| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Metals and Alloys Corrosion in Unpurified Molten FLiNaK Salt: Development and Evaluation of Electrochemical Methods |
| Author(s) |
Elena Romanovskaia, Ho Lun Chan, Valentin Romanovski, Francisco Garfias, Minsung Hong, Sara Mastromarino, Raluca Scarlat, Peter Hosemann, John R. Scully |
| On-Site Speaker (Planned) |
Elena Romanovskaia |
| Abstract Scope |
An in situ, multi-electrode method was developed to provide temporal information regarding the corrosion processes and rates of freely-corroded metals/alloys in unpurified molten FLiNaK salt using the corroborating simultaneous application of several techniques. Cyclic voltammetry, galvanostatic hold, and square wave voltammetry were employed to screen for possible impurities and to detect and assay cations by their redox reactions in molten salt. A variety of in situ electrochemical methods (electrochemical impedance spectroscopy, static immersion exposure, cyclic voltammetry) were used to assess corrosion rates in the presence of these impurities. The exposure of Cr in FLiNaK at 600oC was selected as a model system for investigation and was further extended to other metals/alloys (Ni, NiCr). This work reports the possibility of using the electrochemical techniques described above for instantaneous determination of metals’/alloys’ corrosion rates when exposed to 600oC FLiNaK for 50 h. The results, challenges, and limitations of each method are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Nuclear Materials, Copper / Nickel / Cobalt |