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Tarnishing on copper plating
Q. In 1.2 mm thick sheet I am doing the copper (Barrel) plating of 5 to 10 microns (I am doing cyanide copper plating as an undercoat and acid copper for top for better look after that I am using some top coat as an anti tarnishing solution (packing is 100% perfect with all safety precautions for tarnishing). Still I am facing tarnish. What is the best suggestion?
Kannan BoopathiDevelopment - India
October 14, 2008
A. There are various causes of tarnishing. Check copper bath for metallic impurities, use a hot DI final rinse (water quality is often the culprit) and make sure the anti-tarnish solution is up to par. Good Luck!
Mark BakerProcess Engineer - Syracuse, New York
October 16, 2008
A. 1. I have found in the web that TOLYTRIAZOLE & BENZOTRIAZOLE
⇦ this on
eBay
or
Amazon [affil links]
are chemicals that can be used for anti tarnishing are there any recommended chemical or manufactures ?
2.Tarnishing usually appears after 48 hrs is there any method to know poor anti tarnishing treatment within hours of few hours of plating?plating
- Bangalore, India
December 11, 2008
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