| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
In-situ Synchrotron X-Ray Absorption Spectroscopy of Ni-20Cr and High-Entropy Alloys Molten Salt Corrosion |
| Author(s) |
Adrien Couet, Kailee Buttice, Jagadeesh Sure, Changkyu Kim, Shea McCarthy, Karen Chen-Wiegart, Bobby Lane, Bruce Ravel |
| On-Site Speaker (Planned) |
Adrien Couet |
| Abstract Scope |
The recent use of in-situ synchrotron radiation to investigate the corrosion mechanism of Ni-based alloys is discussed. Novel experimental setups for corrosion and standard cells compatible with in-situ synchrotron X-Ray characterization are presented. X-Ray Absorption and Fluorescence results for a model Ni-20Cr alloy corrosion in xKCl-(1-x)MgCl2 are analyzed, focusing on salt chloro-acidity's effect on corrosion kinetics. EuCl3 is added to measure oxidation kinetics, with Eu cations ratio monitored via Eu XANES signal. Ni and Cr content in the salt is tracked by in-situ XRF, and corrosion product structure by EXAFS. Corrosion kinetics of five FeCrMnNi High-Entropy Alloys (HEAs) are measured in-situ, selected from a previous high-throughput molten salt corrosion study of 150 HEAs. Machine learning-informed data analytics have shown Ni surface diffusion coefficient is crucial for controlling corrosion kinetics. The effect of Ni surface diffusion coefficient on corrosion in LiCl-KCl is discussed, providing new insights into molten salt corrosion mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Entropy Alloys, Environmental Effects |