About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advancements in Molten Salt/Metal Technology in Energy Applications: From Atoms to Plants
|
| Presentation Title |
Testing Reference Electrodes in FLiNaZr Molten Salt |
| Author(s) |
Padma Krishnakumar, Michael Simpson, Michael Clegg, Jim Steppan, Tom Meaders, Byron Millet |
| On-Site Speaker (Planned) |
Padma Krishnakumar |
| Abstract Scope |
Building stable, thermodynamic reference electrodes compatible with molten fluoride salts has long been an unsolved problem, due to their corrosivity towards commercially used glass/ceramic membranes. An experimental fluoride salt reference electrode developed by HiFunda LLC, that features a proprietary metallic membrane was tested for its stability in molten U-FLiNaZr (UF4-LiF-NaF-ZrF4) at temperatures ranging from 550-750°C. Ni/NiF2 and Fe/FeF2 redox couples were tested in the high temperature reference electrode (HTRE) with continuous long-term immersion in the salt (7-21 days). Electrochemical analysis methods included open circuit potentiometry (OCP), electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), and cyclic voltammetry (CV). Salt samples were taken to measure corrosion product concentration using inductively coupled plasma mass spectroscopy (ICP-MS). Potential stability will be reported for different redox couples and temperatures. |