首页|Corrosion behavior of as-cast Al0.75CoFeCr1.25Ni high entropy alloy in 0.5 mol/L NaOH solution

Corrosion behavior of as-cast Al0.75CoFeCr1.25Ni high entropy alloy in 0.5 mol/L NaOH solution

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The corrosion behavior of an Al0.75CoFeCr1.25Ni high-entropy alloy(HEA)in 0.5 mol/L NaOH solution was investigated using a series of electrochemical and analytical techniques,including X-ray photoelectron spectroscopy,X-ray diffraction,scanning electron microscopy,potentiodynamic polarization measurement and electrochemical impedance spectroscopy.The results showed that the Al0.75CoFeCr1.25Ni HEA exhibited a typical columnar dendritic structure,which is composed of face-centered cubic,body-centered cubic(BCC),and ordered BCC phases(B2 phase).The corrosion resistance of this HEA in 0.5 mol/L NaOH solution is comparable to that of 304 SS,attributed to the change in the composition of the passive film formed on the surface.Although the passive film formed was generally rich in Al,the proportion of Cr2O3 inside it increased with the increasing immersion time,enhancing the stability of the passive film and thus improving the corrosion performance of this HEA in 0.5 mol/L NaOH solution.

High entropy alloyCorrosionElectrochemical behaviorX-ray photoelectron spectroscopyPassive film

Si-jia Nie、Xue-ning Yi、Hui-ling Zhou、Hao-jie Zhu、Lan-lan Yang、Fang-lian Fu、Jing-yong Li、Hao-kun Yang、Guo-xiang Xu、Sheng Lu、Yan-xin Qiao

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School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China

School of Nuclear Equipment and Nuclear Engineering,Yantai University,Yantai 264005,Shandong,China

Guangxi Liugong Machinery Co.,Ltd.,Liuzhou 545007,Guangxi,China

Smart Manufacturing Division(SMD),Hong Kong Productivity Council,Hong Kong 999077,China

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2024

10.1007/s42243-024-01180-y

钢铁研究学报(英文版)
钢铁研究总院

钢铁研究学报(英文版)

CSTPCD
影响因子：0.584
ISSN：1006-706X
年,卷(期)：2024.31(11)