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.
Elimination of the effects caused by 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
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
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
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
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
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 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
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
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 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 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 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 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
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
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, 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
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
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
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 …
What is general mechanical properties of powder coatings
The general mechanical properties of powder coatings include the following. Cross-cut Test (adhesion) Flexibility Erichsen Buchholz Hardness Pencil Hardness Clemen Hardness Impact Cross-cut Test (adhesion) According the standards ISO 2409, ASTM D3359 or DIN 53151. On the coated test panel a cross-cut (indentations in the form of a cross and parallel to each other with a mutual distance of 1 mm or 2 mm) is made on the metal. A standard tape is put on the cross-cut. The cross-cut isRead More …
How to Remove Powder Coating
Many methods have been used to remove powder coating from production hooks,racks,and fixtures. Abrasive-media blasting Burn-off ovens Abrasive-media blasting Benefits. Abrasive-media blasting is a common method used in the finishing industry to clean electro-deposition and powder coatings deposits from racks. Abrasive-media blasting provides adequate cleaning and coating removal. One of the benefits of rack cleaning with abrasive media is any rust or oxidation that may be present is removed with the coating, and this is accomplished at ambient, or room, temperature. Concerns. UsingRead More …
The main advantages of 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 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
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 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 …
How to maintenance cure oven in powder coating
Monthly maintenance and inspection schedule for cure oven in powder coating include the following aspects. Fuel safety shutoff valves These valves stop the fuel supply in an emergency. Check all manual and motorized fuel valves to see if they are operating properly. Fan and airflow interlocks Now is the time to inspect the air switches that regulate air movement and fan operation . These devices assure that that the oven is purged properly before ignition. They also assure that theRead More …
Powder Coating Storage and Transportation in Summer
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
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
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 …