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采用真空电弧熔炼法制备FeCrNiMnMo0.1高熵合金，通过X射线衍射仪和扫描电子显微镜等对合金进行表征，研究了退火时间和温度对合金显微结构及耐腐蚀性能的影响。实验结果表明：退火后合金形成了FCC相和σ相结构；退火时间和温度对σ相的抑制效果不同，700℃下退火5 h的FeCrNiMnMo0.1合金σ相面积占比最小，耐蚀性最好。在模拟水电解池工作环境中的电化学测试结果显示，700℃下退火5 h的FeCrNiMnMo0.1合金自腐蚀电位为-0.272 V,自腐蚀电流密度为1.95×10-4 A/cm2,相较于铸态合金，其耐蚀性显著提高，且在24 h的0.6 V(vs.SCE)恒电位极化下保持电化学稳定，表现出其作为质子交换膜(PEM)电解水制氢双极板的应用潜力。
Abstract：FeCrNiMnMo0.1 high-entropy alloy was prepared by vacuum arc melting and characterized by X-ray diffractometer and scanning electron microscope.And the effects of annealing time and temperature on the microstructure and corrosion resistance of the alloy were studied.The experimental results show that the FCC phase and σ phase structures are formed after annealing.The inhibition effect of annealing time and temperature on σ phase is different.The alloy annealed at 700 ℃ for 5 h has the smallest σ phase area and the best corrosion resistance.The electrochemical test results in the simulated working environment of the water and electricity solution pool show that the self-corrosion potential of FeCrNiMnMo0.1 alloy annealed at 700 ℃ for 5 h is-0.272 V,and the self-corrosion current density is 1.95×10-4 A/cm2,which significantly improves the corrosion resistance compared with the cast alloy.Moreover, SCE remained electrochemically stable under potentiostatic polarization of 0.6 V(vs.SCE)for 24 hours, showing its potential application as a bipolar plate for hydrogen production from water electrolysis by proton exchange membrane.
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基本信息:
中图分类号:TG139;TG156
引用信息:
[1]魏世星,刘玮,黄乃宝,等.热处理对FeCrNiMnMo_(0.1)高熵合金双极板的导电性和耐蚀性能影响[J].沈阳理工大学学报,2025,44(02):61-66+72.
基金信息:
国家重点研发计划项目(2022YFB4002102)
2025-02-26
2025-02-26