Corrosion Fatigue Properties of Nickel-Containing Materials in Seawater (1258)

The corrosion-fatigue behaviour of a number of nickel-containing materials in seawater has been evaluated at the LaQue Centre for Corrosion Technology, W rightsville Beach, NC, U.S.A., using a technique involving smooth (unnotched) cantilever beam specimens rotating at 1450 rpm for a maximum duration of 100 megacycles (about 48 days). Evaluation has included nickel- and copper-base alloys, and some steels. Generally, test data suggest that a high ultimate tensile strength, high inherent pitting resistance, and a small grain size, are among the factors that give a high resistance to corrosion fatigue in seawater. Other main findings are that cathodic protection and flame-sprayed mild steel coatings improve the corrosion fatigue resistance of 18% Ni maraging steel, and that higher nickel content improves the corrosion fatigue resistance of cast bronze.

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