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

Autores
Albani, Oscar Alfredo; Gassa, Liliana Mabel; Zerbino, Jorge Omar; Vilche, Jorge Roberto; Arvia, Alejandro Jorge
Año de publicación
1990
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The 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)2 solutions with the addition of chloride salt of concentrations up to 1 M. The comparative results indicate that the initial reactions of Fe(OH)2 formation at the inner part of the passive layer level (Fe3O4) 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 Fe2+/Fe3+ redox reactions take place. At high positive potential the breakdown of passivity is also influenced by both Cl− ion and cation present in solution.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
Passivity of iron
Passivity breakdown
Iron in saturated Ca(OH)2 solutions
Ellipsometry of passive iron layers
Influence of Cl− ions on passive iron
Composite passive iron layer structure
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/119219
Acceder
id SEDICI_f4511fd43302372a4e887eba71e76966
oai_identifier_str oai:sedici.unlp.edu.ar:10915/119219
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutionsAlbani, Oscar AlfredoGassa, Liliana MabelZerbino, Jorge OmarVilche, Jorge RobertoArvia, Alejandro JorgeCiencias ExactasQuímicaPassivity of ironPassivity breakdownIron in saturated Ca(OH)2 solutionsEllipsometry of passive iron layersInfluence of Cl− ions on passive ironComposite passive iron layer structureThe 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.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1990info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1437-1444http://sedici.unlp.edu.ar/handle/10915/119219enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(90)85018-Iinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:09:00Zoai:sedici.unlp.edu.ar:10915/119219Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:09:01.169SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions
title Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions
spellingShingle Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions
Albani, Oscar Alfredo
Ciencias Exactas
Química
Passivity of iron
Passivity breakdown
Iron in saturated Ca(OH)2 solutions
Ellipsometry of passive iron layers
Influence of Cl− ions on passive iron
Composite passive iron layer structure
title_short Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions
title_full Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions
title_fullStr Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions
title_full_unstemmed Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions
title_sort Comparative study of the passivity and the breakdown of passivity of polycrystalline iron in different alkaline solutions
dc.creator.none.fl_str_mv Albani, Oscar Alfredo
Gassa, Liliana Mabel
Zerbino, Jorge Omar
Vilche, Jorge Roberto
Arvia, Alejandro Jorge
author Albani, Oscar Alfredo
author_facet Albani, Oscar Alfredo
Gassa, Liliana Mabel
Zerbino, Jorge Omar
Vilche, Jorge Roberto
Arvia, Alejandro Jorge
author_role author
author2 Gassa, Liliana Mabel
Zerbino, Jorge Omar
Vilche, Jorge Roberto
Arvia, Alejandro Jorge
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Passivity of iron
Passivity breakdown
Iron in saturated Ca(OH)2 solutions
Ellipsometry of passive iron layers
Influence of Cl− ions on passive iron
Composite passive iron layer structure
topic Ciencias Exactas
Química
Passivity of iron
Passivity breakdown
Iron in saturated Ca(OH)2 solutions
Ellipsometry of passive iron layers
Influence of Cl− ions on passive iron
Composite passive iron layer structure
dc.description.none.fl_txt_mv The 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.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The 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.
publishDate 1990
dc.date.none.fl_str_mv 1990
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/119219
url http://sedici.unlp.edu.ar/handle/10915/119219
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0013-4686
info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(90)85018-I
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.format.none.fl_str_mv application/pdf
1437-1444
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 12.982451

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