Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositions

Autores
Fernández Lorenzo de Mele, Mónica Alicia; Duffó, G.
Año de publicación
2002
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The aim of this work is to study the electrochemical response of Ag and Ag-based alloys in synthetic salivas of different compositions. The effect of several anions present in saliva on the dissolution of Ag and some of the alloy components, such as Pd and Cu, was evaluated. Potentiostatic and potentiodynamic techniques were used and were complemented with atomic adsorption and XPS analysis. Chloride, fluoride and thiocyanate were particularly analysed because of their aggressiveness. Corrosion, pigmentation and/or tarnishing processes were enhanced when they were present in the synthetic saliva. A dependence of the selectivity of Pd dissolution from Ag–15Pd binary alloy with the potential was noticed. Ag microsegregations and precipitates formed on casting alloys showed higher activity than the matrix and rendered the alloy more susceptibility to deterioration. The need to use a normalised saliva to make comparisons of electrochemical results is highlighted.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Química
Física
Corrosión
Palladium
Silver
Synthetic saliva
Tarnishing
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:10915/143313
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/143313
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositionsFernández Lorenzo de Mele, Mónica AliciaDuffó, G.QuímicaFísicaCorrosiónPalladiumSilverSynthetic salivaTarnishingThe aim of this work is to study the electrochemical response of Ag and Ag-based alloys in synthetic salivas of different compositions. The effect of several anions present in saliva on the dissolution of Ag and some of the alloy components, such as Pd and Cu, was evaluated. Potentiostatic and potentiodynamic techniques were used and were complemented with atomic adsorption and XPS analysis. Chloride, fluoride and thiocyanate were particularly analysed because of their aggressiveness. Corrosion, pigmentation and/or tarnishing processes were enhanced when they were present in the synthetic saliva. A dependence of the selectivity of Pd dissolution from Ag–15Pd binary alloy with the potential was noticed. Ag microsegregations and precipitates formed on casting alloys showed higher activity than the matrix and rendered the alloy more susceptibility to deterioration. The need to use a normalised saliva to make comparisons of electrochemical results is highlighted.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2002info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf157-164http://sedici.unlp.edu.ar/handle/10915/143313enginfo:eu-repo/semantics/altIdentifier/issn/0021-891Xinfo:eu-repo/semantics/altIdentifier/issn/1572-8838info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1014782414560info: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:UNLP2025-09-29T11:32:12Zoai:sedici.unlp.edu.ar:10915/143313Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:12.31SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositions
title Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositions
spellingShingle Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositions
Fernández Lorenzo de Mele, Mónica Alicia
Química
Física
Corrosión
Palladium
Silver
Synthetic saliva
Tarnishing
title_short Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositions
title_full Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositions
title_fullStr Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositions
title_full_unstemmed Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositions
title_sort Tarnishing and corrosion of silver-based casting alloys in synthetic salivas of different compositions
dc.creator.none.fl_str_mv Fernández Lorenzo de Mele, Mónica Alicia
Duffó, G.
author Fernández Lorenzo de Mele, Mónica Alicia
author_facet Fernández Lorenzo de Mele, Mónica Alicia
Duffó, G.
author_role author
author2 Duffó, G.
author2_role author
dc.subject.none.fl_str_mv Química
Física
Corrosión
Palladium
Silver
Synthetic saliva
Tarnishing
topic Química
Física
Corrosión
Palladium
Silver
Synthetic saliva
Tarnishing
dc.description.none.fl_txt_mv The aim of this work is to study the electrochemical response of Ag and Ag-based alloys in synthetic salivas of different compositions. The effect of several anions present in saliva on the dissolution of Ag and some of the alloy components, such as Pd and Cu, was evaluated. Potentiostatic and potentiodynamic techniques were used and were complemented with atomic adsorption and XPS analysis. Chloride, fluoride and thiocyanate were particularly analysed because of their aggressiveness. Corrosion, pigmentation and/or tarnishing processes were enhanced when they were present in the synthetic saliva. A dependence of the selectivity of Pd dissolution from Ag–15Pd binary alloy with the potential was noticed. Ag microsegregations and precipitates formed on casting alloys showed higher activity than the matrix and rendered the alloy more susceptibility to deterioration. The need to use a normalised saliva to make comparisons of electrochemical results is highlighted.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The aim of this work is to study the electrochemical response of Ag and Ag-based alloys in synthetic salivas of different compositions. The effect of several anions present in saliva on the dissolution of Ag and some of the alloy components, such as Pd and Cu, was evaluated. Potentiostatic and potentiodynamic techniques were used and were complemented with atomic adsorption and XPS analysis. Chloride, fluoride and thiocyanate were particularly analysed because of their aggressiveness. Corrosion, pigmentation and/or tarnishing processes were enhanced when they were present in the synthetic saliva. A dependence of the selectivity of Pd dissolution from Ag–15Pd binary alloy with the potential was noticed. Ag microsegregations and precipitates formed on casting alloys showed higher activity than the matrix and rendered the alloy more susceptibility to deterioration. The need to use a normalised saliva to make comparisons of electrochemical results is highlighted.
publishDate 2002
dc.date.none.fl_str_mv 2002
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/10915/143313
url http://sedici.unlp.edu.ar/handle/10915/143313
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0021-891X
info:eu-repo/semantics/altIdentifier/issn/1572-8838
info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1014782414560
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
157-164
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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