| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a chrome-plated part having high resistance to corrosion and providing a white silver design similar or equivalent to hexavalent chromium plating with decorative trivalent chromium plating as the base. <P>SOLUTION: An nickel plating layer 5a intended for corrosion current distribution is formed over a body 2, and a 0.05 to 2.5 micrometers thick surface chrome plating layer 6 made of trivalent chromium is formed on the surface thereof using basic chromium sulfate as a source of metal. Further on the same, a not less than 7 nm thick chromium compound film 7 is formed by cathode acidic electrolytic chromatin. The corrosion distribution nickel plating layer 5a has a function of forming a microporous structure, a microcrack structure, or the both of the same in the surface chrome plating layer 6. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
