Blasting vs Phosphating - Anodizing, Plating, Powder ...
Aug 06, 2008·A blasted surface may not survive 5 minutes in a salt spray test; phosphated surfaces designed for powder coating would usually not be tested until after the powder coating because salt spray testing of phosphated surfaces tells us more about the wax or oil than the phosphate, and you don't want to wax or oil the surface before powder coating.