Oxidation behaviour of Zr-1.7Sn-2.3Hf alloy in nitrogen-containing steam at 1200 ºC

Lichun Zheng, Kazuya Hosoi, Shigeru Ueda, Xu Gao, Shin ya Kitamura, Yoshinao Kobayashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The effect of nitrogen on the oxidation of Zr-1.7Sn-2.3Hf alloy in steam at 1200 °C was studied with respect to the oxidation kinetics and the underlying mechanism. Oxidation of Zr-1.7Sn-2.3Hf in steam obeys parabolic rate law regardless of the presence of nitrogen. Nitrogen, however, linearly accelerates the oxidation of Zr-1.7Sn-2.3Hf when its partial pressure exceeds a critical value. The accelerated oxidation of Zr-1.7Sn-2.3Hf is attributed to the cracks in the oxide layer caused by nitrogen. To account for the cracks, a new mechanism involving nucleation, growth and re-oxidation of ZrN precipitates was proposed.

Original languageEnglish
Pages (from-to)363-373
Number of pages11
JournalCorrosion Science
Volume140
DOIs
Publication statusPublished - 2018 Aug 1

Keywords

  • A. Tin
  • A. Zirconium
  • B. EPMA
  • C. Amorphous structures
  • C. High temperature corrosion
  • C. Kinetic parameters

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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