| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Corrosion Behavior of SS316, Hastelloy X, and Hastelloy N in FLiNaK |
| Author(s) |
Amanda Leong, Huali Wu, Jinsuo Zhang |
| On-Site Speaker (Planned) |
Amanda Leong |
| Abstract Scope |
Fluoride salts are promising salt coolants for molten salt reactors; therefore, the need to search for a suitable material that is compatible in FLiNaK environments is essential to minimize corrosion. This work addresses the corrosion behavior of SS316, Hast. X, and Hast. N exposed in FLiNaK at 750°C for up to 336 hours. Initial oxidation results show that chromium oxide forms on material surfaces; however, the oxide is chemically unstable as the reaction favors the formed chromium oxide to dissolve into FLiNaK as ions eventually. As chromium migrates from the bulk to the surface, the continuation of chromium dissolution in FLiNaK led to severe depletion as many pits were formed, affecting the material's integrity. The depletion depth of chromium increases significantly with exposure times. The chromium depletion depth of Hast. X was much more profound in comparison to Hast. N, due to its higher chromium concentration from the bulk material. |
| Proceedings Inclusion? |
Planned: |