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topic 17788

Kesternich test for copper/nickel plating

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I am working with a coat of copper/nickel, a thickness of 10 microns and 3 microns, without passivation. I know that Kesternich test is very aggressive for such finish but I have read that I can make this test with this finish using only 20ml of SO2, with this quantity I can see results. I normally work with a bottle of SO2 gas, introducing 0.2L or 2L in the Kesternich chamber, so I can't control with this bottle 20ml that is necessary for the test with a Copper/nickel coat. I read that it's possible to produce SO2 inside the chamber without gas, in another form.Is it possible?, How can I do it? Which are the compounds I need for and the quantities for 20ml?

Sonia Egiguren Aristizabal
- San Sebastian, Spain

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