Galvanic Corrosion of Two Non Noble Dental Alloys

Detalhes bibliográficos
Autor(a) principal: Capelo, Sofia
Data de Publicação: 2013
Outros Autores: Proença, L, Fernandes, JCS, Fonseca, ITE
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/9802
Resumo: This study aims to evaluate the corrosion resistance of two nonnoble dental alloys, namely, the Wiron®88 (Ni–Cr–Mo) and the Remanium 2000+ (Co–Cr–Mo–W). A noble alloy, the V-Gnathos® Plus (AuPt) previously studied was also considered for the purpose of comparison. The study was conducted in artificial saliva, pH 7.1, at 37 °C, by cyclic and linear sweep voltammetry, electrochemical impedance spectroscopy and chronoamperometry. The Rp value of the alloy of high contents of Ni, the Wiron®88, was 26.2±0.2 kΩ cm2 and of the one with high contents of Co, the Remanium 2000+, was 22.5±0.6 kΩ cm2. Data from linear polarization resistance and electrochemical impedance spectroscopy lead to the same order for the resistance against corrosion. The order from the less to the more reactive alloy is: Wiron®88 → Remanium 2000+. The galvanic cell obtained by coupling the two nonnoble alloys presents very low cell potential (a few mV, -18 mV), while the galvanic cell between one noble alloy (the V-Gnathos® Plus) and the Wiron®88 showed a higher cell potential (-104 mV). Both galvanic couples, under short circuit, have lead to the release of cations, namely, Co2+, in the case of the Wiron®88|Remanium 2000+ and Ni2+ for the Wiron®88|V-Gnathos® Plus, galvanic couples, respectively, with the ionic concentrations reaching values of 12.15 and 7.30 μg L-1 (7.30 ppb), respectively. SEM micrographs obtained after 25 days immersion in artificial saliva, at 37 °C, showed the formation of well-defined pits on the surface of the two non-noble alloys.
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spelling Galvanic Corrosion of Two Non Noble Dental Alloysdental alloysWiron®88Remanium 2000+ions releasegalvanic couplesThis study aims to evaluate the corrosion resistance of two nonnoble dental alloys, namely, the Wiron®88 (Ni–Cr–Mo) and the Remanium 2000+ (Co–Cr–Mo–W). A noble alloy, the V-Gnathos® Plus (AuPt) previously studied was also considered for the purpose of comparison. The study was conducted in artificial saliva, pH 7.1, at 37 °C, by cyclic and linear sweep voltammetry, electrochemical impedance spectroscopy and chronoamperometry. The Rp value of the alloy of high contents of Ni, the Wiron®88, was 26.2±0.2 kΩ cm2 and of the one with high contents of Co, the Remanium 2000+, was 22.5±0.6 kΩ cm2. Data from linear polarization resistance and electrochemical impedance spectroscopy lead to the same order for the resistance against corrosion. The order from the less to the more reactive alloy is: Wiron®88 → Remanium 2000+. The galvanic cell obtained by coupling the two nonnoble alloys presents very low cell potential (a few mV, -18 mV), while the galvanic cell between one noble alloy (the V-Gnathos® Plus) and the Wiron®88 showed a higher cell potential (-104 mV). Both galvanic couples, under short circuit, have lead to the release of cations, namely, Co2+, in the case of the Wiron®88|Remanium 2000+ and Ni2+ for the Wiron®88|V-Gnathos® Plus, galvanic couples, respectively, with the ionic concentrations reaching values of 12.15 and 7.30 μg L-1 (7.30 ppb), respectively. SEM micrographs obtained after 25 days immersion in artificial saliva, at 37 °C, showed the formation of well-defined pits on the surface of the two non-noble alloys.ESG2014-01-20T18:17:15Z2014-01-202013-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/9802http://hdl.handle.net/10174/9802porCapelo S., Proença L., Fernandes J.C.S., Fonseca I.T.E., (2014) Galvanic corrosion of two non noble dental alloys, International Journal of Electrochemical Science, 9: 593 – 6091452-3981scapelo@uevora.ptlfproenca@fc.ul.ptjoao.salvador@ist.utl.ptitfonseca@fc.ul.pt304Capelo, SofiaProença, LFernandes, JCSFonseca, ITEinfo: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:RCAAP2024-01-03T18:51:59Zoai:dspace.uevora.pt:10174/9802Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:03:47.166220Repositório 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 Galvanic Corrosion of Two Non Noble Dental Alloys
title Galvanic Corrosion of Two Non Noble Dental Alloys
spellingShingle Galvanic Corrosion of Two Non Noble Dental Alloys
Capelo, Sofia
dental alloys
Wiron®88
Remanium 2000+
ions release
galvanic couples
title_short Galvanic Corrosion of Two Non Noble Dental Alloys
title_full Galvanic Corrosion of Two Non Noble Dental Alloys
title_fullStr Galvanic Corrosion of Two Non Noble Dental Alloys
title_full_unstemmed Galvanic Corrosion of Two Non Noble Dental Alloys
title_sort Galvanic Corrosion of Two Non Noble Dental Alloys
author Capelo, Sofia
author_facet Capelo, Sofia
Proença, L
Fernandes, JCS
Fonseca, ITE
author_role author
author2 Proença, L
Fernandes, JCS
Fonseca, ITE
author2_role author
author
author
dc.contributor.author.fl_str_mv Capelo, Sofia
Proença, L
Fernandes, JCS
Fonseca, ITE
dc.subject.por.fl_str_mv dental alloys
Wiron®88
Remanium 2000+
ions release
galvanic couples
topic dental alloys
Wiron®88
Remanium 2000+
ions release
galvanic couples
description This study aims to evaluate the corrosion resistance of two nonnoble dental alloys, namely, the Wiron®88 (Ni–Cr–Mo) and the Remanium 2000+ (Co–Cr–Mo–W). A noble alloy, the V-Gnathos® Plus (AuPt) previously studied was also considered for the purpose of comparison. The study was conducted in artificial saliva, pH 7.1, at 37 °C, by cyclic and linear sweep voltammetry, electrochemical impedance spectroscopy and chronoamperometry. The Rp value of the alloy of high contents of Ni, the Wiron®88, was 26.2±0.2 kΩ cm2 and of the one with high contents of Co, the Remanium 2000+, was 22.5±0.6 kΩ cm2. Data from linear polarization resistance and electrochemical impedance spectroscopy lead to the same order for the resistance against corrosion. The order from the less to the more reactive alloy is: Wiron®88 → Remanium 2000+. The galvanic cell obtained by coupling the two nonnoble alloys presents very low cell potential (a few mV, -18 mV), while the galvanic cell between one noble alloy (the V-Gnathos® Plus) and the Wiron®88 showed a higher cell potential (-104 mV). Both galvanic couples, under short circuit, have lead to the release of cations, namely, Co2+, in the case of the Wiron®88|Remanium 2000+ and Ni2+ for the Wiron®88|V-Gnathos® Plus, galvanic couples, respectively, with the ionic concentrations reaching values of 12.15 and 7.30 μg L-1 (7.30 ppb), respectively. SEM micrographs obtained after 25 days immersion in artificial saliva, at 37 °C, showed the formation of well-defined pits on the surface of the two non-noble alloys.
publishDate 2013
dc.date.none.fl_str_mv 2013-01-01T00:00:00Z
2014-01-20T18:17:15Z
2014-01-20
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/10174/9802
http://hdl.handle.net/10174/9802
url http://hdl.handle.net/10174/9802
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Capelo S., Proença L., Fernandes J.C.S., Fonseca I.T.E., (2014) Galvanic corrosion of two non noble dental alloys, International Journal of Electrochemical Science, 9: 593 – 609
1452-3981
scapelo@uevora.pt
lfproenca@fc.ul.pt
joao.salvador@ist.utl.pt
itfonseca@fc.ul.pt
304
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