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.
The problems with powder coating application over galvanized surface
Polyester powder coating over hot dip galvanized steel provides a high grade architectural finish to steel items with excellent atmospheric weathering characteristics.The powder coated product ensures maximum durability for steel components, which will generally provide 50 year+ rust free life spans in most architectural applications. Even so there are still some problems during this application. Hot dip galvanized surfaces have been acknowledged as difficult to powder coating since the technology was first developed in the 1960’s. Industrial Galvanizers commenced research inRead More …
How to prevent powder dust explosion
An explosion can be prevented if both or either of the conditions Explosive Limit and Source of ignition are avoided. Powder coating system should be designed to prevent both conditions occurring ,but due to the difficulty of totally eliminating sources of ignition,more reliance should be placed on the prevention of explosive concentrations of powder. This can be achieved by ensuring that the powder in air concentration is kept below 50% of the Lower Explosive Limit(LEL). Determined LELs on the rangeRead More …
The causes of dust explosion and fire hazards during manufacturing powder coating
Powder coatings are of the fine organic materials, they can give rise to dust explosions. A dust explosion may break out when the following conditions happen at the same time. A ignition sources is present, including: (a) hot surfaces or flames;(b) electrical discharges or sparks;(c) electrostatic discharges. The concentration of dust in the air is between the Lower Explosive Limit (LEL) and Upper Explosion Limit (UEL). when a layer of deposited powder coating or a cloud comes into contact with anRead More …
Powder Coatings Manufacturing
Weigh-up and Mixing ( raw material,such as resins,hardener,pigments,filler,etc) Extrusion Process Milling and Sieving
Phosphating conversion coatings
The recognized pre-treatment for steel substrates just prior to application of powder coatings 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 occur when the coating is subjectedRead More …
Difference of Corona Charging and Tribo Charging
Critical Variables Corona Tribo Faraday Cage More difficult to coat recesses Easier to apply to recesses Back Ionization Easier to coat thinner films Easier to produce thicker films Products configuration Not good for complex shapes Very good for complex shapes Production requirements Wide range of line speeds Good for lower line speeds Powder Chemistry Less dependent on chemistry More dependent on chemistry