METHOD OF TREATMENT OF NON-FERROUS METALLIC SURFACES THROUGH AN ACID ACTIVATING AGENT AND AN ORGANOPHOSPHATE OR ORGANOPHOSPHONATE AND SUBSTRATES TREATED BY SUCH METHOD.

摘要

A METHOD FOR TREATING A NON-FERROUS METAL SUBSTRATE SUCH AS ALUMINUM IS PRESENTED WITH AN ACID ACTIVATING AGENT SUCH AS HF FOLLOWED BY TREATMENT WITH AN ORGANOPHOSPHATE OR ORGANOPHOSPHONATE. THE TREATMENT PROVIDES IMPROVED ADHESION AND GOOD FLEXIBILITY AS WELL AS GOOD RESISTANCE TO MOISTURE, CORROSION BY SPRAY OF SALTS AND DETERGENTS OF SUBSEQUENTLY APPLIED COATINGS.