An Investigation of the Corrosion Characteristics of Dental Alloys
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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Cathodic linear polarization behavior of six commercially-available dental alloys was investigated galvanostatically in an aerated synthetic saliva electrolyte, at 22 plus or minus 1C. Each alloy was investigated with three different surface finishes. Complete potentiostatic polarization tests were also conducted and anodic Tafel slopes were obtained for these six dental alloys. Corrosion rate calculations were performed. In general, the corrosion rates of all of the dental alloys were very low. The gold alloys had the lowest corrosion rates while the amalgams had the highest. All corrosion rates reached steady-state values within 48 to 96 hours. Corrosion rates of each of the alloys decreased as the smoothness of the surface finish increased the corrosion rates of the amalgams showed the greatest dependence on surface finish.
- Properties of Metals and Alloys