Inorganic coatings applied by dipping or spraying to enhance the adhesion of coatings to metal surface and to improve the corrosion resistance. See Also Phosphating

Surface treatment performed to improve adhesion of coating to metal surfaces and to reduce corrosion tendency (inactivation) of metal surfaces. Phosphating is carried out either by using iron phosphate solutions resulting in more limited protection or by using solutions containing one or more of zinc, manganese and nickel phosphate salts resulting in thicker coatings. The latter case provides better adhesion and higher corrosion resistance.