Best Plating to Inhibit Welding

[cbert]

I have two small brass parts that are being used in a switching device. Current is about 5 amps for 30 milliseconds. When the parts are unplated I can get a very slight welding action as witness under a scope. Worst case is the parts stick together due to the minute weld. Can anyone suggest a plating material and thickness for both parts that would be the best guard againt the parts welding together.

 

[NickE]

There are silver alloys for exactly this application. I forget their names though. Try electrical contact alloys as a google search. They commonly are added to the structural component as pads or buttons.

 

[arunmrao]

I am providing a link for silver alloy manufacturer. These contacts are used in molded circuit breakers.

http://www.metalor.com/en/electrotechnics/silver-alloys/silver-alloys.asp