Influence of Aging on Corrosion Behaviour of the 6061 Cast Aluminium Alloy

• Main Authors: He, Ting (Author), Shi, Wei (Author), Xiang, Song (Author), Huang, Chaowen (Author), Ballinger, Ronald G. (Author)
• Format: Article
• Language: English
• Published: Multidisciplinary Digital Publishing Institute, 2021-10-27T18:09:17Z.
• Subjects: Article
• Online Access: Get fulltext

The influence of AlFeSi and Mg₂Si 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 Mg₂Si 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 Mg₂Si phases. The corroded region width reached five times that of the AlFeSi phase, and the accelerating effect was terminated as the AlFeSi dissolved.