| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
| Presentation Title |
Hot corrosion behavior of nickel-based superalloys in molten Na2SO4-MgSO4 salts |
| Author(s) |
Youyuan Zhang, Shanshan Hu, Yuying Wen, Ting Sun, Michael Teka, Xingbo Liu |
| On-Site Speaker (Planned) |
Youyuan Zhang |
| Abstract Scope |
Due to their excellent mechanical properties and corrosion resistance, nickel-based superalloys are extensively used in the aerospace and nuclear industry. However, the molten sulfate salts induced hot corrosion might significantly undermine the performance. To reveal the underlying mechanism, herein, various electrochemical methods including open circuit potential (OCP), electrochemical noise (EN), electrochemistry impedance spectroscopy (EIS) and potentiodynamic polarization (PDP), have been utilized to systematically investigate the hot corrosion behavior of three Ni-based alloys, i.e, Waspaloy, IN718 and IN100, in Na2SO4/MgSO4 eutectic molten sulfate salts at 700°C. With the aid of electrochemical study and post-mortem analysis, the mechanism, corrosion rate and type of corrosion are elucidated in detail. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, High-Temperature Materials, Other |