Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis

Detalhes bibliográficos
Autor(a) principal: Acciari, Heloísa A.
Data de Publicação: 2005
Outros Autores: Guastaldi, Antonio C., Brett, Christopher M. A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/5108
https://doi.org/10.1016/j.corsci.2004.07.004
Resumo: The corrosion resistance of three of the constituent phases in high copper dental amalgams has been investigated by electrochemical methods in 0.9% NaCl solution. Polarization curves show corrosion potentials most positive for [gamma]1-Ag2Hg3, followed by Ag-Cu, and [gamma]-Ag3Sn in agreement with the order of corrosion resistance deduced from the corrosion currents. Complex plane impedance plots at the open circuit potential showed distorted semicircles with diffusional components at low frequency for Ag-Hg and Ag-Cu, while for [gamma]-Ag3Sn a layer of corrosion products is formed, partially or completely covering the surface of the electrode. Impedance and noise spectra have been compared in the frequency domain, and show good agreement.
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spelling Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysisA. Dental amalgamsA. Amalgam phasesB. Electrochemical impedance spectroscopy (EIS)B. Electrochemical noise analysisC. Chloride corrosionThe corrosion resistance of three of the constituent phases in high copper dental amalgams has been investigated by electrochemical methods in 0.9% NaCl solution. Polarization curves show corrosion potentials most positive for [gamma]1-Ag2Hg3, followed by Ag-Cu, and [gamma]-Ag3Sn in agreement with the order of corrosion resistance deduced from the corrosion currents. Complex plane impedance plots at the open circuit potential showed distorted semicircles with diffusional components at low frequency for Ag-Hg and Ag-Cu, while for [gamma]-Ag3Sn a layer of corrosion products is formed, partially or completely covering the surface of the electrode. Impedance and noise spectra have been compared in the frequency domain, and show good agreement.http://www.sciencedirect.com/science/article/B6TWS-4D34H91-7/1/1c31fd7e4eb4d8227922e2c0bfcd852c2005info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/5108http://hdl.handle.net/10316/5108https://doi.org/10.1016/j.corsci.2004.07.004engCorrosion Science. 47:3 (2005) 635-647Acciari, Heloísa A.Guastaldi, Antonio C.Brett, Christopher M. A.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2021-07-27T09:46:22Zoai:estudogeral.uc.pt:10316/5108Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:19.038909Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis
title Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis
spellingShingle Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis
Acciari, Heloísa A.
A. Dental amalgams
A. Amalgam phases
B. Electrochemical impedance spectroscopy (EIS)
B. Electrochemical noise analysis
C. Chloride corrosion
title_short Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis
title_full Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis
title_fullStr Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis
title_full_unstemmed Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis
title_sort Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis
author Acciari, Heloísa A.
author_facet Acciari, Heloísa A.
Guastaldi, Antonio C.
Brett, Christopher M. A.
author_role author
author2 Guastaldi, Antonio C.
Brett, Christopher M. A.
author2_role author
author
dc.contributor.author.fl_str_mv Acciari, Heloísa A.
Guastaldi, Antonio C.
Brett, Christopher M. A.
dc.subject.por.fl_str_mv A. Dental amalgams
A. Amalgam phases
B. Electrochemical impedance spectroscopy (EIS)
B. Electrochemical noise analysis
C. Chloride corrosion
topic A. Dental amalgams
A. Amalgam phases
B. Electrochemical impedance spectroscopy (EIS)
B. Electrochemical noise analysis
C. Chloride corrosion
description The corrosion resistance of three of the constituent phases in high copper dental amalgams has been investigated by electrochemical methods in 0.9% NaCl solution. Polarization curves show corrosion potentials most positive for [gamma]1-Ag2Hg3, followed by Ag-Cu, and [gamma]-Ag3Sn in agreement with the order of corrosion resistance deduced from the corrosion currents. Complex plane impedance plots at the open circuit potential showed distorted semicircles with diffusional components at low frequency for Ag-Hg and Ag-Cu, while for [gamma]-Ag3Sn a layer of corrosion products is formed, partially or completely covering the surface of the electrode. Impedance and noise spectra have been compared in the frequency domain, and show good agreement.
publishDate 2005
dc.date.none.fl_str_mv 2005
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/5108
http://hdl.handle.net/10316/5108
https://doi.org/10.1016/j.corsci.2004.07.004
url http://hdl.handle.net/10316/5108
https://doi.org/10.1016/j.corsci.2004.07.004
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Corrosion Science. 47:3 (2005) 635-647
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv aplication/PDF
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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