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

Autor: Fernández Domene, Ramón Manuel, Blasco Tamarit, María Encarnación, García García, Dionisio Miguel, García Antón, José
Rok vydání: 2013
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Zdroj: Fernández Domene, Ramón Manuel Blasco-Tamarit, E. García-García, D.M. García-Antón, Jose 2013 Passive and transpassive behaviour of Alloy 31 in a heavy brine LiBr solution Electrochimica Acta 95 1 11
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
RODERIC: Repositorio Institucional de la Universitat de Valéncia
ISSN: 0013-4686
DOI: 10.1016/j.electacta.2013.02.024
Popis: 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
We wish express our gratitude to the Ministerio de Ciencia e Innovacion (project CTQ2009-07518), for the economical support of this research, to Thyssen Krupp for supplying the materials, and to Dr. M. Asuncion Jaime for her translation assistance.
Databáze: OpenAIRE
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