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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.

RAJAGOPAL
Electromechanical switches - MADURAI, TAMILNADU, INDIA
2004

A. You can use Incralac [on eBay or Amazon] -special lacquer for copper and its alloys!

Goran Budija
- Cerovski vrh Croatia
2004

A. Why bother with Incralac [on eBay or Amazon] , when you can purchase the finest lacquers available?

Jake Koch
G. 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 Singh
Mohali, Punjab, India
2004

adv.

"Clearcoats/Lacquers for Brass from G.J. Nikolas"

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