Phosphating Chemical - Phosphating Process in Metal Treatment Phosphating is a chemical treatment used on metal surfaces to provide corrosion resistance, improve paint adhesion, and enhance wear resistance. It involves applying a phosphate coating by immersing or spraying the metal with a phosphate solution. * Types of Phosphating 1. Zinc Phosphating - Provides excellent corrosion resistance. Commonly used as a base for painting and powder coating. Used in the automotive and appliance industries. 2. Iron Phosphating - Produces a thin phosphate layer. Improves paint adhesion but offers lower corrosion resistance than zinc phosphating. Used in general metal finishing and powder coating. # Phosphating Chemical Manufacturer.