Patent ID: 9650722
Date: 2017-05-16
CPC Classifications: C25D,Y10T

Claim:
1. A method of manufacturing a chrome-plated part, comprising: forming a corrosion distribution plating layer configured for corrosion current distribution; a bright nickel plating layer; and a non-sulfur nickel plating layer over a body, wherein the bright nickel plating layer is provided between the corrosion distribution plating layer and the non-sulfur nickel plating layer, and the non-sulfur nickel plating layer is more noble potential than the bright nickel plating layer; forming a 0.05 to 2.5 micrometers thick trivalent chromium plating layer on the corrosion distribution plating layer using basic chromium sulfate as a metal source, the trivalent chromium plating layer having a composition comprising 3 to 19 at % of C, 55 to 95 at % of Cr, 1 to 22 at % of O, and 1 to 7 at % of Fe and having 5000/cm forming a not less than 7 nm thick chromium compound film on the trivalent chromium plating layer by cathode acidic electrolytic chromating, wherein the cathode acidic electrolytic chromating is performed at a current density of 0.1 to 1.0 A/dm wherein forming the corrosion distribution plating layer is carried out in a microporous nickel plating bath so that the 5000/cm