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Using Stainless Steel as an electrical ground





June 9, 2010

I have a large stainless steel plate that I want to ground using a copper lug. I am worried about the potential for strong galvanic action between active stainless and the copper grounding lug. Is it reasonable to use a cathode covering finish to cover the copper to prevent degradation of the stainless? I don't expect any galvanic action between passive stainless and copper, however I am still concerned that when under electrical currents the galvanic effect could be large, and could cause pitting in locations where the passive chromium finish on the stainless becomes compromised for one reason or another.

Any thoughts from the wealth of intelligence out there?

Joe Rendo
Student - Pittsburgh, Pennsylvania, USA


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