6533b7d7fe1ef96bd126786c
RESEARCH PRODUCT
Conversion electron Mössbauer study of low carbon steel polarized in aqueous sulfate and sulfite containing sulfate solutions
M. Lakatos-varsányiW. MeiselA. VértesCs. VértesPhilipp GütlichL. Kisssubject
Aqueous solutionCarbon steelGeneral Chemical EngineeringInorganic chemistryengineering.materialElectrochemistrychemistry.chemical_compoundSulfitechemistryConversion electron mössbauer spectroscopyMössbauer spectroscopyElectrochemistryengineeringPitting corrosionSulfatedescription
Abstract The passivation of low carbon steel was studied in aqueous solutions of 0.5 M Na 2 SO 4 (pH = 3.5 and 6.5) and of 0.5 M Na 2 SO 4 + 0.001 M NaHSO 3 (pH 3.5 and 6.5). The used conversion electron Mossbauer spectroscopy (CEMS) with the complementary electrochemical, microscopic and spectrophotometric investigations proved that the presence of sulfite ion induces pitting corrosion. The compositions and thichnesses of the passive films formed during the electrochemical treatments are determined from the conversion electron Mossbauer spectra. γ-FeOOH was found in each case as a major component. At pH = 3.5, the sextet belonging to Fe 3 C appears in the spectra in most cases, and also FeSO 4 · H 2 O and could be detected after the shortest (90 min) polarization time.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-02-01 | Electrochimica Acta |