Abstract:
PROBLEM TO BE SOLVED: To provide a trivalent chromium plating bath by which a plated film having a smooth surface, high corrosion resistance and satisfactory wear resistance is obtained with high productivity. SOLUTION: The trivalent chromium plating bath contains following components (1)-(4), that are, (1) a trivalent chromium complex solution obtained by holding at least one kind of component selected from aqueous aliphatic carboxylic acids and the salts and an aqueous solution containing a trivalent chromium compound under heating , (2) a conductive salt, (3) a pH buffer agent and (4) at least one sulfur-containing compound selected from a group comprising compounds having SO 2 group and compounds having SO 3 group. COPYRIGHT: (C)2009,JPO&INPIT