About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Corrosion of Advanced Materials: Theory and Practice
|
| Presentation Title |
Electrochemical Characteristics of Second Phases in 6xxx Series Aluminum Alloys |
| Author(s) |
Ankur Kumar, I-Wen Huang, Mary Lyn Lim, Gerald S. Frankel |
| On-Site Speaker (Planned) |
Ankur Kumar |
| Abstract Scope |
The study examines the electrochemical behavior of second phases in 6xxx series aluminum alloys subjected to various environments. It emphasizes how phase chemistry and exposure environment influence electrochemical characteristics. Both α and β phase show more noble potentials than the matrix phase in acidic and neutral solutions, with a large potential difference in neutral solutions leading to intense interfacial attack. In basic solutions, interfacial attack is primarily governed by cathodic kinetics. The Q-phase remains passive in all exposure environments but has a lower pitting potential than the matrix phases, while the Mg2Si phase passivates only in basic conditions, showing different corrosion behavior across the environments. |