Corrosion resistance of (FeCoNiCr)100-xMnx high entropy alloys in NaCl and NaOH solutions

doi:10.13251/j.issn.0254-6051.2022.05.006

Abstract

Abstract: Microstructure and corrosion resistance in NaCl and NaOH solutions of the (FeCoNiCr)_100-xMn_x(x=4,8,12,20) high entropy alloys prepared by spark plasma sintering were studied. The results show that (FeCoNiCr)_100-xMn_x alloys are mainly composed of FCC single phase structure and a small amount of BCC phase. (FeCoNiCr)₈₈Mn₁₂ alloy has the best corrosion resistance in 3.5wt%NaCl solution. The addition of Mn enhances the corrosion resistance of the alloy in 1 mol NaOH solution. Annealing has little effect on corrosion resistance of the alloy in 1 mol NaOH solution. The corrosion resistance of the (FeCoNiCr)_100-xMn_x alloys in 3.5wt%NaCl solution and 1 mol NaOH solution is better than that of the 304S stainless steel.

Key words: CoCrFeNiMn_x high entropy alloys, spark plasma sintering, microstructure, corrosion resistance

CLC Number:

TG172

Zhao Kun, Jiang Peng, Wang Huhu, Wang Bo, Wang Peijin, Yang Xingzhong. Corrosion resistance of (FeCoNiCr)_100-xMn_x high entropy alloys in NaCl and NaOH solutions[J]. Heat Treatment of Metals, 2022, 47(5): 40-46.

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Corrosion resistance of (FeCoNiCr)_100-xMn_x high entropy alloys in NaCl and NaOH solutions

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