The effect of changes of nickel and molybdenum concentration of 18% chromium stainless steel were evaluated in a galvanic test couple. Couples of the same melt of metal as well as disimilar couples were tested. It was found that there was no appreciable gain in galvanic corrosion resistance with nickel contents ranging from 9 to 15%. With 15% nickel and molybdenum contents ranging to 4%, an appreciable improvement was noted with increase in molybdenum concentration. Corrosion currents should be expected when any pair of samples is tested, even those from the same melt.

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© 1974 National Association of Corrosion Engineers
1974
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