Potential Dependence of Intergranular Corrosion Propagation in Sensitized Al-Mg Alloys
Abstract
Applied potential has been found to influence localized corrosion morphology in a wide range of aluminum alloys.[1-4] The concept of a potential window for intergranular corrosion (IGC) is often utilized to define the zone of IGC in IGC-susceptible materials.[2-5] In general, the IGC zone is usually the potential range between the breakdown potentials of the more anodic intermetallic phase and that of the matrix phase. In the case of Al-Mg alloys (AA5XXX), particularly AA5083, it was established that the range of potentials between the breakdown potentials of a sensitized AA5083 alloy and that of the more anodic β-phase precipitate (Al3Mg2) describes the potential window for IGC spreading.[5]
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 07, 2015
- Source ID
- 10.1149/ma2015-02/14/692
Entities
People
- David W. Ellis
- John R. Scully
- Mary Lyn C. Lim
- Robert G. Kelly
- Stewart C. Hahn