Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance

Autores
Rodríguez, Martín Alejandro; Carranza, Ricardo Mario
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Impedance measurements were performed for alloy 22 in the passive and transpassive range, in 1 M NaCl at 90C. A Rω-(R//CPE) circuit model was applied in the full passive range, where R was the film resistance. This model also applied for a wide range of chloride concentrations and pH values, at the open circuit potential. Two time constants were observed at the beginning and at the end of the passive range. In these cases, the resistances for the ion transfer might be located at the film interfaces, and not in the film itself. The protective properties of the film improved with polarization time due to the thickening and ageing of the film. The film resistance and the space charge layer thickness increased with the potential. The oxidation of Cr3+ to Cr6+ occurred in the film at high potentials, followed by the transpassive dissolution. In the pre-transpassive range of potentials, the film showed a p-type electronic character, while the ionic properties were that of a passive film. The passive film of alloy 22 was an n-type semiconductor, which changed to a p-type for the high passive potentials. ND 2.7 1020 cm-3 and EFB=-0.551 VSCE were determined.
Fil: Rodríguez, Martín Alejandro. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina
Fil: Carranza, Ricardo Mario. Universidad Nacional de San Martín; Argentina. Comisión Nacional de Energía Atómica; Argentina
Materia
electrochemical impedance spectroscopy
nickel alloys
passivation
space charge
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/192637

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network_name_str CONICET Digital (CONICET)
spelling Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedanceRodríguez, Martín AlejandroCarranza, Ricardo Marioelectrochemical impedance spectroscopynickel alloyspassivationspace chargehttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1https://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Impedance measurements were performed for alloy 22 in the passive and transpassive range, in 1 M NaCl at 90C. A Rω-(R//CPE) circuit model was applied in the full passive range, where R was the film resistance. This model also applied for a wide range of chloride concentrations and pH values, at the open circuit potential. Two time constants were observed at the beginning and at the end of the passive range. In these cases, the resistances for the ion transfer might be located at the film interfaces, and not in the film itself. The protective properties of the film improved with polarization time due to the thickening and ageing of the film. The film resistance and the space charge layer thickness increased with the potential. The oxidation of Cr3+ to Cr6+ occurred in the film at high potentials, followed by the transpassive dissolution. In the pre-transpassive range of potentials, the film showed a p-type electronic character, while the ionic properties were that of a passive film. The passive film of alloy 22 was an n-type semiconductor, which changed to a p-type for the high passive potentials. ND 2.7 1020 cm-3 and EFB=-0.551 VSCE were determined.Fil: Rodríguez, Martín Alejandro. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto Sabato; ArgentinaFil: Carranza, Ricardo Mario. Universidad Nacional de San Martín; Argentina. Comisión Nacional de Energía Atómica; ArgentinaElectrochemical Society2011-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/192637Rodríguez, Martín Alejandro; Carranza, Ricardo Mario; Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance; Electrochemical Society; Journal of the Electrochemical Society; 158; 6; 6-2011; 221-2300013-4651CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1149/1.3581034info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:07:49Zoai:ri.conicet.gov.ar:11336/192637instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:07:49.803CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance
title Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance
spellingShingle Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance
Rodríguez, Martín Alejandro
electrochemical impedance spectroscopy
nickel alloys
passivation
space charge
title_short Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance
title_full Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance
title_fullStr Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance
title_full_unstemmed Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance
title_sort Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance
dc.creator.none.fl_str_mv Rodríguez, Martín Alejandro
Carranza, Ricardo Mario
author Rodríguez, Martín Alejandro
author_facet Rodríguez, Martín Alejandro
Carranza, Ricardo Mario
author_role author
author2 Carranza, Ricardo Mario
author2_role author
dc.subject.none.fl_str_mv electrochemical impedance spectroscopy
nickel alloys
passivation
space charge
topic electrochemical impedance spectroscopy
nickel alloys
passivation
space charge
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Impedance measurements were performed for alloy 22 in the passive and transpassive range, in 1 M NaCl at 90C. A Rω-(R//CPE) circuit model was applied in the full passive range, where R was the film resistance. This model also applied for a wide range of chloride concentrations and pH values, at the open circuit potential. Two time constants were observed at the beginning and at the end of the passive range. In these cases, the resistances for the ion transfer might be located at the film interfaces, and not in the film itself. The protective properties of the film improved with polarization time due to the thickening and ageing of the film. The film resistance and the space charge layer thickness increased with the potential. The oxidation of Cr3+ to Cr6+ occurred in the film at high potentials, followed by the transpassive dissolution. In the pre-transpassive range of potentials, the film showed a p-type electronic character, while the ionic properties were that of a passive film. The passive film of alloy 22 was an n-type semiconductor, which changed to a p-type for the high passive potentials. ND 2.7 1020 cm-3 and EFB=-0.551 VSCE were determined.
Fil: Rodríguez, Martín Alejandro. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina
Fil: Carranza, Ricardo Mario. Universidad Nacional de San Martín; Argentina. Comisión Nacional de Energía Atómica; Argentina
description Impedance measurements were performed for alloy 22 in the passive and transpassive range, in 1 M NaCl at 90C. A Rω-(R//CPE) circuit model was applied in the full passive range, where R was the film resistance. This model also applied for a wide range of chloride concentrations and pH values, at the open circuit potential. Two time constants were observed at the beginning and at the end of the passive range. In these cases, the resistances for the ion transfer might be located at the film interfaces, and not in the film itself. The protective properties of the film improved with polarization time due to the thickening and ageing of the film. The film resistance and the space charge layer thickness increased with the potential. The oxidation of Cr3+ to Cr6+ occurred in the film at high potentials, followed by the transpassive dissolution. In the pre-transpassive range of potentials, the film showed a p-type electronic character, while the ionic properties were that of a passive film. The passive film of alloy 22 was an n-type semiconductor, which changed to a p-type for the high passive potentials. ND 2.7 1020 cm-3 and EFB=-0.551 VSCE were determined.
publishDate 2011
dc.date.none.fl_str_mv 2011-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/192637
Rodríguez, Martín Alejandro; Carranza, Ricardo Mario; Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance; Electrochemical Society; Journal of the Electrochemical Society; 158; 6; 6-2011; 221-230
0013-4651
CONICET Digital
CONICET
url http://hdl.handle.net/11336/192637
identifier_str_mv Rodríguez, Martín Alejandro; Carranza, Ricardo Mario; Properties of the passive film on alloy 22 in chloride solutions obtained by electrochemical impedance; Electrochemical Society; Journal of the Electrochemical Society; 158; 6; 6-2011; 221-230
0013-4651
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1149/1.3581034
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Electrochemical Society
publisher.none.fl_str_mv Electrochemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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