Process of coating metal surfaces

摘要

A process is provided for applying a coating of film-forming material to an acid-etchable metal without the use of electricity wherein the metal is immersed in an aqueous dispersion of a film-forming material cationically dispersed in water which also contains the carboxylic acid radical derived from acrylic acid or methacrylic acid or an oligomer thereof, and the resulting wet coating is dried on the surface of the metal.