, the highest quality coating that can be produced on a galvanized surface. ToRead More …

Corona and tribo charging technology

Understanding the differences between corona and tribo charging, assists in deciding which technology is best for an application. Each type of charging has typically been used for specific industries. Tribo charging has typically been used in industries which require epoxy powder or products that have intricate shapes. Insulating products such as electrical equipment that only require protective coating are prime users of tribo charging guns. This protective coating is generally;epoxy due to its tough finish. Also, industries such as wireRead More …

Necessary laboratory equipment for testing powder coating in application

LABORATORY EQUIPMENT Equipment necessary for testing the pre-treatment chemicals, rinsing water and final results Tests of pre-treatment chemicals to be performed according to suppliers’ instructions Conductivity measurement gauge for evaluation of final rinse Temperature recorder Coating weight equipment, DIN 50939 or equal Equipment necessary for testing the powder coating Film thickness gauge suitable for use on aluminum (e.g. ISO 2360, DIN 50984) Cross hatch equipment, DIN-EN ISO 2409 – 2mm Bending test equipment, DIN-EN ISO 1519 Indentation test equipment, DIN-ENRead More …

Testing Methods for Powder Coating Application Process

TESTING METHODS FOR POWDER COATING

TESTING METHODS FOR POWDER COATING Testing methods are designed for two purposes: 1. Performance reliability ; 2. Quality control (1)  GLOSS TEST (ASTM D523) Test coated flat panel with Gardener 60 degree meter.  Coating shall not vary  + or – 5% from data sheet requirements on each material supplied. (2)  BENDING TEST (ASTM D522) Coating on .036 inch thick phosphated steel panel shall withstand 180 degree bend over 1/4″ mandrel.  No crazing or loss of adhesion and finish at the bend beRead More …

Definitions for corrosion classification

Natural Weathering Test

As an aid in finding what requirements should be made for pre-treatment, we can define different corrosion classification: Corrosion Class 0 Indoors with relative humidity over 60% Very little corrosion risk (aggressivity) CORROSION CLASS 1 Indoors in non-heated, well ventilated room Little corrosion risk (aggressivity) Corrosion Class 2 Indoors with fluctuating temperature and humidity. Outdoors in inland climates, far from sea and industry. Medium corrosion risk (aggressivity) CORROSION CLASS 3 In densely populated areas or near industrial areas. Above open waterRead More …

Powder Coating Storage And Handling

Powder Coating Storage And Handling

Powder Coating Storage And Handling Powder, like any coating material must be shipped, inventoried, and handled in its journey from the powder coating manufacturer to the point of application. Manufacturers’ recommendations, procedures, and cautions should be followed. Although various powders may have specific requirements, some universal rules apply. It is important that powders should always be: Protected from excess heat; Protected from humidity and water; Protected from contamination with foreign materials, such as other powders, dust, dirt, etc. These areRead More …

Methods of Applying Powder – ELECTROSTATIC SPRAYING

Equipment for Powder Manufacture

Electrostatic spraying is the most widely used method of applying powder coating materials. Its growth is increasing at an impressive rate. Developed in the mid 60’s , this process is the most efficient means of applying coatings and finishes in a short time. However, acceptance of powder coating in general was initially very slow in the US. In Europe, the electrostatic powder spray concept was accepted more readily, and the technology moved much faster there than else-where in the world.Read More …

Quality Control of Powder Coating

Paint over powder coat - How to paint over powder coat

Quality Control Of Powder Coating Quality control in the finishing industry requires attention to more than just coating. In fact, the majority of problems occur for reasons other than coating faults. To assure quality where coating may be a factor, statistical process control (SPC) can be a useful tool. SPC SPC involves measuring the powder coating process using statistical methods and improving it to reduce variation at desired process levels. SPC can also help determine the difference between typical variationRead More …

Electrostatic Spray Corona charging the most common method

Electrostatic Spray Corona charging

Electrostatic Spray (Corona charging) is the most common method used in powder coating .The process disperses finely ground powder into corona field at the gun tip applying a strong negative charge to each particle. These particles have a strong attraction to the grounded part and deposit there. This process can apply coatings between 20um-245um in thickness. Corona charging can be used for decorative as well as functional coatings. Virtually all resins with the exception of nylon can be applied easilyRead More …

Safe Storage Of Powder Coating

powder coating packing- dopowder.com

Proper storage for powder coating prevents particle agglomeration and reaction advancement, and ensures satisfactory application,this is pivotal. During application powder coatings must be easily fluidizable, free-flowing, and capable of accepting and maintaining a good electrostatic charges. Factors affecting powder coatings storage The key factors affecting powder coatings storage can be identified as: Temperature Moisture / Humidity Contamination Direct sunlight The recommended optimum conditions for storage of powder coating are: Temperature < 25°C Relative humidity 50 – 65% Away from directRead More …

How to Wipe Out Orange Peel During Electrostatic Powder Painting

powder coating powder paint Orange Peel

Achieving the right amount of electrostatic powder paint on the part is very important for durability reasons as well as eliminating orange peel. If you spray too little powder on the part, you will most likely end up with a grainy texture to the powder also known as “tight orange peel.” This is because there was not enough powder on the part for it to flow-out and create a uniform coating. Besides the poor aesthetics of this, the part willRead More …

Some Points to Know the Quality of The Powder Coating Powders

epoxy powder coating powder

Exterior Appearance Identification: 1. Hand Feel: Should feel silky smooth,loose, floating, the more smooth loose of the powder, the better of the quality, on the contrary, powder feel rough and heavy, poor quality, not Easy spraying, powder falling twice more wastage. 2.Volume: The larger of the volume, the less filler of the powder coatings, the higher of the cost, the better the quality of the coating powders. On the contrary , the smaller of the volume, the higher content ofRead More …

What is Electrostatic Painting Process

Electrostatic Painting Process

Electrostatic painting is a process in which a spray gun tip is electrostatically charged; making the paint charged electrically; thereby allowing the paint to be attracted to a grounded surface. This process wastes almost no paint through normal air flow, wind, or dripping. This is because the paint particles are actually attracted to the surface you are painting like a magnet. However, in order for the process to work the object you are painting has to be grounded. Electrostatic sprayingRead More …

How To Evaluate Coating Adhesion-Tape Test

Tape Test

By far the most prevalent test for evaluating coating adhesion is the tape-and-peel test, which has been used since the 1930’s. In its simplest version a piece of adhesive tape is pressed against the paint film and the resistance to and degree of film removal observed when the tape is pulled off. Since an intact film with appreciable adhesion is frequently not removed at all, the severity of the test is usually enhanced by cutting into the film a figureRead More …

Elimination of the effects caused by outgassing in powder coating

How to Eliminate the Effects of Outgassing In Powder Coating

How to Eliminate the Effects of Outgassing In Powder Coating There are some different methods that have been proven to eliminate this problem: 1. Preheating the Part: This method is the most popular to eliminate the problem of outgassing. The part to be coated is preheated above the cure temperature for at least the same amount of time to cure the powder to allow the entrapped gas to be released prior to applying the powder coating. This solution may notRead More …

How To Maintain The Spray Equipment

powder coating application equipment

You should ensure that the plant and spray equipment used in spray painting or powder coating activities is well maintained, operational and clean. This includes: regular visual checks of equipment and plant, including engineering controls and ventilation systems regular monitoring and testing of ventilation flow rates regular servicing of all equipment and plant procedures for reporting and repairing faulty equipment records of servicing, maintenance, repair and testing of plant and equipment should be kept for future reference. When undertaking maintenanceRead More …

What is the Conditions for Dust Explosions

Dust Explosions

During powder coating application , the conditions for dust explosions must be paid attention highly to avoid any problem occur .A number of conditions must exist simultaneously for a dust explosion to occur. The dust must be combustible (as far as dust clouds are concerned, the terms “combustible”, “flammable” and “explosible” all have the same meaning and could be used interchangeably). The dust must be dispersed (forming a cloud in air). The dust concentration must be within the explosible rangeRead More …

What is Economic Advantages of Powder Coating

advantages of powder coatings

Energy and labor cost reduction, high operating efficiencies, and environmental safety are advantages of powder coating that attract more and more finishers. Great cost savings can be found in each of these areas. When compared with a liquid coating system, a powder coating system has several obvious significant economic advantages. There are also many advantages that may not appear significant by themselves but, when collectively considered, contribute substantial cost savings. Although this chapter will try to cover all cost advantagesRead More …

Maintenance of metallic effect powder coating

powder coating colors

How to maintain metallic effect powder coating Metallic effects arise through light reflection, absorption and mirror effect of the metallic effect pigments contained in the paint. These metallic powders can be used in both exterior and interior environments. The cleanability and suitability of the powder,for an environment or end use, starts with the colour selection process. In certain instances the powder manufacturer may propose the application of a suitable clear topcoat.The cleaning of metallic effect powder coated surfaces is inRead More …

Faraday Cage In Powder Coating application

Faraday Cage In Powder Coating

Let’s start looking at what happens in the space between the spraying gun and part during the electrostatic powder coating application procedure. In Figure 1, the high potential voltage applied to the tip of the gun’s charging electrode creates an electric field (shown by red lines) between the gun and grounded part. This bring about the development of corona discharge. A great amount of free ions generated by the corona discharge fills the space between the gun and the part.Read More …

How to Powder Coat Aluminum – Aluminum Powder Coating

powder-coat-aluminum

Powder Coat AluminumComparing with conventional paint,powder coating is much more durable and is commonly applied on substrate parts that will be long term exposed to tough environments.That maybe worthwhile to DIY if there are lots of aluminum parts around you required for powder coating.It is no more difficult to buy a powder coating gun on your market than spraying paint . Instructions 1.Clean the part completely,removing off any paint,dirt or oil .Make sure that any components not to be coated (such as O-rings or seals) have been removed. 2.Mask any area of the part not be coated using high-temperature tape. For blocking off holes, purchase reusable silicone plugs that press into the hole.Mask large areas by taping on a piece of aluminum foil. 3.Set the part on a wire rack or hang it from a metal hook.Fill the gun’s powder container with powder no more than 1/3 full.Connect the gun’s ground clip to the rack. 4.Spray the part with powder, coating it evenly and completely.For most parts, only one coat will be necessary. 5.Preheat the oven to bake.Insert the part into the oven being careful not to bump the part or touch the coating.Consult the documentation for your coating powder about necessary temperature and curing time. 6.Remove the part from the oven and let it cool. Remove any masking tape or plugs. Notes:Make sure the gun is plugged into a properly grounded outlet.The gun cannot work without a ground connection. For more detals about powder coat aluminum process,please feel freeRead More …

Spray process and requirements for general and art powder coatings

Differences-Between-Tribo-and-Corona

The so-called Powder coating is the use of the principle of the electric field of high voltage electrostatic corona. Connected to the high-voltage anode metal deflector standard on the gun head, spraying the workpiece ground formation of the positive, so that the formation of a strong static electric field between the gun and the workpiece. When the compressed air as a carrier gas, the barrel of powder coatings for the powder sent the pollen tube to spray gun deflector rod,Read More …

The particularity and storage of powder coatings

Powder Coating Storage And Handling

Storage of Powder Coatings The powder coating is a new type of solvent-free 100% solid powder coating. It has two categories: the thermoplastic powder coating and thermosetting powder coating. Coating made of special resin, fillers, curing agents and other additives, to a certain proportion of mixed and then by hot extrusion and crushing process of sifting and other prepared from. At room temperature, storage stability, electrostatic spray or fluidized bed dipping, and then the baking heat of melting and solidification,Read More …

ASTM D3359-02-TEST METHOD A-X-CUT TAPE TEST

ASTM D3359-02-TEST METHOD A-X-CUT TAPE TEST

ASTM D3359-02-TEST METHOD A-X-CUT TAPE TEST 5. Apparatus and Materials 5.1 Cutting Tool—Sharp razor blade, scalpel, knife or other cutting devices. It is of particular importance that the cutting edges be in good condition. 5.2 Cutting Guide—Steel or other hard metal straightedge to ensure straight cuts. 5.3 Tape—25-mm (1.0-in.) wide semitransparent pressure sensitive tape7 with an adhesion strength agreed upon by the supplier and the user is needed. Because of the variability in adhesion strength from batch-to-batch and with time,Read More …

Testing of Powder Coatings

testing of powder coatings

Testing of Powder Coatings Surface Characteristics Test Method Procedure (s) Primary Test Equipment Surface Characteristics     Smoothness PCI # 20 Smoothness Standards Gloss ASTM D523 Glossmeter Color ASTM D2244 Colorimeter Distinctness of Image   Visual Observations Contrast Ratio PCI #3 Special Substrates,   ASTM D2805 Reflectance Instruments Physical Characteristics Physical Test Primary Test Equipment Characteristics Procedure (s)   Film Thickness ASTM D 1186 Magnetic Film Thick Gauge,   ASTM D1400 Eddy Current Induce Gauge Impact ASTM D2794 Impact Tester Flexibility ASTM D522 Conical or Cylindrical Mandrel Adhesion ASTM 2197 Balanced-Beam Scrape-Adhesion,   ASTM D3359 Cross Hatch Cutting Device and Tape Hardness ASTM D3363 Calibrated Drawing Leads or Pencils Abrasion Resistance ASTM D4060 Taber Abrader and Abrasive Wheels   ASTM D968   Edge Coverage ASTM 296 Standard Substrate and Micrometer Chip Resistance ASTM D3170 Gravelometer   Test Method Procedure(s) Primary Test Equipment Environmental Characteristics     Solvent Resistance   MEK or other Stain ResistanceRead More …

Powder coating orange peels appearance

Powder coating orange peels

Powder coating orange peels appearance From shape visually or using mechanical methods of measurement shows instrument or via a bellows scan to assess and compare the powder coating orange peel appearance. (1) visual method In this test, the model of the double tube fluorescent. A model of reflective light source can be obtained by appropriately placed boilerplate. Qualitative analysis of the clarity of the reflected light from the visual assessment of the nature of the flow and leveling. In theRead More …

Coating forming process

Coating forming process

Coating-forming process can be divided into melt coalescence to form a coating film leveling three stages. At a given temperature, the control molten coalescence rate the most important factor is the melting point of the resin, the viscosity of the molten state of the powder particles and the size of the powder particles. In order to best coalescence of molten shall as soon as possible, in order to have a longer time to complete the leveling phase flow effects. TheRead More …

How It Works-Tribo Charging Method

The charging of the powder particles in a tribo gun is achieved by the friction of two dissimilar materials coming in contact with one another. (See diagram #2.) In the case of most tribo guns,electrons are stripped from the powder particles as they make contact with the gun wall or tube which is typically made of teflon. This results in the particle giving up electrons which leaves it with a net positive charge. The positively charged powder particle is transportedRead More …

Corona Charging Method-How It Works

Electrostatic Spray Systems

In corona charging, a high voltage potential is developed at an electrode located in or near the powder stream. With most corona guns this occurs as the powder exits the gun. (See diagram #l.) An ion field is generated between the electrode and the grounded product. Powder particles passing through this field are bombarded with ions, become charged, and are attracted to the grounded product. The charged powder particles accumulate on the grounded product and are electrostatically retained long enoughRead More …

Factors affecting the leveling of powder coatings

the leveling of powder coatings

Factors Affecting The Leveling of Powder Coatings Powder coating is a new type of solvent-free 100% solid powder coating. It has two main categories: thermoplastic powder coatings and thermosetting powder coatings. The paint is made of resin, pigment, filler, curing agent and other auxiliaries, mixed in a certain proportion, and then prepared by hot extrusion and sifting and sieving. They are stored at room temperature, stable, electrostatic spraying or fluidized bed dip coating, reheating and baking melt solidification, so thatRead More …

Is fluidized bed powder coating a good fit for your products?

There are several questions that need to be asked. First, since fluidized bed powder coating generally applies a thicker coating,

There are several questions that need to be asked. First, since fluidized bed powder coating generally applies a thicker coating, can the end part withstand the dimensional changes? Unlike electrostatic coating, fluid bed coating will generally smooth over any small details in the parts, such as embossed serial numbers, metal imperfections, etc. This can be extremely beneficial for parts where Faraday Cage effects are problematic. Welded wire products are good examples. Electrostatic spray has a hard time getting into theRead More …

Procedure of Measurement of coating thickness- ISO 2360

coating thickness- ISO 2360

Procedure of Measurement of coating thickness- ISO 2360 6 Procedure of Measurement of coating thickness 6.1 Calibration of instruments 6.1.1 General Before use, each instrument shall be calibrated in accordance with the manufacturer’s instructions, using suitable calibration standards. Particular attention shall be paid to the description given in Clause 3 and to the factors described in Clause 5. In order to minimize conductivity changes due to temperature variations, at the time of calibration the instrument and the calibration standards shallRead More …

Factors affecting measurement uncertainty -ISO 2360

ISO 2360

Measurement of coating thickness INTERNATIONAL STANDARD ISO 2360 5 Factors affecting measurement uncertainty 5.1 Coating thickness A measurement uncertainty is inherent in the method. For thin coatings, this measurement uncertainty (in absolute terms) is constant, independent of the coating thickness and, for a single measurement, is at least 0,5μm. For coatings thicker than 25 μm, the uncertainty becomes relative to the thickness and is approximately a constant fraction of that thickness. For measuring coating thicknesses of 5 μm or less,Read More …

Measurement of coating thickness – ISO 2360:2003 -Part 1

coating thickness- ISO 2360

Non-conductive coatings on non-magnetic electrically conductive basis materials — Measurement of coating thickness — Amplitude-sensitive eddy current method INTERNATIONAL STANDARD ISO 2360 Third edition 1 Scope This International Standard describes a method for non-destructive measurements of the thickness of non-conductive coatings on non-magnetic, electrically conductive (generally metallic) basis materials, using amplitude-sensitive eddy current instruments. NOTE This method can also be used to measure non-magnetic metallic coatings on non-conductive basis materials. The method is particularly applicable to measurements of the thicknessRead More …

The main advantages of NCS Natural Color System

NCS Natural Color System

Natural Color System ( NCS ) is the first choice for professionals engaged in sales, promotion and production in various industries.It is also the first choice for daily work of users such as designers, architects and teachers. Universal color language The colors described by the NCS system are consistent with those seen by our eyes and are not limited by language, materials, and culture. In the NCS system, we can define any surface color, and no matter what material isRead More …

Phosphate Coatings Pretreatment for Steel Substrates

Phosphate Coatings Pretreatment

Phosphate Coatings Pretreatment for Steel Substrates The recognised pre-treatment for steel substrates just prior to application of powder is phosphating which can vary in coating weight. The greater the conversion coating weight the greater the degree of corrosion resistance achieved; the lower the coating weight the better the mechanical properties. It is therefore necessary to select a compromise between mechanical properties and corrosion resistance.  High phosphate coating weights can give trouble with powder coatings in that crystal fracture can occurRead More …

Test for edge effect – ISO2360 2003

Bonded metallic powder coating

ISO2360 2003 A simple edge effect test, to assess the effect of the proximity of an edge, consists in using a clean uncoated sample of the basis metal as follows. The procedure is illustrated in Figure B.1. Step 1Place the probe on the sample, well away from the edge. Step 2Adjust the instrument to read zero. Step 3Progressively bring the probe towards the edge and note where a change of the instrument reading occurs with respect to the expected uncertaintyRead More …

Alkaline Acid Cleaners of CLEANING ALUMINUM

Cleaners of CLEANING ALUMINUM

Cleaners of CLEANING ALUMINUM Alkaline Cleaners Alkaline cleaners for aluminum differ from  those used for steel; they usually have a blend of  mild alkaline salts to avoid attacking the aluminum surface. In some cases, a small to moderate amount of free caustic soda may be present in the cleaner to remove difficult soils, or to provide a desired etch. In the power spray method of application, the parts to be cleaned are suspended in a tunnel while the cleaning solutionRead More …

Powder Coating Storage and Transportation in Summer

Powder Coating Storage And Handling

Powder Coating Storage and Transportation in Summer With the advent of summer, powder caking is a problem for many manufacturers. In addition to the process problems in the production process, storage and transportation are factors that affect the final spraying results. In summer, the temperature and humidity is high, and directly affect the final coating quality of the powder coating. The first is the effect of temperature, powder coatings must maintain their particle size in order to operate and use.Read More …

Paint Removal, How To Removal Paint

Paint Removal, How To Removal Paint

How To Removal Paint When repainting a part,prior to application of the new paint coat  the old,paint often must be removed. The waste reduction assessment should start by examining what causes the need for repainting: inadequate initial part preparation; defects in coating application; equipment problems; or coating damage due to improper handling. While no process is perfect, reducing the need for repainting has a direct effect on the volume of waste generated from paint removal. Once the need for paintRead More …

Repair of parts and hanger stripping in powder coating

hanger stripping in powder coating

The methods of part repair after powder coating can be put into two categories : touch-up and recoat. Touch-up repair is appropriate when a small area of the coated part is not covered and is unable to meet finishing specifications. When hanger marks are not acceptable, touch-up is required. Touch-up also may be used to repair slight damage from handling, machining, or welding during assembly. Recoat is required when a part is rejected because of a large surface area defectRead More …

Qualicoat – SPECIFICATIONS FOR A QUALITY LABEL FOR LIQUID AND POWDER ORGANIC COATINGS

7 Expression of results – ISO2360

7 Expression of results The expression and presentation of results shall be agreed between interested parties and normally includes: -a list of all the readings taken; -the mean, maximum, minimum readings; -the standard deviation and/or coefficient of variation. 8 Measurement uncertainty The instrument, its calibration, and its operation shall be such that the coating thickness can be determined to within 10 % of its true thickness. 9 Test report The test report shall include the following information: a) all informationRead More …

The use of epoxy electrically conductive putty

conductive putty

Conductive putty Intended Uses Used to repair and fill up the floor surface before painting with antistatic finish in order to provide smooth conductive surface for next coat. Product Information conductive putty can be applied by doctor blade. Thick film may be obtained. After drying, no contraction or crack takes place to the film. Easy to be applied.The film possesses good adhesion, high strength, and small electric resistance. Its apperance is smooth. Application details Volume Solids:90%Color:BlackDry Flm Thickness: Depending onRead More …

Bending Test – Qualicoat Testing Process

powder coating test

All organic coatings except class 2 and 3 powder coatings: EN ISO 1519 Class 2 and 3 powder coatings: EN ISO 1519 followed by a tape pull adhesion test as specified below: Apply an adhesive tape to the significant surface of the test panel following the mechanical deformation. Cover the area by pressing down firmly against the coating to eliminate voids or air pockets. Pull the tape off sharply at right angles to the plane of the panel after 1Read More …

What Hazardous chemicals in powder coating process

What Hazardous chemicals in powder coating process

Triglycidylisocyanurate (TGIC) TGIC is classified as a hazardous chemical and is commonly used in powder coating activities. It is: a skin sensitiser toxic by ingestion and inhalation genotoxic capable of causing serious eye damage. You should check SDSs and labels to determine if the powder coat colors you are using contains TGIC. Electrostatic powder coating containing TGIC are applied by electrostatic process.Workers who may come into direct contact with TGIC powder coatings include persons: filling hoppers manually spraying powder paint,Read More …

Two common types of ventilation in spray painting process

Two common types of ventilation in spray painting process

Two common types of ventilation used in spray painting are: Local exhaust ventilation captures the overspray and solvent vapour as close to the source of release as possible by drawing the contaminants into a capture hood. They should be fitted with a particulate filtration system to filter overspray. Wherever possible, local exhaust ventilation should be used when a spray booth cannot be used. It may be necessary to use it in combination with other control measures. Information on local exhaustRead More …

How To Powder Coat

HOW TO POWDER COAT

How to powder coat : pre-treatment – drying to remove water – spraying – Check – baking – check – Finished. 1.The characteristics of the powder coating can give full play to extend the coating life to break the painted surface first strictly surface pre-treatment. 2.Spray, was painted to be fully grounded in order to increase the efficiency of the powder coating of puffing. 3.The larger surface defects to be painted, coated scratch conductive putty, in order to ensure theRead More …

Cross Cut Test ISO 2409 Renewed

Cross Cut Test

The ISO 2409 Cross Cut Test has been recently updated by ISO. The new version that is now valid has several changes compared to the old one: Knives The new standard includes an enhanced description of the well-known knives.The knives need to have a trailing edge, because otherwise it skates instead of scratches. Knives that do not have this trailing edge are not according to the standard. Tape The new version of the standard has a huge change compared toRead More …

what is Powder Coating MSDS

powder coating msds

Powder Coating MSDS 1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION PRODUCT NAME:   Powder Coating MANUFACTURE/DISTRIBUTOR: Jinhu Color Powder Coating Co., Ltd Address: Dailou Industrial Zone,Jinhu County,Huai’an,China Emergency Response Call: 2. COMPOSITION/INFORMATION ON INGREDIENTS HAZARDOUS INGREDIENTS : CAS No.   WEIGHT (%) Polyester resin : 25135-73-3   60 Epoxy resin : 25085-99-8   20 Barium sulfate: 7727-43-7   10 Pigments: N/A   10 3. HAZARDS IDENTIFICATION Primary Routes of Exposure : Skin Contact,Eye Contact . Inhalation :Inhalation of dust or mist caused during heating and processing can cause irritation of nose, throat and lungs,headache,nausea Eye Contact :Material can cause irritation Skin ContactRead More …

What Is Powder Coatings Manufacturing Process

What Is Powder Coatings Manufacturing Process

Powder Coatings Manufacturing Process The process of powder coatings production includes the following steps: Distribution of raw material Pre-mixing of raw material Extrusion (mixing of melted raw materials) Cooling and crushing the extruder’s output Grinding , classifying, and controlling of the particles Packaging Pre-mixing of raw materials In this step, the distributed raw materials of each production unit will be mixed based on the guidelines and formulization of research and development unit in order to have a homogeneous mixture underRead More …

Powder coatings curing process in the Oven

Powder coatings curing process

Powder coatings curing process in the oven consists of three stages. First,the solid particles are melted,then they combine together ,and finally they form a uniform film or coating over the surface . Maintaining low viscosity of the coating for an adequate time is very significant to have a smooth and even surface. Having decreased during the curing process, viscosity tends to increase as soon as the reaction (gelling )begins. Thus ,reactivity and heat temperature have a significant role in creatingRead More …

Prevention of powder coating orange peel

Powder coating orange peels

Prevention of powder coating orange peel The appearance of the coating is becoming increasingly important in the new equipment manufacturing (OEM) Painting. Therefore, one of the main objectives of the coatings industry is to make the final requirements of the user paints to achieve the best performance, which also includes the surface appearance of satisfaction. Affect the visual effects of the surface condition by the factors such as color, gloss, haze, and surface structure. The gloss and image clarity isRead More …

How to construct zinc rich epoxy primers

zinc rich epoxy primers

Components: Zinc rich epoxy primers is composed of epoxy resin, curing agent. For two-component dispensing accessory products Features: Zinc rich epoxy primers anti corrosive resistance, good mechanical properties, adhesion, conductivity and cathodic protection. Purposes: can be used as a workshop Primed. Its film thickness of 15 ~ 25μm for welding, and does not affect the welding performance. The product can also be used as the use of anti-rust primer. For bridges, ships, offshore oil drilling platform, harbor facilities. Fourth, zincRead More …

Filiform corrosion is special kind of corrosion appearing mostly on aluminum

Filiform corrosion is special kind of corrosion appearing mostly on aluminum. The phenomenon resembles a worm creeping under the coating, always starting from a cut edge or a damage in the layer. Filiform corrosion develops easily when the coated object is exposed to salt in combination with temperatures 30/40°C and relative humidity 60-90%. This problem is therefore limited to coastal areas and linked with unfortunate combination of aluminum alloys and pre-treatment. To minimize filiform corrosion it is advised to ensure aRead More …

Phosphate treatment for powder coating

Iron phosphate Treatment with iron phosphate (often called thin layer phosphating) provides very good adhesion properties and has no adverse effects in the mechanical properties of the powder coating. Iron phosphate provides good corrosion protection for exposure in the low and middle corrosion classes, though it cannot compete with zinc phosphate in this respect. Iron phosphate can be used in either spray or dip facilities. The number of steps in the process may vary from 2-7, depending on the basemetalRead More …

Comparison of Cyclone recycling and Filter recycling in powder coating manufacturing

Cyclone recycling Simple construction. Simple cleaning. Effectiveness of separation depends to a large extent on operating conditions. Can produce considerable waste. Filter recycling All powder is recycled. Accumulation of fine-grained particles. May produce problems with spraying process, particularly with friction charging. Extensive cleaning: filter change requirement between colors.

A major advantage of powder coatings over liquid paint-reuse overspray powder

A major advantage of powder coatings over liquid paint systems is the ability to reuse powder that does not adhere to an object (overspray). Air and powder are separated by either a cyclone or a filter system, as illustrated. Powder that is recycled will be recollected in the powder hopper. Particles which are more easily charged adhere themselves to the object whilst the proportion being recycled are of another particle distribution size than that of virgin powder. The relationship betweenRead More …

Some important factors influencing powder spraying efficiency

Spray Gun Positioning All powder coating processes necessitate the powder, suspended in its air flow, being as close as possible to the object. The force of electrostatic attraction between powder particles and the object decreases by the square of the distance between them (D2), and only when that distance is just a few centimeters will the powder be drawn towards the object. Careful positioning of the spray gun also assures that small and large particles are deposited on the objectRead More …

Powder particles are electrostatically charged using Corona or Tribostatic Charging

Today, practically all powder coatings are applied using an electrostatic spraying process. A common factor with all such processes is that the powder particles are electrically charged whilst the object requiring coating remains earthed. The resultant electrostatic attraction being adequate to allow the build-up of sufficient film of powder on the object, thus holding the dry powder in place until melting occurs with subsequent binding to the surface. Powder particles are electrostatically charged using one of the following techniques: ConventionalRead More …

Factors affecting the utilization of electrostatic spraying

The main parameters affecting the utilization of electrostatic spraying comprising: the type of nebulizer, the level of electrostatic spray parameters, the conductive,etc. Businesses use spray equipment decided to paint utilization factors, has a very different because of the different paint spraying equipment utilization. Nebulizer paint utilization of mainstream spraying equipment and childhood to greatly: Ordinary air gun, Electrostatic air spray gun Spinning cup Second, spraying environment for the utilization of paint, such as the presence or absence of and electrostaticRead More …

Six advantages of powder coating spraying in aluminum surface treatment

Aluminum surface treatment in general anodizing, electrophoretic coating and powder coating spraying three kinds of treatment, each of these methods have their own advantages, a considerable market share Among them, the powder coating spraying there are the following significant advantages: 1.The process is relatively simple, mainly due to automatically improve the accuracy of the production process equipment, microcomputer control some of the major technical parameters can effectively reduce the difficulty of process operation, and auxiliary equipment is greatly reduced 2.HighRead More …

Types of functional powder coatings

The powder coating is a new type of solvent-free 100% solid powder coating. Has a solvent-free, non-polluting, recyclable, environmentally friendly, saving energy and resources, and reduce labor intensity and the film mechanical strength. The coating form and the formation of the coating solids of up to 100%, because they do not use solvents, thereby reducing environmental pollution, conserve resources and recyclable characteristics. The functional powder coating is a special function, surface coating materials to provide for special purposes. It not only canRead More …

The significance of particle size distribution analsis for powder coating

laser particle size analyzer test results: Average particle size (median diameter), the boundary of particle size and particle size distribution of the dispersion. The average size of the sample is less than and greater than 50% of particles. The boundary particle size: closer to the common sense to the maximum and minimum particle size. However, the maximum and minimum particle size to describe the upper and lower limits of the sample particle size unscientific, it is generally the boundary particleRead More …

Big difference between bonded and non-bonded powders

Bonded and non-bonded are terms usually used when referring to metallic powder coating.  All metallics used to be non-bonded, which meant that a powder base coat was manufactured and then the metal flake was mixed with the powder to create a metallic In bonded powders, the base coat is still manufactured separately, then the powder base coat and the metallic pigment are placed in a heated mixer and heated just enough to soften the powder. As the powder is mixedRead More …

D523-08 Standard text method for specular gloss

This standard is issued under the fixed designation D523; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval . A superscripl epsilon indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense . 1.Scope This test method covers the measurement of theRead More …

Out-gas and adhesion problems in powder coat zinc casting

zinc casting can be powder coated A cast part will have porosity that may cause blemishes in the coating at high temperature. Air that is trapped near the surface may expand and rupture the film during the cure process. There are several ways to mitigate the issue. You can preheat the part to drive off some of the trapped air that causes the problem. Heat the part to a temperature about 50°F greater than the cure temperature, cool it down,Read More …

Elements of a burning explosion of powder coating

The following aspects are the factors that cause the burning explosion of powder coating (A) The dust concentration exceeds the lower limit For these reasons, resulting in the powder room or workshop dust concentrations exceed the lower explosive limit, so that the formation of the main conditions of the powder combustion and explosion, if moderate sources of ignition, it is very likely to produce combustion and explosion (B) Powder and paint shop to mix In some factories, due to lessRead More …

Micro-particles of powder coatings to optimize the coating process

Japanese paint company developed an average particle size range between 20 ~ 40μm particles of powder coatings has been patented, ready to officially expand its market The powder coating is the durability of good varieties, and the appearance of the coating is less than the solvent-based paint. In general, the smaller the powder particle size, and its aesthetic appearance of the coating, the better, but more than one of content than the average particle size of micro-powder coating application efficiencyRead More …

Epoxy-based coatings can be named two part epoxy coatings or used as a powder coating

Epoxy is a copolymer which is obtained by the reticulation of an epoxide (resin) with a polyamine (hardener). They are well-known for their high level of adhesion, especially on metal, high chemical and thermal resistance, and excellent electrical insulation ability. Epoxy formulations are therefore a preferred solution for many electrical parts and electronics (e.g: coil coating, solder mask on circuit boards). Overall epoxy coatings are more expensive than other systems like Alkyd or Acrylic, but they also show higher performances. On the other hand epoxyRead More …

Quality Certification for MDF powder coating

MDF powder coating needs what level of quality is ultimately the customer decides. Customers a variety of requirements for MDF powder coating is very important. For the production of TV cabinets, monitors, bathroom furniture or cabinet doors, MDF coating is very different. Decided to use what powder, what quality MDF and paint line design, you must first find out the customer’s quality requirements When required to achieve high-quality MDF powder coating, we have to use the most active high-performance powder,Read More …

Powder coating line has been proven to be the most important factor to obtain high-quality MDF powder coating.

Powder coating line has been proven to be the most important factor to obtain high-quality MDF powder coating. Unfortunately, the small metal surface powder coating company, if you want the old metal powder coating production lines to obtain high-quality MDF powder coating is impossible The most important part of the spraying production line oven technology oven paint melting. If the thermal curing powder chemical curing. To remember is that the low thermal conductivity of the MDF. Therefore, the design ofRead More …

Fully understanding performance of MDF is required before coating

Powder paint spraying spraying the metal surface has been very mature, very stable and have a good level of control. MDF powder coating and metal surface powder coating in order to understand why a big difference, we must know the inherent characteristics of the MDF. People often think that the main difference between the metal and the MDF is the electrical conductivity. In terms of the absolute conductivity value, this may be correct; However, it is not MDF powder coatingRead More …

Challenges for MDF powder coating

China’s fiberboard annual output of more than one hundred million cubic meters. MDF (medium density fiberboard), the annual output of about 30 million cubic meters of 16mm specifications operator, light MDF there are about 1.8 billion square meters. With the technological development outside of MDF fiberboard such as popcorn board, etc. can also be powder coating. Expected to have a potential market of hundreds of thousands of tons of powder volume. In other words, the wood panels powder coating hasRead More …

Titanium dioxide to improve the quality of polyester epoxy powder coating

Into the details of the competition in the powder coating industry,paint coatings have been included in the investigation link.Polyester epoxy powder coating to improve the quality of the process, a high degree of titanium dioxide in an important position,because we recognize the titanium dioxide polyester epoxy powder coating product quality has become a part of. Become one of the most important products in many powder coating products, polyester epoxy powder coating for its outstanding performance. Composed of polyester resin, epoxyRead More …

Atlanta launched a new ship metal epoxy powder coating

Headquartered in Maryland, USA, Atlanta, powder coating company in Stevensville, a dedicated, metal coating for marine vessels, design of new metal epoxy powder coating products to market. Marine vessels to use the metal to face the harsh external environment, such as sun exposure, moist air and seawater corrosion, degradation of the metal soon,which will not only destroy the appearance of the ship,but also affect the use of performance resin to be dangerous. Marine vessels, coating performance requirements are very high,Read More …

Technology progress of coil powder coating paint

Pre-coated coil can be used in building internal and external wall panels, and there are broad prospects in the appliance, automotive, metal furniture and other industries. From the 1980s, China began to introduce and absorb foreign technology, especially in recent years due to the building materials market and the automotive electronics market costs and environmental requirements,a large number of domestic coil powder coating production line launched The powder coating is known for its high efficiency and environmental protection,China has becomeRead More …

The Teflon Coating Process

The goal of both Teflon coating and powder coating is basically similar, although the processes used to apply each of them are slightly different. Both coatings are meant to impart some specific property to the item that is being coated. For powder coating, the goal is a protective layer that will keep the item from being damaged, although with Teflon, usually a non-stick surface is the property that is intended to be given to the item it is being applied Read More …

what do you expect from a good powder coating gun

The answer is very simple. A good equipment must ensure- Consistent 100 KV at gun tip voltage. Uniform flow of powder for uniform powder deposition. The machine should be easy to operate and maintain. The manufactures or his representative should be accessible to get spares parts and support on time and that too at reasonable price. After knowing this you may asked that what will happen if my equipment does not have all what I said. The answer is veryRead More …

Dry-Blended metallic powder coating VS Bonded metallic powder coating

Metallic and mica powder coating contains metal flake or mica particulate matter that gives these coatings their special appearance. These flakes and particulars are a freestanding component. Metallic powder coating is homogeneously blended with a base color powder and are referred to as Dry-Blended powders. They are available in Epoxy, Hybrid, Urethane, and TGIC Polyester chemistries The problems faced with dry-blended powder coating are with color consistency, limited penetration in recessed areas, and their limited ability to be recycled. Dry-blendedRead More …

Spraying method in Can production process

This coating method so that the powder, causing the electric field from the positively charged powder particles with a negative charge, in this case, the cans or the lid is grounded, so that you can absorb the powder particles. This corona coating method is the power to remove the powder particles electric charge by friction, this triboelectrification method to reduce the electrostatic shielding effect, the powder particles can be moved to the corner location and crannies of parts of cansRead More …

Can production process in the spray powder application

Of the canning process, the tank internal use of pre-printed iron, coated paint to give to stay side seam welding Department Food Liquid Coatings, Printing, generally coated to stay side is more difficult, many plant before seam welding The scraping edge processing, does not affect the quality of the seam welding. Also complement coated weld seam welding, the process is more complex, but the quality is not easy to guarantee. Increasingly popular in recent years, powder coating paint process isRead More …

Acrylic Matt Powder Coatings

Abstract: The new matt acrylic powder coating successfully for the powder coating industry in China has opened up new areas of technology, the article discusses the development of many technical issues need to be resolved in the paint. 1 Introduction The powder coating rapidly forward, an endless stream of new varieties. Indoor powder coating polyester – epoxy (mixed type) as the representative in China has for many years. Varieties of high-gloss, flat, half-light, low light (also known as matte), matte,Read More …

Good choice of Antibacterial epoxy powder coating with excellent anti-corrosion

In the oil field oil and water pipelines, there are a lot of bacteria, especially sulfate-reducing bacteria, iron bacteria, the existence of saprophytic bacteria and multiply incessantly and pipe scale, and are subject to severe clogging and corrosion, a direct impact on oil production, oil and water injection. Oil field water pipelines, generally using the anti-corrosion of the steel pipe lined with cement mortar, the use of strong alkali in the cement mortar to inhibit bacterial attachment and reproduction toRead More …

China has been active in development of powder coatings related to national standards and industry standards

At present, China has been active in development of powder coating related to national standards and industry standards, gradually standardize Powder Coating and coating industry organizations in the coordination of efforts to regulate the market, so that the powder coating paint market matures, and with international standards. Need of powder coating industry organizations, suppliers, research institutions, construction companies, joint efforts to constantly open up new areas, and in accordance with a reasonable choice for end-use, development and proper use of powder coating.Read More …

The powder coating industry in China is in urgent need of legislation.

Powder coating industry in China over the past decade, the continued rapid growth, compared with developed countries, there are still some gaps. 1. powder coating a single species, low-grade, high-grade Powder coating a single species specific performance is: compared with U.S. and European markets, the powder coating structure of the varieties compared with foreign countries is somewhat different, 12% epoxy powder coatings, epoxy polyester powder coatings accounted for 65% Polyester TGIC powder coatings accounted for 19%, 3% polyester / Primid powder coating,Read More …

Future Development Trends of the powder coating

Future Development Trends of the powder coating 1 Powder Coating in the automotive industry The automotive industry is a pillar industry in China, investment in the next five years is equivalent to nine times in the Eighth Five-Year Plan “period, the social ownership of our cars in 2005 will reach 20.6 million. At present, the powder coating used for the coating of automotive engine, chassis, wheels, filters, joystick, mirrors, wiper and horn and other parts in the automotive industry. Abroad, transparent powderRead More …

Foreign production developments of powder coatings

Foreign production of powder coating application began in the 1950s of the last century, after 50 years of development, production increased from 70,000 t in 1980 to grow to 793 000 t in 2001, an increase of 11.5 times the average annual growth rate of 13% The world about the powder coating manufacturer more than 500 (excluding China), Europe is at least 100, United States, about 70, about 15 Japanese, South Korea, about 7. The world average factory annual outputRead More …

Epoxy resin application technology development trends

Epoxy resin technology development trends in the development of high-performance, high value-added emphasis on environmental protection and production safety. Special structure of epoxy resins and additives product toward the sophisticated, functional, and curing in the special circumstances of development. The cured product with high toughness, high strength, resistance to radiation, the direction of the high and low temperature. This special resin, hardener, thinner varieties will have a greater development, the formation of the pattern of the more varieties of smallRead More …

Electrostatic powder coating accident prevention

Compared to the electrostatic spraying and painting, painting or mechanical spray, can greatly improve the working environment of workers, so that the mist is no longer flying into the air to ensure workers’ health. But for various reasons such as national standards and norms operating in the electrostatic powder coating operation fails due to operator, leading to the frequent occurrence of fire, explosion and serious accident in the electrostatic spraying operations. Therefore, electrostatic powder coating accident prevention must draw theRead More …