TRIVALENT CHROMIUM-PLATED PRODUCT COATED WITH CORROSION-RESISTANT FILM, TRIVALENT CHROMIUM-PLATING CORROSION PROTECTIVE METHOD, AND TRIVALENT CHROMIUM PLATING CORROSION PROTECTIVE LIQUID

摘要

PROBLEM TO BE SOLVED: To enhance the corrosion resistance of a plating with trivalent chromium to solve a problem that the plating with trivalent chromium is inferior in corrosion resistance to hexavalent chromium. SOLUTION: A corrosion-resistant film 40 composed of a silane coupling agent and a silica sol is formed on a plating 30 with trivalent chromium on a surface of an iron base plate 10. COPYRIGHT: (C)2008,JPO&INPIT