About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
C-15: Silicide-Based Coatings to Prevent Molten Chloride Corrosion |
| Author(s) |
Seongwon Ham, Sangtae Kim |
| On-Site Speaker (Planned) |
Seongwon Ham |
| Abstract Scope |
To improve molten chloride corrosion of structural materials, various coatings and surface treatments, including boriding, have been demonstrated. While boriding proved effective among both nickel- and iron-based alloys, the high scattering cross section of boron makes it difficult to apply for applications involving the thermal neutron spectrum. Here, we show surface siliciding via pack cementation as a viable option for improving corrosion resistance against molten chlorides. Pack cementation on stainless steel 316 resulted in a diffuse coating layer, with the depth of siliciding controlled via the annealing characteristics during cementation. The silicide coatings show corrosion resistance when tested under 800 ℃ molten chloride for 100 hours. The elemental distributions on the surface before and after corrosions were examined through SEM-EDS, and the thermodynamic assessment of silicides will also be discussed, along with other potential coating elements such as boron and nitrides. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Surface Modification and Coatings, Ceramics |