Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5439881 | Corrosion Science | 2017 | 18 Pages |
Abstract
The present work investigates the corrosion behaviour of machined AA7150-T651 aluminium alloy. It is found that machining operation introduces a near-surface deformed layer, characterized by ultrafine grains and segregation of Mg and Zn at grain boundaries, to the alloy. The near-surface deformed layer is electrochemically more active compared with the bulk alloy, therefore, is preferentially corroded during immersion in an 3.5Â wt.% sodium chloride solution acidified to pH 3.2. The open circuit potential of the machined alloy shows a transient at the beginning of immersion in the solution, due to the preferential dissolution of the near-surface deformed layer.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Bing Liu, Xinxin Zhang, Xiaorong Zhou, Teruo Hashimoto, Junjie Wang,