About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
|
Symposium
|
12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
|
Presentation Title |
Galvanic Corrosion of AZX611 Magnesium Alloy / A6005C Aluminum Alloy Joint |
Author(s) |
Isao Nakatsugawa, Yasumasa Chino |
On-Site Speaker (Planned) |
Isao Nakatsugawa |
Abstract Scope |
Galvanic corrosion between AZX611 (Mg-5.9wt.%Al-0.6wt.%Zn-1.0wt.%Ca) magnesium alloy / A6005C (Al-0.4wt.%Mg-0.6wt.%Si-0.2wt.%Fe) aluminum alloy joint in differently concentrated NaCl solutions was evaluated. The galvanic current showed a maximum at the initial stage and then decreased with time. H2 gas evolution was observed on both surfaces, which was accelerated in higher NaCl concentration. The weight loss measurement revealed that galvanic corrosion damaged not only AZX611 but also A6005C due to the surface alkalization caused by the cathode reaction. The Scanning Vibrating Electrode Technique (SVET) detected numerous local anodes on the AZX611 surface, which gradually disappeared and were replaced with passive areas. It was concluded that the galvanic corrosion of the AZX611 / A6005C joint was controlled by the depassivation behavior of the AZX611 anode, in which the NaCl concentration was critical. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |