Corrosion of Zr-xTi-yNb alloys in concentrated nitric acid at elevated temperature

Xian Zong Wang, Yi Wang, Yi Xin Wang, Xinyu Lu, Weijia Gong, Zhongkui Li, Jinshan Li

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Corrosion-resistant alloys are essential for reprocessing the spent nuclear fuel in concentrated HNO3 at elevated temperature. Herein, 14 Zr-xTi-yNb alloys were fabricated to reveal the effects of Ti and Nb on their long-term corrosion behaviors. Zr-1.0Ti-0.5 Nb alloy achieves a prominently low corrosion rate of < 0.0003 mm/a in 12 M HNO3 at 95 ℃ for 1000 h, contributed to the moderate Ti which strengthens the passivation and Nb which enhances the stability of the protective oxides. This work offers new insights into Zr alloys’ design and their corrosion mechanism for reprocessing dissolver of spent nuclear fuel.

Original languageEnglish
Article number111226
JournalCorrosion Science
Volume219
DOIs
StatePublished - 15 Jul 2023

Keywords

  • Corrosion
  • Nitric acid
  • Reprocessing dissolver
  • Spent nuclear fuel
  • Ti and Nb alloying
  • Zirconium alloys

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