| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2025
|
| Presentation Title |
Influences of Sn alloying on the corrosion behavior and morphology of a Mg-3Al-1Zn-0.4Mn alloy |
| Author(s) |
Caini Liu, Yang Yang, Yangchao Deng, Wei Sun, Yonghong Zhang, Ruifeng Zhang, Guang Zeng |
| On-Site Speaker (Planned) |
Caini Liu |
| Abstract Scope |
Magnesium alloys remain growing interest due to high specific strength and low density. However, inadequate corrosion resistance of magnesium alloys has restricted their application. Alloying is an effective way to inhibit the corrosion of magnesium alloys. Mg-Sn alloys exhibit excellent mechanical properties comparable with RE-containing magnesium alloys. In this study, Mg-4Sn-3Al-1Zn-0.4Mn alloy were investigated in reference to Mg-3Al-1Zn-0.4Mn alloy, aiming to clarify the role of Sn alloying in the corrosion performance at the microstructural level. The surface corrosion morphology of the alloys was observed for immersion tests, using X-ray Micro-Computed Tomography (XRM-CT) and analytical scanning electron microscopy (SEM). The corrosion performance was also measured using hydrogen evolution and electrochemical tests. The results indicate that the corrosion rates of Mg-4Sn-3Al-1Zn-0.4Mn is ~2-3 times higher than that of Mg-4Al-1Zn-0.4Mn, as measured by both hydrogen evolution test and electrochemical tests. Corrosion morphology observation shows that the Mg-4Al-1Zn-0.4Mn mainly exhibits uniform corrosion, while the Mg-4Sn-3Al-1Zn-0.4Mn shows local corrosion. Mg2Sn particles and Sn segregation within 𝛼-Mg dendrites play an important role in appearance of local corrosion. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Characterization, Other |