Home appliances, automotive components, furniture, sanitary fittings, power tools, oil filters, air cleaners, & hot water radiators. for toughness, hardness & corrosion resistance. architectural, electric & electronic industrial components.
The Powder Coating Process
Powder coating processes may vary by the type of coating material being applied.
However, the processes can generally be divided into four functions:

  • Preparation of the Surface
  • Application of the Powder
  • Heating of the Part
  • Curing of the Coating

Preparation of the surface starts with a process to insure that the surface is properly cleaned and free of “soils” such as manufacturing oils. Subsequent surface treatments might include blasting, if required and iron phosphate or zinc phosphate coating depending on the long term corrosion performance desired Thermoplastic powders normally require a primer to promote adhesion. Thermoset powders do not need a primer because they have an adhesion promoter built-in. However, primers may be used with thermosets to enhance certain properties. The priming material used must be compatible with the curing temperatures required for powder coatings.
The term pretreatment refers to the mechanical or chemical surface treatment for a manufactured product. It may be as simple as a solvent wipe or it may be a multistage spray washer that cleans the part and applies a conversion coating for good paint adhesion and performance.
Pretreatment chemicals and process vary from substrate to substrate. Given below are the types of pretreatment suitable for most widely used sheet metals.
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