Process for electroplating metals

Details Process for electroplating metals Process for electroplating metals

C - Chemistry, Metallurgy

25

D

204/134, 204/28

C25D 5/00 (2006.01) C25D 17/00 (2006.01) C25D 21/00 (2006.01) C25D 21/18 (2006.01)

Patent

CA 2016031

-27- Title: PROCESS FOR ELECTROPLATING METALS Inventor: CRAIG J. BROWN ABSTRACT OF THE DISCLOSURE A process for electroplating metals in an electroplating cell in which the anode current efficiency of the cell is greater than the cathode current efficiency. Buildup of excess metal in the cell is counteracted by circulating the plating solution through an electrowinning cell and plating out the excess metal onto cathodes in the electrowinning cell. The amount of current flowing through the electrowinning cell is controlled so that the amount of the said current which results in the deposition of metal is at least substantially equal to the amount of current flowing through the electroplating cell which results in the evolution of hydrogen gas.

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