| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Mechanistic Understanding of Molten Salt Corrosion Using Electron Paramagnetic Resonance |
| Author(s) |
James Matthew Kurley, Juho Lehmusto, Dino Sulejmanovic, James Keiser, Stephen Raiman |
| On-Site Speaker (Planned) |
James Matthew Kurley |
| Abstract Scope |
Mechanistic understanding of molten salt corrosion has focused on characterizing the alloy post-corrosion with minimal characterization of the salt. Previous studies quantified Cr concentration in the salt using optical emission spectroscopy or mass spectrometry, but those techniques only measure concentrations without giving any information on structure. X-ray absorption techniques can reveal structure but require the high-flux capabilities of a synchrotron. The present study seeks to complement previous research by characterizing rapidly quenched salt with electron paramagnetic resonance (EPR) to elucidate corrosion product structure within the salt. Chromium speciation was studied by dissolving CrOx, CrCly, and Cr metal into NaCl:MgCl2 (58:42) and KCl:MgCl2 (68:32) to determine baseline EPR spectra of a variety oxidation states and coordination environments. The EPR spectra were measured between 150 and 350K to reveal subtle differences between structures. The baseline spectra were compared to salt samples after corrosion experiments of both commercial and model alloys. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |