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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/119252
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/119252
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling 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:UNLP2025-10-22T17:09:00Zoai: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:13292025-10-22 17:09:01.252SEDICI (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)
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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