Mechanistic understanding of the roles of hydrogen in modification of oxide film of alloy 600 in high temperature high pressure water environment

Zihao Wang, Yoichi Takeda

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The roles of H in the modification process of the oxide film of alloy 600 was investigated through a dual-exposed oxidation experiment with an in-situ H-charging method in a high temperature high pressure water environment. The selective dissolution of the NiO modified the oxide film into a defective and porous, single-layered Cr2O3 skeleton after oxidation with H charging. The modification process depended on three different chemical states of H with a varied distribution: i) H2 molecule in water, ii) neutral H in the grain boundary of the oxide film, and, iii) proton (H+) in the lattice of the oxide film.

Original languageEnglish
Article number108656
JournalCorrosion Science
Volume170
DOIs
Publication statusPublished - 2020 Jul 1

Keywords

  • A. Alloy
  • B. STEM
  • B. XPS
  • C. High temperature corrosion
  • C. Hydrogen permeation

ASJC Scopus subject areas

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

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