Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution
- Autores
- Souto, Ricardo M.; González, Sergio G.; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
- Año de publicación
- 1994
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The electrochemical behaviour of Cu in alkaline solutions containing Na2SO4 was studied using potentiodynamic and potentiostatic techniques complemented by scanning electron microscopy. The presence of Na2SO4 enhances Cu electrodissolution through the passive layer and decreases the breakdown potential. There is a critical OH-/sulphate concentration ratio for the onset of localized corrosion. The competitive interaction between OH- and sulphate ions at the passive layer can explain the experimental data. Pit initiation fits the point defect model for passivity breakdown. Pit growth involves a number of current contributions which can be distinguished through the analysis of current transients at constant potential by using nucleation and growth models.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas - Materia
-
Ciencias Exactas
Química
Cobre
Metales Alcalinos
Sulfatos
Sodio
scanning electron microscopy
electrodissolution
Cinética química
Electroquímica - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/86541
Ver los metadatos del registro completo
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Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solutionSouto, Ricardo M.González, Sergio G.Salvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaCobreMetales AlcalinosSulfatosSodioscanning electron microscopyelectrodissolutionCinética químicaElectroquímicaThe electrochemical behaviour of Cu in alkaline solutions containing Na<sub>2</sub>SO<sub>4</sub> was studied using potentiodynamic and potentiostatic techniques complemented by scanning electron microscopy. The presence of Na<sub>2</sub>SO<sub>4</sub> enhances Cu electrodissolution through the passive layer and decreases the breakdown potential. There is a critical OH<sup>-</sup>/sulphate concentration ratio for the onset of localized corrosion. The competitive interaction between OH<sup>-</sup> and sulphate ions at the passive layer can explain the experimental data. Pit initiation fits the point defect model for passivity breakdown. Pit growth involves a number of current contributions which can be distinguished through the analysis of current transients at constant potential by using nucleation and growth models.Instituto de Investigaciones Fisicoquímicas Teóricas y AplicadasFacultad de Ciencias Exactas1994-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf2619-2628http://sedici.unlp.edu.ar/handle/10915/86541enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(94)00204-5info: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:UNLP2025-10-15T11:09:01Zoai:sedici.unlp.edu.ar:10915/86541Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:09:02.093SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution |
| title |
Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution |
| spellingShingle |
Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution Souto, Ricardo M. Ciencias Exactas Química Cobre Metales Alcalinos Sulfatos Sodio scanning electron microscopy electrodissolution Cinética química Electroquímica |
| title_short |
Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution |
| title_full |
Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution |
| title_fullStr |
Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution |
| title_full_unstemmed |
Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution |
| title_sort |
Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution |
| dc.creator.none.fl_str_mv |
Souto, Ricardo M. González, Sergio G. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author |
Souto, Ricardo M. |
| author_facet |
Souto, Ricardo M. González, Sergio G. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author_role |
author |
| author2 |
González, Sergio G. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Química Cobre Metales Alcalinos Sulfatos Sodio scanning electron microscopy electrodissolution Cinética química Electroquímica |
| topic |
Ciencias Exactas Química Cobre Metales Alcalinos Sulfatos Sodio scanning electron microscopy electrodissolution Cinética química Electroquímica |
| dc.description.none.fl_txt_mv |
The electrochemical behaviour of Cu in alkaline solutions containing Na<sub>2</sub>SO<sub>4</sub> was studied using potentiodynamic and potentiostatic techniques complemented by scanning electron microscopy. The presence of Na<sub>2</sub>SO<sub>4</sub> enhances Cu electrodissolution through the passive layer and decreases the breakdown potential. There is a critical OH<sup>-</sup>/sulphate concentration ratio for the onset of localized corrosion. The competitive interaction between OH<sup>-</sup> and sulphate ions at the passive layer can explain the experimental data. Pit initiation fits the point defect model for passivity breakdown. Pit growth involves a number of current contributions which can be distinguished through the analysis of current transients at constant potential by using nucleation and growth models. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas Facultad de Ciencias Exactas |
| description |
The electrochemical behaviour of Cu in alkaline solutions containing Na<sub>2</sub>SO<sub>4</sub> was studied using potentiodynamic and potentiostatic techniques complemented by scanning electron microscopy. The presence of Na<sub>2</sub>SO<sub>4</sub> enhances Cu electrodissolution through the passive layer and decreases the breakdown potential. There is a critical OH<sup>-</sup>/sulphate concentration ratio for the onset of localized corrosion. The competitive interaction between OH<sup>-</sup> and sulphate ions at the passive layer can explain the experimental data. Pit initiation fits the point defect model for passivity breakdown. Pit growth involves a number of current contributions which can be distinguished through the analysis of current transients at constant potential by using nucleation and growth models. |
| publishDate |
1994 |
| dc.date.none.fl_str_mv |
1994-12 |
| 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 |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/86541 |
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http://sedici.unlp.edu.ar/handle/10915/86541 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
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info:eu-repo/semantics/altIdentifier/issn/0013-4686 info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(94)00204-5 |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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openAccess |
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application/pdf 2619-2628 |
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