A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes

Autores
Albani, Oscar Alfredo; Zerbino, Jorge Omar; Vilche, Jorge Roberto; Arvia, Alejandro Jorge
Año de publicación
1986
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The electrochemical and ellipsometric responses of iron electrodes in 0.04 M NaOH and in saturated Ca(OH)2 are investigated at 25°C, in the potential range where the passivating layer in the absence of oxygen under potential controlled and non-equilibrium conditions is formed. From the correlation of results a composite structure of the passivating layer is envisaged involving an inner layer which is difficult to electroreduce, probably related to Fe3O4, and an outer gelatinous iron hydroxide layer where a relatively fast, Fe(II)/Fe(III) redox process can be voltammetrically followed. The inhibitive properties of saturated Ca(OH)2 as compared to 0.04 M NaOH are explained through the absorption of Ca2+ ions at the outer plane of the inner part of the passivating film and the corresponding transport of water into the gelatinous part of the passivating film.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Química
Hierro
Electrodos
Electroquímica
Electrólitos
Alcalinización
Hidróxidos
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/82352
Acceder
id SEDICI_89a310939e8af647e25e84b1e56372ce
oai_identifier_str oai:sedici.unlp.edu.ar:10915/82352
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytesAlbani, Oscar AlfredoZerbino, Jorge OmarVilche, Jorge RobertoArvia, Alejandro JorgeCiencias ExactasQuímicaHierroElectrodosElectroquímicaElectrólitosAlcalinizaciónHidróxidosThe electrochemical and ellipsometric responses of iron electrodes in 0.04 M NaOH and in saturated Ca(OH)<sub>2</sub> are investigated at 25°C, in the potential range where the passivating layer in the absence of oxygen under potential controlled and non-equilibrium conditions is formed. From the correlation of results a composite structure of the passivating layer is envisaged involving an inner layer which is difficult to electroreduce, probably related to Fe<sub>3</sub>O<sub>4</sub>, and an outer gelatinous iron hydroxide layer where a relatively fast, Fe(II)/Fe(III) redox process can be voltammetrically followed. The inhibitive properties of saturated Ca(OH)<sub>2</sub> as compared to 0.04 M NaOH are explained through the absorption of Ca<sup>2+</sup> ions at the outer plane of the inner part of the passivating film and the corresponding transport of water into the gelatinous part of the passivating film.Instituto de Investigaciones Fisicoquímicas Teóricas y AplicadasFacultad de Ciencias Exactas1986-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1403-1411http://sedici.unlp.edu.ar/handle/10915/82352enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(86)87052-9info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:47:46Zoai:sedici.unlp.edu.ar:10915/82352Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:47:46.248SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes
title A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes
spellingShingle A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes
Albani, Oscar Alfredo
Ciencias Exactas
Química
Hierro
Electrodos
Electroquímica
Electrólitos
Alcalinización
Hidróxidos
title_short A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes
title_full A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes
title_fullStr A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes
title_full_unstemmed A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes
title_sort A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes
dc.creator.none.fl_str_mv Albani, Oscar Alfredo
Zerbino, Jorge Omar
Vilche, Jorge Roberto
Arvia, Alejandro Jorge
author Albani, Oscar Alfredo
author_facet Albani, Oscar Alfredo
Zerbino, Jorge Omar
Vilche, Jorge Roberto
Arvia, Alejandro Jorge
author_role author
author2 Zerbino, Jorge Omar
Vilche, Jorge Roberto
Arvia, Alejandro Jorge
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Hierro
Electrodos
Electroquímica
Electrólitos
Alcalinización
Hidróxidos
topic Ciencias Exactas
Química
Hierro
Electrodos
Electroquímica
Electrólitos
Alcalinización
Hidróxidos
dc.description.none.fl_txt_mv The electrochemical and ellipsometric responses of iron electrodes in 0.04 M NaOH and in saturated Ca(OH)<sub>2</sub> are investigated at 25°C, in the potential range where the passivating layer in the absence of oxygen under potential controlled and non-equilibrium conditions is formed. From the correlation of results a composite structure of the passivating layer is envisaged involving an inner layer which is difficult to electroreduce, probably related to Fe<sub>3</sub>O<sub>4</sub>, and an outer gelatinous iron hydroxide layer where a relatively fast, Fe(II)/Fe(III) redox process can be voltammetrically followed. The inhibitive properties of saturated Ca(OH)<sub>2</sub> as compared to 0.04 M NaOH are explained through the absorption of Ca<sup>2+</sup> ions at the outer plane of the inner part of the passivating film and the corresponding transport of water into the gelatinous part of the passivating film.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
description The electrochemical and ellipsometric responses of iron electrodes in 0.04 M NaOH and in saturated Ca(OH)<sub>2</sub> are investigated at 25°C, in the potential range where the passivating layer in the absence of oxygen under potential controlled and non-equilibrium conditions is formed. From the correlation of results a composite structure of the passivating layer is envisaged involving an inner layer which is difficult to electroreduce, probably related to Fe<sub>3</sub>O<sub>4</sub>, and an outer gelatinous iron hydroxide layer where a relatively fast, Fe(II)/Fe(III) redox process can be voltammetrically followed. The inhibitive properties of saturated Ca(OH)<sub>2</sub> as compared to 0.04 M NaOH are explained through the absorption of Ca<sup>2+</sup> ions at the outer plane of the inner part of the passivating film and the corresponding transport of water into the gelatinous part of the passivating film.
publishDate 1986
dc.date.none.fl_str_mv 1986-11
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/10915/82352
url http://sedici.unlp.edu.ar/handle/10915/82352
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(86)87052-9
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
1403-1411
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 13.13397

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