Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Preventing Brass/Copper Contacts from Tarnishing
Q. We are the Micro switches manufacturer facing the problem of Tarnish on Brass/Copper components. To avoid Tarnish, we have planned to do for Lacquer coating over the terminals before Blanking. I would like to know the suitable cost effective and better performance lacquer material, supplier name, Cost, Coating thickness and coating method. Please help.
RAJAGOPALElectromechanical switches - MADURAI, TAMILNADU, INDIA
2004
A. You can use Incralac ⇦this on eBay or Amazon [affil links] -special lacquer for copper and its alloys!
Goran Budija- Cerovski vrh Croatia
2004
A. Why bother with Incralac ⇦this on eBay or Amazon [affil links] , when you can purchase the finest lacquers available?
Jake KochG. J. Nikolas &Co.,Inc.
Bellwood, Illinois
2004
A. Mr Rajagopal,
Have you considered Chemical Passivation of a Non Chromate variety. These enhance the life and prevent corrosion, and are conductive, unlike the lacquers. There are a number of Copper and Brass anti-tarnish chemical dips available.
Regards,
Asif Nurie [deceased]
- New Delhi, India
With deep regret we sadly advise that Asif passed away on Jan 24, 2016
2004
A. I agree with Asif. Since the components are electrical contacts, they need to be electrically conducting. A lacquer coating will give an insulating layer.
Cheers.
Gurvin SinghMohali, Punjab, India
2004
"Clearcoats/Lacquers for Brass from G.J. Nikolas"
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