Zinc Phosphate

What Does Zinc Phosphate Mean?

Zinc phosphate is an inorganic chemical compound consisting of zinc, phosphorous and oxygen with the chemical formula Zn₃(PO₄)₂. It is commonly used as a corrosion inhibitor when applied to metallic surfaces.

Corrosionpedia Explains Zinc Phosphate

Zinc phosphate is used to produce corrosion resistant coatings that are typically applied either as part of an electroplating process or as a primer pigment. It reacts moderately with water and is acid soluble with zinc sources, allowing it to have good moisture resistance and galvanic substitution properties. When used in a micronized form for pigmentation it is suitable for a wide range of primer applications.

Zinc phosphate is also a key component of zinc orthophosphate hydrate, which is a protective compound that is easy to disperse. Its low solubility behavior provides high compatibility with both solvent- and water-based resins.