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RESEARCH PRODUCT
Electrochemical and conversion electron mössbauer study of corrosion induced by acid rain
W. MeiselM. Lakatos-varsányiPhilipp GütlichA. VértesCs. Vértessubject
Nuclear and High Energy PhysicsAqueous solutionPassivationCarbon steelChemistryInorganic chemistryengineering.materialElectrochemistryCorrosionchemistry.chemical_compoundSulfiteConversion electron mössbauer spectroscopyPitting corrosionengineeringInstrumentationdescription
Abstract The passivation of low carbon steel was studied in aqueous solution of 0.5M Na2SO4 +0.001M NaHSO3 (pH 3.5, 6.5 and 8.5) which can be considered as a model of acid rain. The used conversion electron Mossbauer spectroscopy (CEMS) with the complementary electrochemical investigations proved that the sulfite ions induce pitting corrosion at pH 3.5 and 6 5 while the measurements showed much weaker pitting at pH 8.5. The compositions and thicknesses of the passive films formed during the electrochemical treatments are determined from the CEM spectra. Only γ-FeOOH was found on the surface of the samples at pH 6.5 and 8.5. Nevertheless, at pH 3.5 the sextet belonging to Fe3C appears in the spectra, and also FeS04H2O could be detected in low concentration.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-04-01 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |