About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Redox-Driven Transition from Selective Dissolution to Penetrating Corrosion in Molten FLiBe |
| Author(s) |
Weiyue Zhou, Aaron De Leon, Nayoung Kim, Guiqiu (Tony) Zheng, Michael P. Short, Kevin B. Woller |
| On-Site Speaker (Planned) |
Weiyue Zhou |
| Abstract Scope |
Molten FLiBe is a leading candidate coolant for advanced fission systems and tritium-breeding medium for fusion blankets, yet its corrosion mechanisms remain insufficiently resolved. Compared with extensively studied molten salts such as FLiNaK, FLiBe corrosion remains less understood because handling beryllium-containing salts presents substantial experimental challenges. It is therefore important to establish whether corrosion mechanisms identified in other salt systems also apply to FLiBe. Here, we investigated the early-stage corrosion of Ni-based alloys, austenitic stainless steels, and ferritic–martensitic steels in FLiBe at 650 °C for 96 h under sealed static conditions. In nominal FLiBe, all alloys exhibited limited, alloy-dependent near-surface chemistry changes without observed subsurface porosity. In contrast, addition of 2 wt.% EuF₃ activated pronounced penetrating corrosion in 316H and Inconel 600. These results show that FLiBe is not intrinsically restricted to mild depletion-only corrosion and that salt redox controls access to aggressive penetrating attack under the present conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Environmental Effects, |