About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials and Chemistry for Molten Salt Systems
|
Presentation Title |
O-3: Detection of Transition Metals in Solid and Molten Salts Using UV-Vis Spectra |
Author(s) |
Diego J. Macias, Stephen S. Raiman, Dino Sulejmanovic |
On-Site Speaker (Planned) |
Diego J. Macias |
Abstract Scope |
Molten salt reactors (MSRs) require materials that can withstand molten salt environments. During salt exposure, the corrosion of alloys proceeds by extraction of the alloying elements from the alloy surface into the liquid salt. Being able to detect and monitor the alloying elements in molten salts could be used as an in-situ measure of corrosion. Fluoride and chloride-based molten salts are transparent in the visible spectrum which allows for the detection of light-absorbing species such as transition metal impurities using UV-Vis spectroscopy. Our preliminary work compared the difference between absorbance spectra of pure salts and the salts with various concentrations of either Fe2+, Cr2+ or Ni2+ cations as a baseline. These baseline spectra allowed for quantification of Fe2+, Cr2+ and Ni2+ in molten chloride salt after a 316H specimen exposure. In addition, the correlation between the concentrations in the salt and the extent of corrosion of 316H specimens was determined. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Characterization, High-Temperature Materials |