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-----Anti-Tarnishing Agent For Copper and Brass Scouring Powder Cleaner
Q. I have formulated a Brass & Copper Scouring Powder Cleaner based on Silica Flour of 80 Mesh plus citric acid
⇦ on
eBay
or
Amazon [affil link] . After cleaning and wiping, black spots and tarnishing takes place within 24 hours of exposure to atmosphere. Can you suggest any anti-tarnishing agent for copper & brass and in what proportion to be added?
Please help.
Thanks.
CONSULTANT - THANE, MAHARASHTRA, INDIA
2005
A. There are more than a dozen successful "household name" brass & copper polishes in the U.S.A. You could pick your favorite and reverse-engineer it, or search through expired patents for formulations. My guess is that benzotriazole ⇦ on eBay or Amazon [affil link] would be helpful in your formulation. Good luck.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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A. DEAR MR. T.S. VISWANATHAN
ELECTROPLATING BRASS OR COPPER REQUIRES AN OVERCOAT OF ANTI TARNISH DIP.I HAVE USED A WATER SOLUBLE ONE WHICH GIVES A GOOD PLATING LIFE EVEN WITHOUT USING A FURTHER OVERCOAT OF LACQUER. IT IS AVAILABLE IN INDIA.
- New Delhi, INDIA
adv.
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