Influence of sulphite on the passivation of iron

E. Kuzmann, M. L. Varsányi, A. Vértes, W. Meisel

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Mössbauer spectroscopy and electrochemical measurements were used to study the passivation of iron and steels in a sulphite containing solution. The potentiodynamic curves show that passivation occurs at -140 mV potential vs saturated calomel electrode (sce). The main phase of the passive layer was found to be γ-FeOOH, while FeSO4·H2O on the surface and FeSO3·3H2O inside the layer were identified as minor phases in the case of polarization in a solution of pH 3.37. Only γ-FeOOH was observed on the surface of samples polarized at pH 6.6.

Original languageEnglish
Pages (from-to)911-913
Number of pages3
JournalElectrochimica Acta
Issue number5-6
Publication statusPublished - 1991


ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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