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Galvanic Corrosion of Dental Alloys and Amalgam in Artificial Saliva Containing Citric Acid | ||
| Engineering and Technology Journal | ||
| Article 8, Volume 31, Issue 12, 2013, Pages 2299-2310 PDF (732.92 K) | ||
| DOI: 10.30684/etj.31.12A.8 | ||
| Author | ||
| Rana A. Majed | ||
| Abstract | ||
| In this work galvanic corrosion potentials and currents were measured using polarization curves of some dental alloys (amalgam, Co-Cr-Mo, Ni-Cr-Mo, SS 316L, Ti- 6Al-4V alloys) in artificial saliva containing citric acid with three concentrations 3,6 and 9 g/l at 37oC. All galvanic corrosion data were measured to coupling of amalgam and other alloys to investigate the galvanic corrosion between filling and other dental devices such as partial-denture framework, crowns, bridges, and endodontic instruments. The results of galvanic corrosion show that the coupling between amalgam and Ni- Cr-Mo alloy gives higher galvanic corrosion current than other metallic contact, and then the contact between amalgam and Co-Cr-Mo alloy was heavier compared with coupling of SS 316L and Ti-6Al-4V alloy with amalgam. The increasing of corrosion for alloys containing chromium due to rapidly converting of Cr6+ to Cr3+ and this phenomenon decreases the concentration of chromium ions at surface and then increases the dissolution of metal atoms, while decreasing of galvanic corrosion of Ti-alloy coupled with amalgam due to the passive oxide surface layer (TiO2). | ||
| Keywords | ||
| Amalgam; Dental Alloys; Citric acid; Galvanic Corrosion in Saliva | ||
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