COATING COMPOSITIONS CONTAINING PHOSPHATE, ZINC, NICKEL AND MANGANESE IONS, FOR COATING METAL SURFACES; PHOSPHATING PROCESS

摘要

Zinc phosphate coatings for metal surfaces and phosphating process. Concentrates containing (a) hydroxylamine sulfate and (b) zinc, nickel, manganese and phosphate ions are formulated into aqueous coating solutions for treating metal surfaces, including ferrous, zinc and aluminum surfaces.