A Mössbauer study of the crystalline structure of the passive film formed on iron in aqueous sulfate solution containing sulfite in low concentration

Cs Vértes, M. L. Varsányi, A. Vértes, W. Meisel, P. Gütlich

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Electrochemically induced passivation of evaporated, enriched 57Fe in 0.5 mol dm-3 Na2SO4 + 0.001 mol dm-3 NaHSO3 aqueous solution (pH 6.5) was followed by conversion electron Mössbauer spectroscopy. The transformation of amorphous iron oxide or hydroxide into crystalline γ-FeOOH could be observed with the increase of the polarization time. The comparison of the original quantity of evaporated, enriched 57Fe layer on the surface of the samples with the dissolved iron, measured in the solutions after the polarization, proved the existence of pitting corrosion at this pH.

Original languageEnglish
Pages (from-to)2253-2256
Number of pages4
JournalElectrochimica Acta
Volume38
Issue number15
DOIs
Publication statusPublished - Oct 1993

Keywords

  • acid rain
  • conversion electron Mössbauer spectroscopy
  • enriched Fe
  • pitting corrosion
  • sulfite ion

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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