About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials and Chemistry for Molten Salt Systems
|
Presentation Title |
Fundamental Aspects of Chromium Corrosion in Molten Fluoride Salts |
Author(s) |
Ho Lun Chan, Elena Romanovskaia, Minsung Hong, Valentin Romanovski, Peter Hosemann, John Scully |
On-Site Speaker (Planned) |
Ho Lun Chan |
Abstract Scope |
An existing knowledge gap in the field of molten salt corrosion is the lack of in-situ, diagnostic and instantaneous corrosion measurements of corroding metallic system. Electrochemical techniques, such as linear polarization resistance and impedance spectroscopy (EIS), on molten salt systems have been extensively utilized by numerous investigators to bridge this gap; however, interpretation and discussion that address fundamental principles of electrode reactions and properties of the electrode-salt interface are underdeveloped. The objective of this work is to revisit the electrochemical corrosion behavior of pure Cr in molten FLiNaK salts at 600oC. A variety of electrochemical and materials characterization based measurements, including linear/cyclic voltammetry, EIS, potentiostatic polarization and high-temperature rotating disk electrode experiments were performed to gain insights on their rate-limiting steps and potential-dependent interfacial vs mass transport regimes. These results were coupled with examination of the post-corrosion interface and also consider the phase stability of fluoride salt species predicted using thermodynamic approach. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Other, |