| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
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| Presentation Title |
Tracking Chemical Evolution of Cr Ions in Molten LiCl-KCl Salts via In Situ X-ray Absorption Spectroscopy
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| Author(s) |
Yuxiang Peng, Ankita Mohanty, Kaifeng Zheng, Denis Leshchev, Bobby Layne, Ellie Kim, Phillip Halstenberg, Sheng Dai, James F. Wishart, Anatoly I. Frenkel , Yu-chen Karen Chen-Wiegart |
| On-Site Speaker (Planned) |
Yuxiang Peng |
| Abstract Scope |
LiCl-KCl eutectic molten salt is widely used in concentrated solar power, molten salt reactors, pyrochemical reprocessing, and electrorefining. However, chromium in the containment alloys can cause undesirable corrosion and material degradation with LiCl-KCl. The corrosion mechanism remains unclear, partly due to the unknown evolution of Cr species in molten salt. In this work, the chemical stabilities of CrCl2, CrCl3, and Cr2O3 in LiCl-KCl eutectic molten salt at elevated temperatures were investigated with in situ X-ray absorption spectroscopy. Results indicated that CrCl3 and Cr2O3 were stable while CrCl2 was oxidized by impurities. The chemical evolution of Cr with NiCl2 in LiCl-KCl molten salt at high temperatures was also examined, revealing Cr initially reacted with Ni2+ forming as Cr2+, and further oxidized by impurities. These findings are essential for understanding the corrosion mechanism of Cr in molten salt and further improving the stability of containment alloys in molten salt applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |