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Abstract
The FeCoNiCuSnx alloys with different Sn contents are prepared, the microstructure and the corrosion behaviour of the alloys are investigated. When Sn content is lower than 0.09, FeCoNiCuSnx alloys consist of a single FCC phase. While Sn content of the alloy is 0.09, a small quantity of BCC structure is present. The FeCoNiCuSnx alloys have a wider passive region in the NaOH solution. FeCoNiCuSnx alloys exhibit a better corrosion resistance in NaCl solution than 304 stainless steel, the corrosion resistance of FeCoNiCuSn0.04 alloy is best among all the alloys. The corrosion resistance of FeCoNiCuSnx alloys in NaOH solution is lower than that of 304 stainless steel, the corrosion resistance of FeCoNiCuSn0.03 alloy is best among all FeCoNiCuSnx alloys.