6533b833fe1ef96bd129caa8

RESEARCH PRODUCT

Influence of sulphite on the passivation of iron

A. VértesA. VértesErnő KuzmannErnő KuzmannM. L. VarsanyiM. L. VarsanyiW. MeiselW. Meisel

subject

Materials sciencePassivationGeneral Chemical EngineeringInorganic chemistryElectrochemistrychemistry.chemical_compoundchemistrySaturated calomel electrodeSodium sulfateMössbauer spectroscopyElectrochemistrySurface layerPolarization (electrochemistry)Sodium sulfite

description

Abstract Mossbauer 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 FeSO 4 ·H 2 O on the surface and FeSO 3 ·3H 2 O 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.

yearjournalcountryeditionlanguage
1991-01-01Electrochimica Acta
https://doi.org/10.1016/0013-4686(91)85293-g