copper corrosion protection

[GrizzlyRancher]

Hi,

I am fairly familiar with the use of anodizing/alodining aluminum surfaces to prevent corrosion, but are there similar processes for copper? I have 110-alloy electrical grade copper shims which I would like to treat, and the coating should be RoHS-compliant. Thanks in advance.

 

[unclesyd]

The only protective coating we used with Cu was Ni with copper gaskets and Ag with electrical components.

 

[CoryPad]

What environment? Cu is passive for many environments.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[GrizzlyRancher]

The copper shims are to be placed between MDR connectors and an alodined aluminum back plate inside a camera. EMI shielding is a requirement, so we are trying to prevent any loss of conductivity in the copper. As far as I'm aware, the camera is to be used in normal ambient indoor conditions.

 

[unclesyd]

Silver over Cu is quite common on electrical connections like the buss bars in substations. The conductivity actually will increase under certain conditions.

There a kits available from my electrical supply houses that can do small silver plating jobs for testing.

 

[strider6]

I know of tin plated copper to resist corrosion but i don't know if this can be applied in your case.
Try this source i think that can give you some good advise, it's the best source on copper on the web:

http://www.copper.org/applications/industrial/DesignGuide/tin03.html

http://www.copper.org/applications/industrial/DesignGuide/homepage.html

hope this can help u

S.

Corrosion Prevention & Corrosion Control