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topic 7323

Copper is Building Up in Cyanide Copper Plating Baths


(2001)

Q. I work for a company that operates a three large 56,000 liter copper cyanide electroplating baths. The bath operates using soluble copper anodes contained in titanium baskets.

The problem we are finding is that the anode efficiency is greater than the cathode efficiency resulting in a build-up of copper in the bath. This build-up of copper we are finding has a detrimental effect on the quality of the plated components.

How do I maintain the copper balance in the bath?

Any suggestions would be appreciated.

What is OFHC copper?

Regards

David Morris
- UK


(2001)

A. You may try to use insoluble steel anode instead of copper anode.

OFHC means Oxygen Free High Conductivity.

Jason Wu
- Hong Kong SAR


(2001)

A. We vary the anodes. We use three baskets on one side of the tank and one anode basket on the other side with two steel anode sheets. Our copper levels remain very consistent with this method.

Angie Molnar
- Canada



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