6533b831fe1ef96bd129970e
RESEARCH PRODUCT
A Mössbauer study of the crystalline structure of the passive film formed on iron in aqueous sulfate solution containing sulfite in low concentration
M. L. VarsanyiPhilipp GütlichA. VértesW. MeiselCs. Vértessubject
chemistry.chemical_compoundAqueous solutionchemistryPassivationConversion electron mössbauer spectroscopyGeneral Chemical EngineeringInorganic chemistrySodium sulfateElectrochemistryIron oxidePitting corrosionHydroxideSodium sulfitedescription
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 Mossbauer 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-10-01 | Electrochimica Acta |