Corrosion behaviors and mechanism of AlxCrFeMnCu high-entropy alloys in a 3.5 wt% NaCl solution

被引：57

作者：

Feng, Li ^{[1
,2
]}

Yang, Yang ^{[1
]}

Zhao, Yanchun ^{[1
,2
]}

Ma, Kai ^{[1
]}

Cui, Junpeng ^{[1
]}

机构：

[1] Lanzhou Univ Technol, Sch Mat Sci & Technol, Lanzhou 730050, Peoples R China

[2] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China

来源：

CORROSION SCIENCE | 2024年 / 233卷

关键词：

High -entropy alloys; Microstructure; Corrosion behavior; Passive film; XPS; POINT-DEFECT MODEL; STAINLESS-STEEL; PASSIVE FILMS; ELECTROCHEMICAL CHARACTERIZATION; ELECTRONIC-PROPERTIES; MICROSTRUCTURE;

D O I：

10.1016/j.corsci.2024.112087

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigated the corrosion behavior of as-cast AlxCrFeMnCu (x = 0, 0.5, 1.0, 1.5, 2.0) high-entropy alloys (HEAs) in a 3.5 wt% NaCl solution at room temperature. The results indicated that the corrosion resistance of the AlxCrFeMnCu HEAs decreased with increasing Al content. Intergranular corrosion was the primary corrosion type for CrFeMnCu and Al0.5CrFeMnCu HEAs, while Al1.0CrFeMnCu, Al1.5CrFeMnCu, and Al2.0CrFeMnCu HEAs exhibited selective corrosion with enrichment of Al and Cu in the BCC2 phase. The XPS fitting calculations indicated that an increase in the molar ratio of Al led to a decrease in Cr2O3 content and an increase in Al2O3 content, which weakened the stability and protective properties of the passive film.

引用

页数：13

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