Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions

dc.creatorAlbani, Oscar Alfredo
dc.creatorGassa, Liliana Mabel
dc.creatorZerbino, Jorge Omar
dc.creatorVilche, Jorge Roberto
dc.creatorArvia, Alejandro Jorge
dc.date1990
dc.date2021-05-26T11:11:00Z
dc.date.accessioned2023-07-15T01:48:59Z
dc.date.available2023-07-15T01:48:59Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/119219
dc.identifierissn:0013-4686
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7459698
dc.descriptionThe passivity and passivity breakdown of polycrystalline iron is investigated through electrochemical methods complemented with ellipsometry, by employing plain 0.04 M NaOH and saturated Ca(OH)<sub>2</sub> solutions with the addition of chloride salt of concentrations up to 1 M. The comparative results indicate that the initial reactions of Fe(OH)<sub>2</sub> formation at the inner part of the passive layer level (Fe<sub>3</sub>O<sub>4</sub>) are only slightly influenced by either the cation or the presence of Cl− ion in solution, in contrast to their large influence at the outer part of the passive layer (hydrous FeOOH species) where Fe<sup>2+</sup>/Fe<sup>3+</sup> redox reactions take place. At high positive potential the breakdown of passivity is also influenced by both Cl− ion and cation present in solution.
dc.descriptionInstituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
dc.formatapplication/pdf
dc.format1437-1444
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.subjectCiencias Exactas
dc.subjectQuímica
dc.subjectPassivity of iron
dc.subjectPassivity breakdown
dc.subjectIron in saturated Ca(OH)2 solutions
dc.subjectEllipsometry of passive iron layers
dc.subjectInfluence of Cl− ions on passive iron
dc.subjectComposite passive iron layer structure
dc.titleComparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions
dc.typeArticulo
dc.typeArticulo


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