About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Presentation Title |
Corrosion Resistance of Single and Bilayer Boronized Coatings on Stainless Steel for Molten Salt Reactor Environments |
| Author(s) |
Qiongyi Xu, Jiwei Jiang, Yi Xie |
| On-Site Speaker (Planned) |
Yi Xie |
| Abstract Scope |
The advancements of molten salt reactors (MSRs) and electrorefining technology necessitate the development of structural materials with outstanding resistance to high-temperature molten salt corrosion and irradiation. In this study, boronized coatings were fabricated on 316L/H stainless steel by a direct thermal diffusion process, utilizing customizable boronizing precursor powders. By adjusting the precursor formulation, two distinct microstructures were achieved: a single-layer coating (~20 μm thick), and a bilayer coating with an outer layer (~10 μm) and an inner layer (~15 μm). The microstructure and phase distributions were thoroughly characterized by XRD, SEM, TEM, EDS and EELS. High-temperature corrosion tests in 54MgCl₂–24KCl–22NaCl (wt.%) molten salt at 500°C were conducted. The surface/subsurface analyses revealed that both coating architectures provided substantial protection, showing more favorable long-term stability than most other coatings reported before. Preliminary results from combined irradiation–corrosion experiments further demonstrate the coatings' robust protection under irradiation conditions. This integrated research provides a promising foundation for the application and further optimization of boronized coatings in advanced nuclear systems. Continued research and optimization of advanced corrosion-resistant coatings will further enhance material durability and safety in MSRs and other molten salt-involved fields. |
| Proceedings Inclusion? |
Undecided |