Influence of Retrogression and Re-aging on the Exfoliation Corrosion Behavior of AA 7085 Sheets
- Resource Type
- Article
- Authors
- V. S. Raja; Ajay Krishnan; A. K. Mukhopadhyay
- Source
- CORROSION SCIENCE AND TECHNOLOGY, 15(4), pp.159-165 Aug, 2016
- Subject
- 금속공학
- Language
- English
- ISSN
- 2288-6524
1598-6462
An attempt has been made to understand the influence of retrogression and re-aging (RRA) on the exfoliationcorrosion behaviour of AA 7085 alloy in comparison with the peak aged condition (PA). Immersion testsusing ASTM G34 and studies involving electrochemical impedance spectroscopy showed that the RRA treatedalloy provided higher resistance to exfoliation corrosion than the PA treated alloy. The improved resistancewas attributed to the enhanced Cu content and the discontinuous nature of the grain boundary precipitate,which was revealed through transmission electron microscopy.