Phosphate Coatings

Phosphate coatings are a crystalline conversion coating that is formed on a ferrous metal substrate. Phosphate coatings are employed for the purpose of pretreatment prior to painting, increasing corrosion protection, and improving friction properties of sliding components. In other instances, phosphate coatings are applied to threaded parts and top coated with oil (P&O) to add anti-galling and rust inhibiting characteristics.

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. Typically phosphate coatings used on steel parts but can also be used on aluminum.

Manganese Phosphate Coatings

We offer manganese phosphate coatings (Type M) used for corrosion protection, anti-galling and lubricity. In comparison to zinc phosphate coatings, manganese phosphate coatings offer continued wear protection after the breaking in of components that are subject to wearing. These coatings are applied only by immersion.

Zinc Phosphate Coatings

Zinc phosphate coatings (Type Z) are also available and are mainly used for rust proofing on ferrous metals. They can be applied by immersion or spraying.

Phosphate Coating Statistics
Color	dark gray / black
Coating Weight	2000-3000 mg / sq. ft
Top Coats	Oil or Paint

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