Phosphate coatings are a crystalline conversion coating that is formed on a ferrous metal substrate. Phosphate coating is employed for the purpose of pretreatment prior to coating or painting, increasing corrosion protection and improving friction properties of sliding components.
USED FOR
Phosphate coating provides strong adhesion and corrosion protection, and also improves the friction properties of sliding components. Some of the threaded parts are treated with phosphate coatings, which improves their anti-galling and rust inhibiting characteristics