Influence of phosphate species on green rust I transformation and local structure and morphology of γ-FeOOH

Gadadhar Sahoo, Shun Fujieda, Kozo Shinoda, Shigeru Suzuki

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

To clarify the role of phosphate in the formation of corrosion products, the transformation of GRI(Cl-) with the addition of phosphate was characterized through XRD, TEM, and solution analysis. Electrochemical analysis showed that the transformation of GRI(Cl-) was delayed and the size of the final products, i.e., γ-FeOOH was reduced in the phosphate added case. X-ray absorption spectroscopy indicated that the neighboring Fe-Fe coordination number of FeO6 octahedral unit in γ-FeOOH was decreased. These effects of phosphate are attributed to its adsorption on GRI(Cl-) and nucleated γ-FeOOH that prevented particle growth during oxidation process.

Original languageEnglish
Pages (from-to)2446-2452
Number of pages7
JournalCorrosion Science
Volume53
Issue number8
DOIs
Publication statusPublished - 2011 Aug 1

Keywords

  • A. Iron
  • B. EXFAS
  • B. XRD
  • C. Oxidation
  • C. Oxidation reduction
  • C. Rust

ASJC Scopus subject areas

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

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