Corrosion performance of Ni-16%wt.Mo-X%wt.SiC alloys in FLiNaK molten salt

The corrosion performance of Ni-16%wt.Mo-X%wt.SiC (X = 0.5, 1.5, 2.0, 2.5 and 3.0) alloys prepared via mechanical alloying followed by consolidation using spark plasma sintering (SPS) from pure Ni, Mo and SiC powders is investigated. Corrosion testing at 650 °C/200 h in FLiNaK molten salt showed that increasing the volume fraction of SiC in the initial Ni-Mo-SiC powder mixture leads to formation of large amount of Mo2C precipitates, which readily dissolve into FLiNaK molten salt. Hence, only the corrosion resistance of NiMo-SiC alloys with a low SiC content (<2 wt.%) is comparable to that of Hastelloy-N® alloy. © 2018 Elsevier Ltd. All rights reserved.

Keywords

Corrosion resistance, Molten salts, Nickel, Molybdenum, Molten salt reactors, Silicon carbides, Transition elements

Citation

Yang, C., Muránsky, O., Zhu, H., Karatchevtseva, I., Holmes, R., Avdeev, M., Jia, Y., Huang, H., & Zhou, X. (2018). Corrosion performance of Ni-16%wt.Mo-X%wt.SiC alloys in FLiNaK molten salt. Corrosion Science, 143, 240-248. doi:10.1016/j.corsci.2018.08.036