finishing-and-treatment-manufacturing-processes > Zinc Phosphating

Zinc Phosphating is a Conversion Coating process by which the surface of a metal is transformed into a crystalline structure of phosphates through the use of chemical solutions either applied by spray or submersion techniques.

Zinc Phosphating forms a porous crystalline structure providing an excellent base for further coating. For this reason, Zinc Phosphating is commonly used as a pre-treatment for Powder Coating and Electrophoretic Coating, as the crystalline structure offers superior adhesion to the base metal.

Zinc Phosphating also offers superior corrosion resistance to Iron Phosphating. Both allow Electrophoretic Coated, Painted or Powder Coated surfaces to be damaged and still remain corrosion resistant.

Increased surface lubricity can be achieved through an oiling process, as the Zinc Phosphate pre-treatment forms an abrasive crystalline phosphate surface structure.

A range of both ferrous and non-ferrous materials can be Zinc Phosphate conversion coated.