High-rate chromium alloy plating

Details High-rate chromium alloy plating High-rate chromium alloy plating

C - Chemistry, Metallurgy

25

D

204/26

C25D 3/56 (2006.01) C25D 5/04 (2006.01)

Patent

CA 1195645

Abstract High-speed plating of corrosion-resistant, chromium alloy coatings from divalent/trivalent chromium solutions is feasible with high current densities, rapid solution flow and careful control of pH. Chromium-iron alloy (optionally further containing nickel and/or cobalt) coatings are plated on copper cathodes, for example, from trivalent chromium baths at 30 microns per minute and 160 A/dm2. Current densities in the range of about 75-400 A/dm2 (5-26 A/in2) are most useful.

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