COMPOSITION AND METHOD FOR POST-TREATING METAL SURFACE SUBJECTED TO PHOSPHATE SKIN FILM CHEMICAL FORMING TREATMENT

摘要

A process of post-treating a conversion-coated metal surface by contacting the surface with a dilute solution of a post-treatment compound, or a metal salt thereof, where the post-treatment compound is poly-4-vinylphenol or the reaction product of an aldehyde or ketone and poly-4-vinylphenol.