PUBLICATION: CORROSION SCIENCE

AUTHORS: Ai, H; Liu, SL; Ye, XX; Jiang, L; Zhou, B; Yang, XM; Leng, B; Li, ZJ

 

The effect of metallic impurities on corrosion of a Ni-26W-6Cr alloy in molten FLiNaK salts at 850 degrees 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.

 

LINKS: http://dx.doi.org/10.1016/j.corsci.2020.109079