6533b859fe1ef96bd12b8026

RESEARCH PRODUCT

Influence of the chemical dissolution of MnS inclusions on the composition of passive films and the local electrochemical behaviour of stainless steels

Roland OltraVincent VignalOlivier HeintzHalina KrawiecHalina Krawiec

subject

Materials scienceX-ray photoelectron spectroscopyChemical engineeringAtomic force microscopyMetallurgyPitting corrosionComposition (visual arts)Aqueous electrolyteElectrochemistryDissolutionChemical dissolution

description

Abstract Immersion of stainless steel containing MnS inclusions in aqueous electrolytes leads to the chemical dissolution of these heterogeneities. Chemical dissolution of MnS inclusions in 1M NaCl, pH=3 was studied using in-situ AFM and the dissolution rate of MnS was estimated between 0.04 and 0.19 μm 3 /min. The local electrochemical measurements reveal that the chemical dissolution of MnS inclusions promotes pitting corrosion. Similary, chemical dissolution of MnS inclusions in IM NaClO 4 , pH=3 solution modified the surface close to the inclusions by the presence of FeSO 4 in the passive film.

yearjournalcountryeditionlanguage
2006-01-01
https://doi.org/10.1016/b978-044452224-5/50087-1