About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials and Chemistry for Molten Salt Systems
|
Presentation Title |
Acid/base Effects on Chromium Species in Molten Fluoride Salts |
Author(s) |
Haley Williams, Ruben Cho, Raluca O. Scarlat |
On-Site Speaker (Planned) |
Haley Williams |
Abstract Scope |
Chromium’s behavior in molten fluoride salts has been characterized by electroanalytical techniques and simulation studies due to its relevance to corrosion in molten salt systems such as solvent, coolant, and/or tritium breeding blanket systems in fission and fusion nuclear reactors. Previous studies have largely investigated LiF-NaF-KF mixtures and the disproportionation of Cr2+ to Cr3+ and Cr0, indicating the effect of solvent composition and solvation mechanism on the degree of stability of chromium species and, therefore, corrosivity. Solvent composition can be characterized by fluoroacidity, a measure of the activity of fluoride and an indicator of the degree of association and polymerization in the melt. Here, we present results of an experimental study to elucidate the relationship between acidity and corrosivity. The diffusivity of Cr2+ and Cr3+ in molten fluoride salts of various fluoroacidities are measured, compared to current literature, and analyzed within the context of solvation pathways and acid/base behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Other, Other |