Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 29, Issue 12, Pages 8441-8450Publisher
SPRINGER
DOI: 10.1007/s11665-020-05300-z
Keywords
electrochemical polarization; pseudo-trans-passivity; titanium alloy; uniform dissolution
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This paper describes the corrosion behavior of a Ti-based alloy, Ti-Al-Zr for aggressive nitric acid applications. Corrosion behavior of the materials was established using electrochemical polarization technique, for three process variables encountered in reprocessing plants: (a) nitric acid (1, 3 and 6 M), (b) temperature (25 and 75 degrees C) and (c) oxidizing ions (Ce+4 and V+5 ions). Electrochemical polarization tests established that the Ti-Al-Zr alloy was in passive condition up to a potential of 4000 mV(Ag/AgCl) even at 75 degrees C, and it showed uniform corrosion. SS304L, however, showed severe intergranular corrosion at a much lower anodic potential, thus establishing better corrosion resistance for Ti-Al-Zr alloy in the aggressive nitric acid environment.
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