| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
The Effect of Temperature on the Dealloying Behavior of Binary Ni-20Cr Alloy in Molten FLiNaK |
| Author(s) |
Harjot Singh, Ho Lun Chan, Elena Romanovskaia, Valentin Romanovski, Minh Tran, John Scully |
| On-Site Speaker (Planned) |
Harjot Singh |
| Abstract Scope |
In high-temperature Generation IV molten salt reactors (MSRs), the operational integrity of structural materials is critical. Understanding the susceptibilities to both corrosion and irradiation-induced corrosion is of significant interest. FLiNaK, a eutectic LiF-NaF-KF blend, is a leading coolant choice, and structural materials must endure the operating temperature range of 600–700 °C within the MSR cooling loop. Previous studies on Ni-Cr and Fe-Cr alloys in molten chlorides have revealed temperature-dependent corrosion phenomena such as uniform corrosion, grain boundary attack, and bicontinuous dealloying. However, these phenomena, while anticipated, have not been investigated in molten fluorides considering homologous temperature effects. This study examines the corrosion behavior of a model binary Ni-20Cr (wt. %) alloy in unpurified molten FLiNaK over a temperature range of 500 to 700 °C under a constant electrochemical potential. Post-test surface and cross-sectional analyses were performed using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Temperature Materials, Other |