Cavitation erosion of the AA7050 aluminum alloy in 3.5 wt% NaCl solution-Part 2: an impedance investigation of the effect of cavitation intensity on interfacial states

被引：1
作者：
Pan, Chengcheng [1 ]
Behnamian, Yashar [3 ]
Guo, Yujie [1 ]
Qin, Zhenbo [1 ]
Hu, Wenbin [1 ]
Xia, Da-Hai [1 ]
Tribollet, Bernard [2 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China
[2] Sorbonne Univ, UMR 8235, CNRS, Lab Interfaces & Syst Electrochim LISE, Paris, France
[3] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
来源：
CORROSION SCIENCE | 2025年 / 251卷
基金：
中国国家自然科学基金;
关键词：
Cavitation erosion-corrosion; Cavitation intensity; Electrochemical impedance spectroscopy; Young model; Faraday impedance; Power law model; RESISTIVITY DISTRIBUTIONS; CORROSION; BEHAVIOR; FILMS; MAGNESIUM; BUBBLES; RATES;
D O I：
10.1016/j.corsci.2025.112936
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxide film is crucial for the cavitation erosion resistance of passive metals, such as aluminum (Al) alloys. However, the properties of the oxide film and the way cavitation intensity impacts its dissolution mechanism remain unclear. In this study, electrochemical impedance spectroscopy (EIS) was employed to investigate the corrosion mechanism of an AA7050 Al alloy under cavitation erosion-corrosion (CEC) conditions. Morphological alterations, the degree of surface lattice distortion, and the composition of the oxide film were characterized. The influence of the gap width between the vibratory horn and the stationary samples on the CEC mechanism was also discussed. A comprehensive model that is independent of the gap width and considers the presence of one adsorbed intermediate, Al+, for anodic dissolution is proposed to elucidate the corrosion of Al under CEC conditions.
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页数：17
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