| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Investigation of structural alloy corrosion in molten salt – mesoscale modeling of electrochemical experiments |
| Author(s) |
Xueyang Bognarova, Nathan Bieberdorf, Mark Asta, Laurent Capolungo |
| On-Site Speaker (Planned) |
Xueyang Bognarova |
| Abstract Scope |
The molten salt reactor is a promising technology due to its inherent safety features and high temperature operation resulting in improved thermodynamic efficiency. Structural material corrosion by molten salt is a major concern, which couples redox species transport, electron transfer, and interfacial double-layer mechanisms. Experimental techniques such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) reveal the reaction mechanisms in an electrochemical system. In this work, a phase-field model has been developed to simulate CV and EIS in a molten salt system where metal dissolves/deposits upon an applied potential. The model couples the faradaic and capacitive current without explicitly modeling the double-layer structure. The molten salt thermodynamic database is leveraged. After verification, the electrochemical model is applied to simulate the corrosion of Ni-Cr alloy exposed to molten salt, including the corrosion rate and morphology. This study also provides insight into the rate-limiting corrosion mechanism. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Nuclear Materials, Modeling and Simulation |