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How to remove metallic impurities in cadmium bath

Hello sir,
I was facing a problem with my cadmium bath which contains cadmium, sodium cyanide and caustic soda [affil links] .The problem was white patches in low current density areas then I consulted my chemical supplier they says that the bath is contaminated by impurities and suggested dummying the bath. I want to know any other process to remove impurities other than dummying.

Ranga Reddy
plating shop - Kushaiguda, India
September 12, 2008

November 7, 2009

Hi, Ranga. "Too many cooks spoil the broth".

If you are going to use a proprietary plating chemistry supplier, there is a lot to be said for following their instructions about how to fix the problems with the baths, rather than half-following them and half doing contrariwise :-)

But if you would like to better understand the troubleshooting of plating baths, and the treatments to address difficulties, the Canning Handbook is a wonderful resource. Good luck!

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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