Atomic-scale structure of α-FeOOH containing chromium by anomalous X-ray scattering coupled with reverse Monte Carlo simulation

S. Suzuki, Y. Takahashi, M. Saito, M. Kusakabe, T. Kamimura, H. Miyuki, Y. Waseda

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Quantitative X-ray structural analysis by applying anomalous X-ray scattering (AXS) has been used for characterizing the effect of chromium on the atomic-scale structure of α-FeOOH particles, which is a typical ferric oxyhydroxide in rust formed on the steel surface. The X-ray diffraction profiles showed that the fundamental structure of α-FeOOH containing chromium is similar to that of α-FeOOH particles without chromium. The realistic atomic-scale structures in α-FeOOH with and without chromium were estimated by fitting both the ordinary and environmental interference functions with model calculation using the reverse Monte Carlo (RMC) simulation technique. The results indicated that distortion of the linkage of FeO 6 octahedral structural units in α-FeOOH is induced by chromium addition, but chromium addition to α-FeOOH fundamentally is likely to be substituted for iron in α-FeOOH. The atomic-scale arrangements in α-FeOOH with and without chromium were visualized using FeO6 octahedral units. These middle range ordering structures were correlated with the microscopic morphological change of particles by chromium addition.

Original languageEnglish
Pages (from-to)1271-1284
Number of pages14
JournalCorrosion Science
Volume47
Issue number5
DOIs
Publication statusPublished - 2005 May

Keywords

  • Anomalous X-ray scattering
  • Corrosion product
  • Ferric oxyhydroxide
  • Goethite
  • Reverse Monte Carlo simulation
  • X-ray diffraction

ASJC Scopus subject areas

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

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