Corrosion resistance of V-4Ti-4Cr alloy in convection flow of eutectic Na-K alloy

• Published in: Inorganic materials : applied research 2015-03, Vol.6 (2), p.133-137, Article 133
• Main Authors: Semenov, V. V., Lyublinski, I. E., Krasin, V. P., Vertkov, A. V., Soyustova, S. I., Potapova, A. E., Zharkov, M. Yu
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Materials of Power Engineering and Radiation-Resistant Materials; Materials Science
• ISSN: 2075-1133; 2075-115X; 2075-115X
• DOI: 10.1134/S2075113315020148

The corrosion resistance of V-Ti-Cr alloys in contact with a eutectic Na-K melt have been evaluated from experiments on the compatibility of V-4Ti-4Cr alloy specimens with a convection flow of the Na-K eutectic. In the test system made of the same vanadium-based alloy, the maximum temperature was 650°C, the temperature drop was 150°C, and the duration of the tests was 500 h. The experiments have shown that, under the conditions of the tests carried out in the Na-K eutectic with an initial concentration of oxygen of 0.04 wt %, the V-4Ti-4Cr alloy undergoes intense mass transfer. The solid metal absorbs the oxygen impurity from the liquid melt. The observed effects agree with the previously drawn conclusions on the effect of the oxygen impurity on the solubility of vanadium in the Na-K eutectic. Provided that the intensity of the source of the oxygen impurity in the corrosion system is limited, one might expect acceptable corrosion compatibility of the V-4Ti-4Cr alloy with the Na-K eutectic.