Jia, Y.; Chang, S.; Du, X.; Guo, S. Corrosion Performance of Commercial Alloys and Refractory Metals in Conditions for Electrorefining of Spent Nuclear Fuels. Crystals2023, 13, 817.
Jia, Y.; Chang, S.; Du, X.; Guo, S. Corrosion Performance of Commercial Alloys and Refractory Metals in Conditions for Electrorefining of Spent Nuclear Fuels. Crystals 2023, 13, 817.
Jia, Y.; Chang, S.; Du, X.; Guo, S. Corrosion Performance of Commercial Alloys and Refractory Metals in Conditions for Electrorefining of Spent Nuclear Fuels. Crystals2023, 13, 817.
Jia, Y.; Chang, S.; Du, X.; Guo, S. Corrosion Performance of Commercial Alloys and Refractory Metals in Conditions for Electrorefining of Spent Nuclear Fuels. Crystals 2023, 13, 817.
Abstract
Molten LiCl-KCl salt and liquid cadmium are proposed as the electrolyte and the reactive cathode for the electrorefining of spent nuclear fuels. Corrosion testing of existing alloys is mandatory to ensure the service life of the electrorefiner vessel and electrode assemblies. Haynes C276, Inconel 600, AISI 316L stainless steel, and 42CrMo low alloy steel were exposed to LiCl-KCl melt at 500°C for 500 h in an argon atmosphere. All alloys suffered from dissolution attacks with the presence of oxide islands or porous oxide layer on the surface. AISI 316L, T91 steel and tungsten specimens were also submitted to corrosion tests in liquid cadmium at 500°C for 120 h. Corrosion of AISI 316L and T91 stainless steel were predominated by chemical oxidation with additional severe Ni dealloying occurred on AISI 316L. Tungsten only suffered from dissolution attack in comparison.
Keywords
Corrosion; Molten salts; Liquid cadmium; SEM
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
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