Kinetics of iron passivation studied by sub-second resolution realtime X-ray reflectivity technique

Hiromasa Fujii, Yusuke Wakabayashi, Takashi Doi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The early stage of electrochemically-induced Fe(001) passivation is investigated via a sub-second resolution real-time X-ray reflectivity technique. Static measurements clearly demonstrate that the passive layer is composed of two distinct layers comprising a dense inner oxide layer and a loosely packed outer layer. The growth of the inner passive layer is mostly completed within 1 s, while the growth rate in the later process is much slower and is qualitatively consistent with typical growth models such as the high-field model and point defect model. The rate-determining mechanism in the early stage is clearly different from that in the later stage.

Original languageEnglish
Pages (from-to)E212-E216
JournalJournal of the Electrochemical Society
Volume166
Issue number8
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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