Corrosion behavior of Ti-Ag alloys used in dentistry in lactic acid solution

• DOI: 10.1007/s12540-011-0224-y
• Publication Date: 2011-03-10T09:10:13Z
• Authors: Masatoshi Takahashi; Masafumi Kikuchi; Yukyo Takada
• Keywords: 0205 materials engineering; 02 engineering and technology

The purpose of this study was to evaluate the corrosion resistance of experimental Ti-Ag alloys used as dental materials. An elution test and a rest-potential measurement of alloys with 5–30 mass.% Ag were performed in a 1 % lactic acid solution. The amount of Ti ions released from the α phase of the Ti-Ag alloys decreased as the Ag concentration increased. TiAg present in the alloys dissolved preferentially, but Ti2Ag did not. The rest potentials of the Ti-Ag alloys were significantly higher than that of pure titanium. The elution test and the rest-potential measurement revealed that the Ti-Ag alloys, which formed a single α-titanium structure or contained a titanium and Ti2Ag, had excellent corrosion resistance that was comparable or superior to that of pure titanium.