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Cleaning up copper sulphate residue

We use copper sulphate ⇦ on eBay or Amazon [affil link] in a simple continuity tester. Since copper sulphate is conductive we use it to test continuity of 20-36 ga. magnet wire without having to burn the insulation off. Is copper sulphate corrosive to paint or metals? When copper sulphate if left to dry, it leaves a corrosive looking residue. Do you recommend any type of cleaning agent to completely remove this buildup?

Thanks,

Chris Follis
A.O.Smith - Ripley, TN

Just not a good idea to leave salts around any metal. A copper sulphate solution will corrode many metal surfaces, since it has some water of hydration, and will probably absorb more from the atmosphere. It is slightly acid.

Tom Pullizzi
Falls Township, Pennsylvania

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