| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Development of an Electrochemical Phase Field Model for the Corrosion of Ni-Cr Alloys by Molten Fluoride Salts |
| Author(s) |
Chaitanya Vivek Bhave, Michael Tonks, David Andersson, Jake McMurray |
| On-Site Speaker (Planned) |
Chaitanya Vivek Bhave |
| Abstract Scope |
Corrosion of Ni-Cr alloys used for containment of molten salt is a major challenge in the commercial utilization of molten salt reactor (MSR) technology. In this work, an electrochemical phase-field model has been developed for predicting corrosion mass-loss rates and microstructure evolution of Ni-Cr alloys in molten salts. An electro-diffusion component was added to the Cahn-Hilliard equation to calculate component evolution, and a conserved current condition is solved to ensure electroneutrality in the system. Literature thermodynamic assessments and voltammetry data are used to inform the model thermodynamics and kinetics. Model verification has been performed to confirm that the reaction rates follow Butler-Volmer kinetics. Simulations of Ni-Cr alloy corrosion in molten LiF-BeF2 (FLiBe) are validated against experimental corrosion data. This work was performed using the Multiphysics Object-Oriented Simulation Environment (MOOSE), an open-source finite-element framework. The corrosion model developed in this work will be used to inform engineering-scale reactor models. |
| Proceedings Inclusion? |
Planned: |