About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Decoupling One‑Dimensional and Two‑Dimensional Corrosion in Metals Under Molten Salt Environment |
| Author(s) |
Yang Yang, Lei Ding, Weiyue Zhou |
| On-Site Speaker (Planned) |
Yang Yang |
| Abstract Scope |
The progression of localized corrosion produces porosities that create internal pathways for environmental ingress. Visualizing these networks is essential for understanding corrosion penetration. Here, we used focused ion beam–scanning electron microscopy (FIB-SEM) 3D tomography to characterize porosity morphologies in Ni-Cr-based alloys after corrosion in FLiNaK molten salt. We identified a highly localized form, termed one-dimensional (1D) wormhole corrosion, driving rapid salt penetration in Ni-20Cr. Similar 1D morphologies appeared in SS 316 and Incoloy 800H, but their network structures differed markedly. To clarify the interplay among corrosion modes, we developed a quantitative framework to decouple 1D and two-dimensional corrosion using geometric and volumetric analysis of 3D data. This approach enables rigorous comparisons of corrosion susceptibility and reveals how alloy composition governs transitions between localized and diffuse corrosion. Understanding void evolution mechanisms provides critical insights for designing materials with improved corrosion resistance in molten salt environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Environmental Effects, Nuclear Materials |