A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data

Autores
Morales, Jose Carlos; Fernández, Guillermina T.; Esparza, Pedro; González, Sergio G.; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
Año de publicación
1995
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The passivation and localized corrosion of α-, β-, and (α + β)-brass in borate-boric acid buffer solutions (pH 9) containing different NaCl concentrations (cNaCl) were studied comparatively using conventional electrochemical techniques at 25 °C. The passivation of brass in borate-boric acid buffer was due to the electroformation of a complex passive layer consisting of ZnO · xH2O and Cu2O—CuO. In NaCl-containing borate-boric acid buffer the breakdown of the passive layer occurs leading to pitting corrosion when the applied potential exceeds a certain critical value, Eb. For a given type of brass, the value of Eb is shifted negatively as cNaCl is increased. At a constant cNaCl the localized corrosion resistance of brass increases in the following order (α + β)-brass ≅ β-brass < α-brass. For all brass the localized corrosion resistance was lower than that of polycrystalline Cu, but considerably greater than that of polycrystalline Zn. Passive film composition and de-alloying can account for the localized corrosion resistance of these alloys.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Química
Boratos
Cloruro de Sodio
Electroquímica
Corrosión
Boricum Acidum
Ácidos Bóricos
Técnicas Electroquímicas
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/80404
Acceder
id SEDICI_b2aa5e800851e607996c2cdde737f40f
oai_identifier_str oai:sedici.unlp.edu.ar:10915/80404
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical dataMorales, Jose CarlosFernández, Guillermina T.Esparza, PedroGonzález, Sergio G.Salvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaBoratosCloruro de SodioElectroquímicaCorrosiónBoricum AcidumÁcidos BóricosTécnicas ElectroquímicasThe passivation and localized corrosion of α-, β-, and (α + β)-brass in borate-boric acid buffer solutions (pH 9) containing different NaCl concentrations (c<sub>NaCl</sub>) were studied comparatively using conventional electrochemical techniques at 25 °C. The passivation of brass in borate-boric acid buffer was due to the electroformation of a complex passive layer consisting of ZnO · xH<sub>2</sub>O and Cu<sub>2</sub>O—CuO. In NaCl-containing borate-boric acid buffer the breakdown of the passive layer occurs leading to pitting corrosion when the applied potential exceeds a certain critical value, E<sub>b</sub>. For a given type of brass, the value of E<sub>b</sub> is shifted negatively as c<sub>NaCl</sub> is increased. At a constant c<sub>NaCl</sub> the localized corrosion resistance of brass increases in the following order (α + β)-brass ≅ β-brass < α-brass. For all brass the localized corrosion resistance was lower than that of polycrystalline Cu, but considerably greater than that of polycrystalline Zn. Passive film composition and de-alloying can account for the localized corrosion resistance of these alloys.Instituto de Investigaciones Fisicoquímicas Teóricas y AplicadasFacultad de Ciencias Exactas1995-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf211-229http://sedici.unlp.edu.ar/handle/10915/80404enginfo:eu-repo/semantics/altIdentifier/issn/0010-938Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/0010-938X(94)00108-Iinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:55:40Zoai:sedici.unlp.edu.ar:10915/80404Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:55:40.472SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data
title A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data
spellingShingle A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data
Morales, Jose Carlos
Ciencias Exactas
Química
Boratos
Cloruro de Sodio
Electroquímica
Corrosión
Boricum Acidum
Ácidos Bóricos
Técnicas Electroquímicas
title_short A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data
title_full A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data
title_fullStr A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data
title_full_unstemmed A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data
title_sort A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data
dc.creator.none.fl_str_mv Morales, Jose Carlos
Fernández, Guillermina T.
Esparza, Pedro
González, Sergio G.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author Morales, Jose Carlos
author_facet Morales, Jose Carlos
Fernández, Guillermina T.
Esparza, Pedro
González, Sergio G.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_role author
author2 Fernández, Guillermina T.
Esparza, Pedro
González, Sergio G.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Boratos
Cloruro de Sodio
Electroquímica
Corrosión
Boricum Acidum
Ácidos Bóricos
Técnicas Electroquímicas
topic Ciencias Exactas
Química
Boratos
Cloruro de Sodio
Electroquímica
Corrosión
Boricum Acidum
Ácidos Bóricos
Técnicas Electroquímicas
dc.description.none.fl_txt_mv The passivation and localized corrosion of α-, β-, and (α + β)-brass in borate-boric acid buffer solutions (pH 9) containing different NaCl concentrations (c<sub>NaCl</sub>) were studied comparatively using conventional electrochemical techniques at 25 °C. The passivation of brass in borate-boric acid buffer was due to the electroformation of a complex passive layer consisting of ZnO · xH<sub>2</sub>O and Cu<sub>2</sub>O—CuO. In NaCl-containing borate-boric acid buffer the breakdown of the passive layer occurs leading to pitting corrosion when the applied potential exceeds a certain critical value, E<sub>b</sub>. For a given type of brass, the value of E<sub>b</sub> is shifted negatively as c<sub>NaCl</sub> is increased. At a constant c<sub>NaCl</sub> the localized corrosion resistance of brass increases in the following order (α + β)-brass ≅ β-brass < α-brass. For all brass the localized corrosion resistance was lower than that of polycrystalline Cu, but considerably greater than that of polycrystalline Zn. Passive film composition and de-alloying can account for the localized corrosion resistance of these alloys.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
description The passivation and localized corrosion of α-, β-, and (α + β)-brass in borate-boric acid buffer solutions (pH 9) containing different NaCl concentrations (c<sub>NaCl</sub>) were studied comparatively using conventional electrochemical techniques at 25 °C. The passivation of brass in borate-boric acid buffer was due to the electroformation of a complex passive layer consisting of ZnO · xH<sub>2</sub>O and Cu<sub>2</sub>O—CuO. In NaCl-containing borate-boric acid buffer the breakdown of the passive layer occurs leading to pitting corrosion when the applied potential exceeds a certain critical value, E<sub>b</sub>. For a given type of brass, the value of E<sub>b</sub> is shifted negatively as c<sub>NaCl</sub> is increased. At a constant c<sub>NaCl</sub> the localized corrosion resistance of brass increases in the following order (α + β)-brass ≅ β-brass < α-brass. For all brass the localized corrosion resistance was lower than that of polycrystalline Cu, but considerably greater than that of polycrystalline Zn. Passive film composition and de-alloying can account for the localized corrosion resistance of these alloys.
publishDate 1995
dc.date.none.fl_str_mv 1995-02
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/10915/80404
url http://sedici.unlp.edu.ar/handle/10915/80404
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0010-938X
info:eu-repo/semantics/altIdentifier/doi/10.1016/0010-938X(94)00108-I
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
211-229
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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