JOURNAL ARTICLE

Comparative corrosion behaviour of different alloys for nitric acid service in reprocessing plants.

  • Published In: Corrosion Engineering, Science & Technology, 2025, v. 60, n. 6. P. 474 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Chandra, K.; Das, Sanket; Mahanti Ghosal, Amrita 3 of 3

Abstract

This article focuses on evaluating the corrosion resistance of three alloys—SS 304L, Ti–Al–Zr, and Zircaloy-4—in boiling nitric acid environments typical of spent nuclear fuel reprocessing plants in India. SS 304L, currently used for critical components, is susceptible to intergranular corrosion (IGC) due to transpassive dissolution at high oxidizing potentials, leading to failures. Electrochemical and immersion tests in liquid, vapor, and condensate phases of nitric acid showed that both Ti–Al–Zr and Zircaloy-4 alloys exhibit a broader passive potential range and superior corrosion resistance compared to SS 304L, with Zircaloy-4 performing best under all tested conditions. While Ti–Al–Zr corrodes more in pure nitric acid, its corrosion resistance improves significantly in the presence of oxidizing ions, making both Ti–Al–Zr and Zircaloy-4 suitable alternatives to SS 304L for critical components exposed to aggressive nitric acid in nuclear reprocessing plants.

Additional Information

  • Source:Corrosion Engineering, Science & Technology. 2025/09, Vol. 60, Issue 6, p474
  • Document Type:Article
  • Subject Area:Chemistry
  • Publication Date:2025
  • ISSN:1478-422X
  • DOI:10.1177/1478422X241306374
  • Accession Number:187637838
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