About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2026
|
| Presentation Title |
Corrosion Response of As-Cast Mg–Er Alloys: Role of Er-Induced Intermetallics and Segregation |
| Author(s) |
Rashi Rajanna, Jayant Jain |
| On-Site Speaker (Planned) |
Rashi Rajanna |
| Abstract Scope |
We investigated the corrosion behavior of as-cast Mg–Er alloys (0.5–12 wt.% Er) in 3.5 wt.% NaCl to understand the role of Er-induced microstructural changes. FESEM-EDX and XRD analyses revealed increasing Er content promotes the formation of Er-rich intermetallic phases and microstructural refinement. Alloys with 0.5–5 wt.% Er showed better resistance to corrosion because they had a more even distribution of phases and created protective Er-oxide layers. In contrast, the Mg-10Er and Mg-12Er alloys had a lot of uneven distribution of elements and clumping of intermetallics, especially at the bottom where they were cast, which caused more galvanic corrosion. Potentiodynamic polarization and EIS confirmed significantly higher corrosion rates in these alloys. The research emphasizes the value of controlling Er distribution during solidification to enhance corrosion resistance in Mg–RE systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Characterization, Other |