Corrosion Properties of Rapidly Solidified Copper Base Alloys for Marine Service

摘要

Copper base alloys are used in marine applications requiring a combination of high strength and corrosion resistance. In an effort to improve the performance of some selected copper base alloys, rapid solidification has been used to refine the microstructures and enhance solid solubilities. For this study, 90/10 CuNi, 70/30 chromium modified CuNi, 70.30 niobium modified CuNi and NiAl bronze alloys were rapidly solidified by meltspinning. A 90/10-8% Fe CuNi was similarly prepared. The corrosion behaviour of the rapidly solidified alloys was compared to conventionally processed ones with similar compositions, using electrochemical techniques. It was found that the general corrosion resistance of the rapidly solidified alloys was as good as or better than the conventionally processed material, and that the rapidly solidified alloys may even be better under erosion/corrosion conditions. Keywords: Physical properties; Corrosion resistant alloys. (kt)