6533b853fe1ef96bd12ac29b

RESEARCH PRODUCT

Passive and transpassive behaviour of Alloy 31 in a heavy brine LiBr solution

Ramón Manuel Fernández DomeneMaría Encarnación Blasco TamaritDionisio Miguel García GarcíaJosé García Antón

subject

EISMaterials scienceGeneral Chemical EngineeringPassive filmAlloyMetallurgyMott schottkyengineering.materialApplied potentialINGENIERIA QUIMICAStainless steelDielectric spectroscopyElectroquímicaMott–SchottkyBrineElectrochemistryengineeringAcer CorrosióAustenitic stainless steelElectrical conductorTranspassivity

description

The passive and transpassive behaviour of Alloy 31, a highly alloyed austenitic stainless steel (UNS N08031), has been investigated in a LiBr heavy brine solution (400 g/l) at 25 °C using potentiostatic polarisation combined with electrochemical impedance spectroscopy and Mott–Schottky analysis. The passive film formed on Alloy 31 has been found to be p-type and/or n-type in electronic character, depending on the film formation potential. The thickness of the film formed at potentials within the passive region increases linearly with applied potential. The film formed at transpassive potentials is thinner and more conductive than the film formed within the passive region. These observations are consistent with the predictions of the Point Defect Model for passive and transpassive films on metals and alloys

yearjournalcountryeditionlanguage
2013-01-01Electrochimica Acta
https://doi.org/10.1016/j.electacta.2013.02.024