AlCoCrFeNiCu高熵合金的电化学腐蚀性能研究

Study on Corrosion Properties of AlCoCrFeNiCu High Entropy Alloy in Different Media

利用电化学测试、扫描电镜观察及能谱分析等方法,研究了AlCoCrFeNiCu高熵合金在不同介质中的电化学腐蚀行为。结果表明,在3.5%NaCl和30%H2O2溶液中,1Cr18Ni9Ti不锈钢与AlCoCrFeNiCu高熵合金相比,具有较正的自腐蚀电位,较小的腐蚀电流密度,AlCoCrFeNiCu高熵合金的腐蚀以点蚀和局部腐蚀为主;在1 mol/L H2SO4溶液中,AlCoCrFeNiCu高熵合金的腐蚀电流密度较1Cr18Ni9Ti不锈钢小,耐腐蚀性能更好。

The corrosion behaviors of AlCoCrFeNiCu high entropy alloy in different media were investigated by electrochemical measurement,scanning electron microscopy（SEM） and energy dispersive spectrum（EDS）.The results show that,in 3.5%NaCl and 30%H2O2 solution,1Cr18Ni9Ti stainless steel exhibits higher pitting potential and lower current density compared with AlCoCrFeNiCu high entropy alloy.The major corrosion types are pitting corrosion and localized corrosion.But in 1 mol/L H2SO4 solution,AlCoCrFeNiCu high entropy alloy exhibits much better corrosion resistance than 1Cr18Ni9Ti stainless steel.