Corrosion resistance of a new Ti-12. 5Zr-3Nb-2. 5Sn alloy
10.3760/cma.j.issn.1002-0098.2010.09.015
- VernacularTitle:新型钛锆铌锡合金的耐蚀性研究
- Author:
Xin HU
1
;
Qiang WEI
;
Chang-Yi LI
;
Jia-Yin DENG
;
Shuang LIU
;
Lian-Yun ZHANG
Author Information
1. 天津医科大学口腔医院
- Keywords:
Titanium;
Alloys;
Electrochemistry;
Corrosion resistance
- From:
Chinese Journal of Stomatology
2010;45(9):569-572
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the corrosion resistance of a new titanium alloy for dental restoration in artificial saliva. Methods In simulated oral environment, the electrochemical behavior of a new titanium alloy(Ti-12. 5Zr-3Nb-2. 5Sn) for dental restoration based on the d-electron alloy design method with high elastic modulus, high mechanical and good biological safety properties was investigated together with that of Ti-6Al-4V and TA2 as control groups. The anodic polarization curve and polarization resistance of these alloys were analyzed and the element release of Ti-12.5Zr-3Nb-2.5Sn and Ti-6Al-4V alloy after immersion in artificial saliva for 1,2,3,5,7,15 d were measured. Results Polarization curve indicated that Ti-6Al-4V alloy had lower breakdown potential(0. 8 V) than Ti-12. 5Zr-3Nb-2. 5Sn alloy did (>2. 5 V) . Ti-6A1-4V alloy showed higher passivation current density (1.45 × 10-4 -1.09 × 10-3 A/cm2) than Ti-12. 5Zr-3Nb-2. 5Sn alloy(3. 32 × 10-6-3.46 × 10-5 A/cm2) and TA2(5. 03 × 10-6-2. 65 × 10-5 A/cm2) did. Polarization resistance results showed that polarization resistance volume of TA2, Ti-12. 5Zr-3Nb-2. 5Sn alloy and Ti-6Al-4V alloy were 371.0, 252.0, and 60. 1 kΩ · cm2 respectively. With the increasing of dipping time in artificial saliva, the ion release of Ti-12. 5Zr-3Nb-2. 5Sn alloy and Ti-6Al-4V alloy increased to different degrees. Ti-6Al-4V alloy always showed more ion release than Ti-12. 5Zr-3Nb-2. 5Sn alloy did in the experiment. Conclusions Data from this study indicated that Ti-12. 5Zr-3Nb-2. 5Sn alloy, as a dental restoration material, had good corrosion resistance in artificial saliva.
