Molten Salt Reactors (MSRs) are a promising alternative to the current generation of light-water reactors. However, the corrosivity of molten salts is a significant issue that must be understood before MSRs become commercial. Ni-base superalloys are promising candidate materials that can provide corrosion resistance in molten salt environments and serve as reliable structural materials for reactor operation. In this study, immersion studies of three different Ni-base superalloys were conducted in ternary chloride salts at 750°C. Post-test characterization included mass change per unit area, X-ray diffraction, and microstructural evaluation using optical microscopy, and scanning electron microscopy coupled with energy dispersive X-ray spectroscopy. The effect of alloying additions on molten chloride corrosion is discussed.

Subject
X-ray diffraction, Salts, Metal surfaces, Nickel based alloys, Oxide formation, Mass loss, Molybdenum alloys, Oxide scales, Superalloys, Scale formation, Immersion, Aluminum alloys, Chlorides
Keywords:
Nickel-based alloys, molten salt reactors, molten salt corrosion, molten chloride salts
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2023
Association for Materials Protection and Performance (AMPP)
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