Superior corrosion resistance of high-temperature Ir-Ni-Ta-(B) amorphous alloy in sulfuric acid solution

被引：31
作者：
Yang, Xiaodong [1 ,2 ,3 ]
Gao, Meng [2 ,3 ]
Liu, Yanhui [4 ]
Li, Jinlong [5 ]
Huang, Yan [2 ,3 ]
Wang, Gang [1 ]
Wang, Jun-Qiang [2 ,3 ]
Huo, Juntao [2 ,3 ]
机构：
[1] Anhui Polytech Univ, Anhui Key Lab High Performance Non Ferrous Met Ma, Wuhu 241000, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China
[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat, Ningbo 315201, Zhejiang, Peoples R China
[4] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[5] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Marine Mat & Related Technol, Zhejiang Key Lab Marine Mat & Protect Technol, Ningbo 315201, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 200卷
基金：
中国国家自然科学基金;
关键词：
Ir-based amorphous alloy; Corrosion resistance; Acid solution; Polarization; Passive films; BULK METALLIC-GLASS; POINT-DEFECT MODEL; BEHAVIOR; CR; TI; MECHANISMS; EVOLUTION; STRENGTH; GROWTH;
D O I：
10.1016/j.corsci.2022.110227
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, the corrosion behaviors and underlying mechanisms of high-temperature Ir-based amorphous alloys in an acidic solution were investigated systematically. The Ir-Ni-Ta-B amorphous alloy exhibits a crevice corrosion behavior with a superior corrosion resistance characterized by a low passive current density and a wide passive potential range. It is found that the high-exchange current density of H+ and H2 couple on the metalloid constituent can accelerate the active precipitation of passivation elements, leading to rapid formation of passive film. In sulfuric acid solutions, the formed passive film containing Ir, Ta5+ and Ni3+ oxides significantly increase the corrosion resistance.
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页数：12
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