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Copper plating on copper

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We have an application wherein 0.2mm thick copper plating has been recommended on copper rod before machining to tight tolerances and subsequently silver plating to 30-35 microns. This surface is used for current transfer and subjected to rubbing. I am not able to understand the reason for 0.2mm thick copper plating on copper. Can somebody explain ?

Rajiv Marwaha
- Kolkata, West Bengal, INDIA

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Rajiv

Possible reasons include

-Purity of plated copper and conductivity aspects.As opposed to the suspect purity of a cast Cu rod.

-Adhesion of silver to freshly plated copper is sometimes much better than to cast or machined copper.

- Sizing issues with the rod.

It is entirely possible to plate copper to the specified thickness from an acid copper bath after proper cleaning and de oxidising and activation.

Hope this helps.

Regards

Asif Nurie
Atlanta Global

New Delhi, India

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