| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
How Solute Atoms Control Aqueous Corrosion of Al-Alloys |
| Author(s) |
Huan Zhao |
| On-Site Speaker (Planned) |
Huan Zhao |
| Abstract Scope |
Aluminum alloys play an important role in circular metallurgy due to their good recyclability and 95% energy gain when made from scrap. The durability of Al alloys stems from the dense barrier oxide film, preventing further degradation. However, despite decades of research, the individual elemental reactions and their influence on the nanoscale characteristics of the oxide film during corrosion in multicomponent Al alloys remain unresolved questions. Here, we build up a direct correlation between the near-atomistic picture of the oxide film and the solute reactivity in the aqueous corrosion of a high-strength Al-Zn-Mg-Cu alloy. We reveal the formation of nanocrystalline Al oxide and highlight the solute partitioning between the oxide and the matrix. Through H isotopic labelling with deuterium, we provide direct evidence that the oxide acts as a trap for this element. Our findings advance the mechanistic understanding of further improving the stability of Al oxide. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Environmental Effects, Sustainability |