
plating, anodizing, & finishing Q&As since 1989
-----
Tarnishing on copper plating
October 14, 2008
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 16, 2008
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
December 11, 2008
1.I have found in the web that TOLYTRIAZOLE & BENZOTRIAZOLE 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
Q, A, or Comment on THIS thread -or- Start a NEW Thread