Zincromate Primer also known as zinc chromate primer, is a type of anti-corrosion coating used on metal surfaces. It is made up of a mixture of zinc chromate, a chemical compound that contains zinc and chromate ions, and a binder or carrier material, such as epoxy or polyurethane. Zincromate primer is known for its ability to protect metal surfaces from corrosion caused by exposure to moisture and other corrosive substances.