Effects of exposure temperature and time on corrosion behavior of a ferritic-martensitic steel P92 in aerated supercritical water

Xiangyu Zhong, Xinqiang Wu, En Hou Han

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Oxidation behavior of a ferritic-martensitic steel P92 exposed to aerated supercritical water at 400-550. °C and 25. MPa was investigated by gravimetry, X-ray diffraction, Raman spectroscopy and scanning electron microscopy. The weight gain approximately followed near-power oxidation kinetics. The oxidation rate was strongly dependent on temperature and followed Arrhenius behavior. The oxide film consisted of porous outer layer with hematite and magnetite and dense inner layer with Fe-Cr spinel. Exposure temperature and time showed significant influences on oxide surface morphologies, thickness and constituents. Higher temperature accelerated the formation of pores in oxide film. Related oxidation mechanism was also discussed.

Original languageEnglish
Pages (from-to)511-521
Number of pages11
JournalCorrosion Science
Volume90
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes

Keywords

  • A. Steel
  • B. SEM
  • C. High temperature corrosion
  • C. Oxidation

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Effects of exposure temperature and time on corrosion behavior of a ferritic-martensitic steel P92 in aerated supercritical water'. Together they form a unique fingerprint.

  • Cite this