Cavitation erosion of the AA7050 aluminum alloy in 3.5 wt% NaCl solution-Part 1: mitigating effect by corrosion

被引：20
作者：
Pan, Cheng-Cheng [1 ]
Xia, Da -Hai [1 ]
Hou, Meng -Yang [1 ]
Qin, Zhenbo [1 ]
Xu, Yunze [2 ]
Behnamian, Yashar [3 ]
Hu, Wenbin [1 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China
[2] Dalian Univ Technol, Sch Naval Architecture & Ocean Engn, Dalian 116024, Peoples R China
[3] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
来源：
CORROSION SCIENCE | 2024年 / 232卷
基金：
中国国家自然科学基金;
关键词：
Negative synergistic effect; Cavitation erosion -corrosion; Stress concentration; AA7050; EBSD; TEM; OXIDE-FILM; BEHAVIOR; BRONZE; STEEL; COATINGS; COLLAPSE;
D O I：
10.1016/j.corsci.2024.112012
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion in 3.5 wt% NaCl solution caused a mitigated weight loss of the aluminum alloy 7050 (AA7050) under cavitation erosion condition. The mechanism was observed using high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electro back-scattered diffraction (EBSD), and potentiodynamic polarization. Both in deionized water and in 3.5 wt% NaCl solution, the cavitation erosion degradation of the AA7050 was mainly attributed to fatigue fracture like peeling off of surface layer materials. The corrosion significantly mitigated the weight loss of AA7050 under cavitation erosion condition because the loose surface oxide film (generated by corrosion) dissipated the cavitation impact energy and therefore alleviated the stress concentration on the alloy surface.
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页数：15
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