He Ting, Shi Wei, Xiang Song, Huang Chaowen, Ballinger Ronald G
College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, Guizhou University, Guiyang 550025, China.
Materials (Basel). 2021 Apr 7;14(8):1821. doi: 10.3390/ma14081821.
The influence of AlFeSi and MgSi phases on corrosion behaviour of the cast 6061 aluminium alloy was investigated. Scanning Kelvin probe force microscopy (SKPFM), electron probe microanalysis (EPMA), and in situ observations by confocal laser scanning microscopy (CLSM) were used. It was found that MgSi phases were anodic relative to the matrix and dissolved preferentially without significantly affecting corrosion propagation. The AlFeSi phases' influence on 6061 aluminium alloy local corrosion was greater than that of the MgSi phases. The corroded region width reached five times that of the AlFeSi phase, and the accelerating effect was terminated as the AlFeSi dissolved.
研究了AlFeSi相和MgSi相对铸造6061铝合金腐蚀行为的影响。采用扫描开尔文探针力显微镜（SKPFM）、电子探针微分析（EPMA）以及共聚焦激光扫描显微镜（CLSM）进行原位观察。结果发现，MgSi相相对于基体呈阳极，优先溶解，且对腐蚀扩展影响不大。AlFeSi相对6061铝合金局部腐蚀的影响大于MgSi相。腐蚀区域宽度达到AlFeSi相的五倍，随着AlFeSi相溶解，加速作用终止。
