COMPOSITION FOR FORMING PROTECTIVE FILM, METHOD FOR MANUFACTURING METAL-MOLDED BODY, AND METAL-MOLDED BODY

摘要

PROBLEM TO BE SOLVED: To provide a composition for forming a protective film which reliably inhibits the change of a color tone from occurring on a galvanizing film and a corrosion preventive film formed on the surface of the galvanizing film. SOLUTION: The composition for forming the protective film is used for covering the corrosion preventive film on a metal-molded body having the galvanizing film and the corrosion preventive film formed on the surface of the galvanizing film. The composition is composed of an aqueous solution which includes an inorganic silicon compound, an inorganic salt of lithium, and an inorganic salt of magnesium. COPYRIGHT: (C)2007,JPO&INPIT