Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transients
- Autores
- Vásquez Moll, Víctor Dennis; Gennero de Chialvo, Maria Rosa; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
- Año de publicación
- 1985
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The electrochemical behaviour of copper electrodes in NaOH solutions with the addition of Na2S was studied through the analysis of current transients under constant potential and complementary voltammetric and scanning electron microscopy data including energy dispersive X-ray analysis. The overall process can be described by the following three stages. The first stage corresponds to the nucleation and growth of a complex copper sulphide layer at potential values close to the equilibrium potentials of the Cu/Cu2S and Cu/Cu2S reversible electrodes. The second stage is related to the rupture of the copper sulphide film at potentials more positive than a certain critical value leading to pitting corrosion of copper metal and yielding a poorly protective copper sulphide layer. The third stage occurs in the copper oxide electroformation range, where the presence of copper sulphide accelerates the electrodissolution of the base metal and copper oxide hinders the sulphidization processes. The current transients of each stage are interpreted through a model based on the nucleation and growth mechanism.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas - Materia
-
Ciencias Exactas
Química
Copper electrodes
Potentiostatic current transients - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/119252
Ver los metadatos del registro completo
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Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transientsVásquez Moll, Víctor DennisGennero de Chialvo, Maria RosaSalvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaCopper electrodesPotentiostatic current transientsThe electrochemical behaviour of copper electrodes in NaOH solutions with the addition of Na2S was studied through the analysis of current transients under constant potential and complementary voltammetric and scanning electron microscopy data including energy dispersive X-ray analysis. The overall process can be described by the following three stages. The first stage corresponds to the nucleation and growth of a complex copper sulphide layer at potential values close to the equilibrium potentials of the Cu/Cu2S and Cu/Cu<sub>2</sub>S reversible electrodes. The second stage is related to the rupture of the copper sulphide film at potentials more positive than a certain critical value leading to pitting corrosion of copper metal and yielding a poorly protective copper sulphide layer. The third stage occurs in the copper oxide electroformation range, where the presence of copper sulphide accelerates the electrodissolution of the base metal and copper oxide hinders the sulphidization processes. The current transients of each stage are interpreted through a model based on the nucleation and growth mechanism.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1985info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1011-1016http://sedici.unlp.edu.ar/handle/10915/119252enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(85)80165-1info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:28:09Zoai:sedici.unlp.edu.ar:10915/119252Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:28:09.722SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transients |
title |
Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transients |
spellingShingle |
Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transients Vásquez Moll, Víctor Dennis Ciencias Exactas Química Copper electrodes Potentiostatic current transients |
title_short |
Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transients |
title_full |
Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transients |
title_fullStr |
Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transients |
title_full_unstemmed |
Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transients |
title_sort |
Corrosion and passivity of copper in solutions containing sodium sulphide : Analysis of potentiostatic current transients |
dc.creator.none.fl_str_mv |
Vásquez Moll, Víctor Dennis Gennero de Chialvo, Maria Rosa Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author |
Vásquez Moll, Víctor Dennis |
author_facet |
Vásquez Moll, Víctor Dennis Gennero de Chialvo, Maria Rosa Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author_role |
author |
author2 |
Gennero de Chialvo, Maria Rosa Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Ciencias Exactas Química Copper electrodes Potentiostatic current transients |
topic |
Ciencias Exactas Química Copper electrodes Potentiostatic current transients |
dc.description.none.fl_txt_mv |
The electrochemical behaviour of copper electrodes in NaOH solutions with the addition of Na2S was studied through the analysis of current transients under constant potential and complementary voltammetric and scanning electron microscopy data including energy dispersive X-ray analysis. The overall process can be described by the following three stages. The first stage corresponds to the nucleation and growth of a complex copper sulphide layer at potential values close to the equilibrium potentials of the Cu/Cu2S and Cu/Cu<sub>2</sub>S reversible electrodes. The second stage is related to the rupture of the copper sulphide film at potentials more positive than a certain critical value leading to pitting corrosion of copper metal and yielding a poorly protective copper sulphide layer. The third stage occurs in the copper oxide electroformation range, where the presence of copper sulphide accelerates the electrodissolution of the base metal and copper oxide hinders the sulphidization processes. The current transients of each stage are interpreted through a model based on the nucleation and growth mechanism. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
description |
The electrochemical behaviour of copper electrodes in NaOH solutions with the addition of Na2S was studied through the analysis of current transients under constant potential and complementary voltammetric and scanning electron microscopy data including energy dispersive X-ray analysis. The overall process can be described by the following three stages. The first stage corresponds to the nucleation and growth of a complex copper sulphide layer at potential values close to the equilibrium potentials of the Cu/Cu2S and Cu/Cu<sub>2</sub>S reversible electrodes. The second stage is related to the rupture of the copper sulphide film at potentials more positive than a certain critical value leading to pitting corrosion of copper metal and yielding a poorly protective copper sulphide layer. The third stage occurs in the copper oxide electroformation range, where the presence of copper sulphide accelerates the electrodissolution of the base metal and copper oxide hinders the sulphidization processes. The current transients of each stage are interpreted through a model based on the nucleation and growth mechanism. |
publishDate |
1985 |
dc.date.none.fl_str_mv |
1985 |
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/10915/119252 |
url |
http://sedici.unlp.edu.ar/handle/10915/119252 |
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(85)80165-1 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
dc.format.none.fl_str_mv |
application/pdf 1011-1016 |
dc.source.none.fl_str_mv |
reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP |
reponame_str |
SEDICI (UNLP) |
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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 |
13.070432 |