wash primer

wash primer

[′wäsh ‚prī·mər] (metallurgy) A synthetic vehicle primer containing phosphoric acid and zinc chromate; used as a corrosion-inhibiting first paint coat on metals.

wash primer

A primer containing polyvinyl butyral, zinc chromate, alcohol, and phosphoric acid; applied in a thin film to bare steel, causes etching of the metal, thereby promoting adhesion of the subsequent coat.