Phosphate Coating

Zinc phosphate is a nickel-phosphate system used for iron and steel. The coating generated by the phosphate system weighs over 2000 milligrams per square foot. Under atmospheric conditions, the surface becomes stable and exhibits excellent corrosion resistance and electrical insulation properties. Additionally, after a sealing treatment, its corrosion resistance is significantly enhanced, improving the phosphate coating's resistance to acids, alkalis, ammonia, seawater, and water vapor. The porous structure formed by the crystalline film provides excellent adsorption properties, which is why it is commonly used as a base layer for paint coatings. On the other hand, it is also used for adsorbing lubricating oil, which helps reduce the friction coefficient and improve lubrication.