Effect of Si on the corrosion resistance of AlZrNbTi lightweight refractory high-entropy alloys in acidic environment

被引：15
作者：
Chang, Yue [1 ,2 ,3 ]
Cheng, Hongxu [1 ,2 ]
Jin, Xianzhe [1 ,2 ]
Li, Zejun [1 ,2 ]
Zhao, Qiancheng [1 ,2 ]
Wang, Xuefei [1 ,2 ]
Luo, Hong [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Natl Mat Corros & Protect Data Ctr, Beijing 100083, Peoples R China
[2] Minist Educ MOE, Key Lab Corros & Protect, Beijing 100083, Peoples R China
[3] Univ Sci & Technol Beijing, BRI Southeast Asia Network Corros & Protect MOE, Shunde Innovat Sch, Foshan 528399, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 238卷
基金：
中国国家自然科学基金;
关键词：
High-entropy alloy; Si content; Passive film; Electrochemical behavior; HNO(3)solution; NITRIC-ACID; MECHANICAL-PROPERTIES; BEHAVIOR; SURFACE; MICROSTRUCTURE; OXIDATION;
D O I：
10.1016/j.corsci.2024.112377
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study investigated the effect of Si content on the corrosion behavior of AlZrNbTiSix x (x=0, =0, 0.3, 0.6, 1.0 at%) lightweight refractory high-entropy alloys in a 1 M HNO3 3 solution. The results showed a transformation in the microstructures of AlZrNbTiSix x from a single BCC phase (x=0) =0) to a BCC matrix phase with Zr5Al3 5 Al 3 hexagonal precipitated phases (x=0.3, =0.3, 0.6, 1.0). AlZrNbTiSi0.6 0.6 exhibited the best corrosion resistance, attributed to the addition of Si promoting the growth of continuous and dense oxides. Microgalvanic corrosion affected the formation of the oxide film, triggering an excessive amount of Si worsening the stability of the passive film.
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页数：11
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