Fengyi Zhang , Lijun Zhang , Xueming Wei , Chunzhi Zhang , Qixiang Jia , Kai Sun , Dongtao Duan , Gong Li
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引用次数: 0
Abstract
The corrosion and passive behaviors of CoCrFeNiNbx (x = 0.3, 0.45, 0.6) high-entropy alloys with eutectic microstructures were studied in different electrolyte solutions (0.6 M NaCl, 0.6 M Na2SO4, and 0.6 M H2SO4). The potentiodynamic polarisation test showed that the pitting potential of Nb0.45 alloy reached 1.084V, and the alloy had the best corrosion resistance in Na2SO4 solution. Mott Schottky tests and X-ray photoelectron spectroscopy tests on the Nb0.45 alloy, and it was found that different film forming mechanisms in neutral and acidic solutions. A double-layer passivation film mainly composed of Cr(OH)3, Cr2O3, and Nb2O5 was formed. These studies provide basic theoretical reference for the preparation of new corrosion resistant high-entropy alloys.
研究了CoCrFeNiNbx （x = 0.3, 0.45, 0.6）高熵共晶合金在不同电解质溶液（0.6 M NaCl， 0.6 M Na2SO4和0.6 M H2SO4）中的腐蚀和钝化行为。动电位极化试验表明，Nb0.45合金的点蚀电位达到1.084V，在Na2SO4溶液中具有最佳的耐蚀性。对Nb0.45合金进行Mott Schottky测试和x射线光电子能谱测试，发现其在中性和酸性溶液中的成膜机理不同。形成了以Cr(OH)3、Cr2O3和Nb2O5为主的双层钝化膜。这些研究为制备新型耐腐蚀高熵合金提供了基础理论参考。
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