Zinc phosphate Wikipedia
Zinc phosphate is an inorganic compound with the formula Zn 3 (PO 4) 2)(H 2 O) white powder is widely used as a corrosion resistant coating on metal surfaces either as part of an electroplating process or applied as a primer pigment (see also red lead).It has largely displaced toxic materials based on lead or chromium, and by 2006 it had become the most commonly used corrosion inhibitor.