NONDISCOLORING ELECTRODEPOSITION COATING METHOD OF ALUMINUM EXTRUDED MATERIAL APPLIED WITH INORGANIC ELECTROLYTIC COLORING

摘要

PURPOSE:To ensure a uniform coloring and coating of film with no discoloring, by giving an inorganic electrolytic coloring to the aluminum extruded material with the porous oxide film formed on the surface after application of an anodizing process in the aqueous solution containing the sliver salt and then soaking the extrusion material into the aqueous solution of the thioacid or its salt with then application of an electrolytic coating. CONSTITUTION:The aluminum extruded material applied with an anodizing process is electrolyzed in the metal aqueous solution containing at least one of silver salts for an inorganic electrolytic coloring. The extruded material is then soaked into the aqueous solution containing the thioacid or its salt and then receives an electrodeposition coating.