Phosphate Coatings

Phosphate coating is a crystalline conversion coating that is formed on a ferrous metal substrate. The phosphating process relies on the basic pickling reaction that occurs on the metal substrate when the process solution comes in contact with the metal. This coating is employed for the purpose of pretreatment prior to painting, increasing corrosion protection, and improving friction properties of sliding components. In other instances, phophate coatings are applied to threaded parts and top coated with oil to add anti-galling and rust inhibiting characteristics.

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