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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/192637
Ver los metadatos del registro completo
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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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1844613942569074688 |
score |
13.070432 |