Effects of dissolved oxygen on the oxide scales formed on ferritic-martensitic steel T12 exposed to supercritical water

Xiangyu Zhong, Fethi Hamdani, Jian Xu, Tetsuo Shoji, Tadashi Tatsuki, Jun Morii, Wakako Sasaki, Yasunori Ishii

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The oxidation behavior of T12 after exposure to 560 °C/25 MPa supercritical water with different dissolved oxygen contents was investigated. The weight gain increases while the resistance of the oxide scale decreases with the increasing dissolved oxygen content. The oxide scale is a typical multi-layered structure including a Fe-rich outer layer and a Cr-rich inner layer. The Cr-rich hematite layer oxide was observed on specimen tested at high dissolved oxygen. The possible oxidation mechanism was proposed and the effects of oxygen on the oxidation of alloys in supercritical water were discussed.

Original languageEnglish
Article number108516
JournalCorrosion Science
Volume167
DOIs
Publication statusPublished - 2020 May 1

Keywords

  • Ferritic-martensitic steel
  • High temperature corrosion
  • Oxidation
  • Oxide scale
  • Supercritical water

ASJC Scopus subject areas

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

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