AFS Library

MARINE CORROSION OF A WHITE COPPER-BASE ALLOY WITH ZINC, MANGANESE, NICKEL AND ALUMINUM

19740255
Journal: AFS Transactions 1973, p. 471-474
Author: R. F. Schmidt, F. L. Riddell, and H. Kramer

A study was made to learn the corrosion resistance in sea water of a white copper-base alloy with zinc, manganese, nickel and aluminum toward potential use in marine castings for sea water service including propellers. These tests show that this new alloy family behaved similar to manganese bronze in short term velocity tests. Nickel aluminum bronze had better velocity corrosion resistance than any of the alloys tested. In the quiet sea water testing program, the regular low aluminum formula (Alloy A) displayed the best overall corrosion resistance. The manganese bronze alloy showed dezincification and the nickel aluminum bronze alloy suffered widespread pitting and crevice corrosion.



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