Publication
Galvanic corrosion of two non noble dental alloys
| dc.contributor.author | Capelo, S. | |
| dc.contributor.author | Proença, L. | |
| dc.contributor.author | Fernandes, J. C. S. | |
| dc.contributor.author | Fonseca, I. T. E. | |
| dc.date.accessioned | 2016-09-19T13:10:59Z | |
| dc.date.available | 2016-09-19T13:10:59Z | |
| dc.date.issued | 2014 | |
| dc.description | Artigo licenciado sob uma Licença Creative Commons: https://creativecommons.org/licenses/by/4.0/ | pt_PT |
| dc.description.abstract | "This study aims to evaluate the corrosion resistance of two nonnoble dental alloys, namely, the Wiron®88 (Ni–Cr–Mo) and the Remanium 2000+ (Co–Cr–Mo–W). A noble alloy, the V-Gnathos® Plus (AuPt) 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 nonnoble 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." | pt_PT |
| dc.identifier.citation | Int. J. Electrochem. Sci., 9 (2014) 593 - 609 | pt_PT |
| dc.identifier.issn | 1452-3981 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/14741 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | ESG | pt_PT |
| dc.relation.publisherversion | http://www.electrochemsci.org/list14.htm#issue2 | pt_PT |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt_PT |
| dc.subject | Dental alloys | pt_PT |
| dc.subject | Wiron®88 | pt_PT |
| dc.subject | Remanium 2000+ | pt_PT |
| dc.subject | Ions release | pt_PT |
| dc.subject | Galvanic couples | pt_PT |
| dc.title | Galvanic corrosion of two non noble dental alloys | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/5876/PEst-OE%2FQUI%2FUI0536%2F2014/PT | |
| oaire.citation.endPage | 609 | pt_PT |
| oaire.citation.startPage | 593 | pt_PT |
| oaire.citation.title | International Journal of Electrochemical Science | pt_PT |
| oaire.citation.volume | 9(2) | pt_PT |
| oaire.fundingStream | 5876 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |
| relation.isProjectOfPublication | b9563f53-8c16-4763-8dc4-97ddc5342efc | |
| relation.isProjectOfPublication.latestForDiscovery | b9563f53-8c16-4763-8dc4-97ddc5342efc |