Summary for anti tarnish for copper plating Discussion
Anti-tarnish for stain free copper plated surface is the core issue in this thread, where MK Prasad asks how to keep 5–10 micron copper-plated steel parts from staining after barrel plating and centrifugal air drying. He notes the parts are used in electrical applications such as contactors and circuit breakers, and the current process is cold rolled steel coils, stamping, alkaline copper plating, anti-tarnish coating, and drying. The only answer in the thread comes from Lyle Kirman, who says many people use benzotriazole as an anti-tarnish and corrosion inhibitor for copper and copper alloys, and suggests finding a local supplier. No alternative chemistries or process details are discussed, so the practical guidance is limited to benzotriazole as the commonly used option.
Q. Hi,
many copper components are replaced by copper plated steel components in most of electrical applications like contactors, circuit breakers, etc..
But it has become a tough task to get stain free copper plated surface. Coating thickness is 5 ~ 10 microns.
Any good anti tarnish to meet this.
The process: Cold Rolled steel coils – stamped – Alkaline copper plated(barrel) – Anti tarnish coated – Centrifugal Air drying
Many thanks in advance for your help
MK Prasad
Plating shop employee – Bangaluru, India
March 10, 2011
A. Many people use benzotriazole
⇦ on
or
Amazon [affil link]
as an antitarnish/ corrosion inhibitor for copper and copper alloys. You should be able to find a local supplier.
Lyle Kirman
consultant – Cleveland Heights, Ohio