| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Electrochemical analysis and corrosion behavior of Ni-Cr alloy in molten LiCl-KCl |
| Author(s) |
Peyman Asghari-Rad, Nathan D. Smith, Sanghyeok Im, Hojong Kim |
| On-Site Speaker (Planned) |
Peyman Asghari-Rad |
| Abstract Scope |
The electrochemical behavior of chromium (Cr) species in eutectic LiCl-KCl molten salt was systematically explored at 723-823 K using cyclic voltammetry (CV). A three-electrode cell configuration was employed, including a glassy carbon working electrode, Ag/Ag+ reference electrode, and graphite counter electrode. The study focused on the Cr3+/Cr2+ and Cr2+/Cr(s) couples, which showed reversible Cr3+/Cr2+ and quasi-reversible Cr2+/Cr(s) transitions, respectively, based on the degree of changes in peak potentials as a function of scan rate. Utilizing these electrochemical behavior, the diffusivity of Cr(II) ions was calculated at 723-823 K and the electrochemical stability of each valent state (Cr0, Cr2+, and Cr3+) was delineated. The corrosion behavior of Ni-Cr alloy at 773 K was further investigated based on the electrochemical stability of Cr species in molten LiCl-KCl salt, in complement with post-mortem characterization of the Ni-Cr alloys under a controlled potential to gain insight into corrosion mechanism in molten salts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Electrometallurgy, Characterization, Other |