About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Impact of Surface Finish on Molten Salt Corrosion of a Ni-30Cr Alloy |
| Author(s) |
Konnor Walter, Jagadeesh Sure, Adrien Couet, Emmanuelle Marquis |
| On-Site Speaker (Planned) |
Konnor Walter |
| Abstract Scope |
Molten salt corrosion literature has identified grain refinement and cold working as important variables impacting the kinetics of corrosion. However, the mechanisms behind the potential impact of the starting alloy microstructure on the corrosion response have not been elucidated. A Ni-30at%Cr alloy was prepared with two different surface finishes (electropolished versus ground using 240 grit sandpaper) and then exposed to LiCl-KCl-2 wt %EuCl3 for 96 hours at 500 °C. The electropolished surface suggested a surface reaction with no subsurface porosity or subsurface Cr depletion. DIGM was evident at grain boundaries with pure Ni grains decorating the grain boundaries. The ground sample revealed the formation of a thick layer consisting of large pores and pure Ni with evidence of recrystallization. The extreme differences in the corrosion response highlight the importance of considering surface preparation and microstructure when predicting corrosion behavior. |
| Proceedings Inclusion? |
Planned: |