Corrosion protection, paint adhesion, uniform coverage and cost effectiveness are qualities that have been sought by metal finishers from the infancy of metallurgy and can all be furnished by the use of a phosphate coating. Phosphating is a relatively simple process that has been used for well over a century to protect metal from corrosion. In general, phosphating is the conversion of a metal surface into an insoluble and integrated lattice of metal and crystalline phosphate. This process takes place by the treatment of the surface with a solution of phosphoric acid and other chemicals, which react with the metal to form a slightly protective layer.