| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Metal redox control in molten NaF-BeF2-UF4-ZrF4 salt for corrosion mitigation |
| Author(s) |
Woohyuk Lee, Amanda Leong, Jaewoo Park, Jinsuo Zhang |
| On-Site Speaker (Planned) |
Woohyuk Lee |
| Abstract Scope |
The study investigates the effect of metal redox control utilizing U and Be metals on the corrosion mitigation of stainless steel 316H in molten NaF-BeF2-UF4-ZrF4 salt at 704 ℃. The virtue of metal redox control is to generate UF3, which is thermodynamically more favorable for reacting with oxidizing agents rather than structural metals. UF4/UF3 ratios were determined through X-ray Photoelectron Spectroscopy (XPS), while the oxygen and hydrogen in the salts were characterized by Inert Gas Fusion analysis. It was found that the levels of oxygen and hydrogen in the salts decreased after metal redox control. Corrosion results showed that the depth of corrosion attack was mitigated in the metal redox-controlled salts. Especially, the lowest corrosion depth was observed in the Be metal redox-controlled salt. Therefore, the present study provides a methodology to improve the corrosion resistance of structural materials for molten salt reactors by tailoring redox potentials of corrosion reactions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Iron and Steel, Other |