Study on the Corrosion Behavior and Mechanism of CoCrNi Medium-Entropy Alloy in NaCl Solution with Various NaHSO3 Concentrations

被引：3
作者：
Xu, K. X. [1 ]
Zhu, M. [1 ]
Yuan, Y. F. [1 ]
Guo, S. Y. [1 ]
Chen, Y. B. [1 ]
机构：
[1] Zhejiang Sci Tech Univ, Sch Mech Engn, Hangzhou 310018, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2024年 / 33卷 / 20期
基金：
中国国家自然科学基金;
关键词：
corrosion behavior; MEA; metastable pitting; oxide inclusion; passive film; HIGH-STRENGTH STEEL; MILD-STEEL; PERFORMANCE; HYDROGEN; MICROSTRUCTURE; SO2; MG; POLARIZATION; STABILITY; SCC;
D O I：
10.1007/s11665-023-08747-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion resistance and passivation property of CoCrNi MEA in NaCl solution containing various concentrations of NaHSO3 were systematically investigated. The results reveal that the presence of HSO3- increases defects within the passive film, thins its thickness and disrupts the stability and integrity of the film. Increasing HSO3- concentration reduces the passivity of the MEA, facilitates the nucleation of metastable pitting and increases the tendency of metastable pitting to evolve into stable pitting, as well the corrosion rate increases significantly. Moreover, the corrosion of the MEA is aggravated by the micro-galvanic corrosion cells constituted between the substrate and the oxide inclusion. In addition, the MEA suffers a significant selective dissolution.
引用
收藏
页码：11151 / 11164
页数：14
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