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Need Product to Remove Copper Oxidation

I'm a chemical engineering and I work with copper in my job. I need a copper cleaner, a product that removes the superficial oxidation in copper. I have used nitric acid, but the oxidation remain. Thanks

Marcelo Tirelli
- Lorena, Sao Paulo, Brazil
2001

2001

If you can handle HNO3 you can probably handle this solution:

120 g/L sodium persulphate

30 mL/L concentrated sulfuric acid

This is actually a copper etch; there will be metal removal and the resultant surface will be active. A benzotriazole [on eBay or Amazon] or citric acid [on eBay or Amazon] solution can prevent further tarnishing.

James Totter, CEF
- Tallahassee, Florida

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