6 Stage Pre-Treatment for Longer Lasting Paint
The foundation to any good quality Powder Coating is in the pre-treatment process utilized in treating the Aluminium before powder coating. This is because powder, as a cured film, is actually permeable. The solid cured film contains many millions of micro pores which allow moisture to permeate through the film which can potentially promote corrosion of the substrate from beneath the powder coating.
The Aluminium is initially processed via an Acid etch cleaner which removes surface contamination and etches the surface of the substrate in preparation for the chromate conversion layer. After acid cleaning, the part is subject to two fresh water rinses before entering the chromate bath. Following chromate conversion, the parts are rinsed in two stages of demineralized water baths.
This demineralized water rinse ensures that the part is completely free of water contaminants, particularly salts, prior to force dry off. The chromate conversion layer ensures long term corrosion resistance of the powder coated surface thus giving it a warranty grade finish.