Phosphate coatings are used on steel parts for corrosion resistance, lubricity, or as a foundation for subsequent coatings or painting. The main types of phosphate coatings are manganese, iron, and zinc. We currently offer zinc phosphate coatings, which are used for corrosion resistance (phosphate and oil), a lubricant base layer, and as a paint/coating base.

The zinc phosphating process relies on a chemical reaction that occurs on the metal substrate when the process solution comes in contact with the metal.

The zinc phosphate coating appears from black to light gray.

Coating thickness for zinc phosphate ranges between .0002 and .0006 inches.


• These coating serve as surface preparation for further painting and coating
• Provides excellent adhesion and electric isolation
• Interlocks the phosphate coating after drying
• Lessen under film corrosion

Specifications offered

IS 6005 (1998):
Code of practice for phosphating of iron and steel

IS _: 3618 - 1966 (Reaffirmed 1991)
Specification for phosphate treatment of iron and steel for protection against corrosion