Metallic impurities induced corrosion of a Ni-26W-6Cr alloy in molten fluoride salts at 850 oC
Source abstract
Abstract
Abstract The effect of metallic impurities on corrosion of a Ni-26W-6Cr alloy in molten FLiNaK salts at 850 °C was investigated. Results show that the Ni-26W-6Cr alloy exhibits the same excellent compatibility with fluoride salts as Hastelloy N alloy. Fe impurities in molten salts accelerate the diffusion of Cr in the alloy, which determines the corrosion degree of the alloy. Unexpected depletion of W from the alloy was observed, which mostly results from the presence of Mo impurity in the salts. Mo impurity should be limited because of the significant effect of W on the neutron spectra of reactors.
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Research context
OpenAlex topics: Fusion materials and technologies · High Temperature Alloys and Creep · Nuclear reactor physics and engineering
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