Corrosiveness of Ti-Fe-Mo-Mn-Nb-Zr alloys in various pH lactic acids.
- Author:
Sirong YU
1
;
Xinping ZHANG
;
Zhenming HE
;
Yaohui LIU
Author Information
1. College of Materials Science and Engineering, Jilin University, Changchun 130025, China.
- Publication Type:Journal Article
- MeSH:
Corrosion;
Dental Alloys;
chemistry;
Humans;
Hydrogen-Ion Concentration;
Iron;
chemistry;
Lactic Acid;
chemistry;
Manganese;
chemistry;
Molybdenum;
chemistry;
Niobium;
chemistry;
Surface Properties;
Titanium;
chemistry;
Zirconium;
chemistry
- From:
Journal of Biomedical Engineering
2005;22(1):91-94
- CountryChina
- Language:Chinese
-
Abstract:
Variation in pH value of oral cavity circumstance causes decayed tooth. In this paper, corrosions of Ti-Fe-Mo-Mn-Nb-Zr dental alloys in various pH lactic acids were studied by immersion test. In the case of pH=4, which is an acidity slightly larger than that causes decayed tooth, Ti-Fe-Mo-Mn-Nb-Zr alloys are entirely corrosion-resistant, and the corrosion type is pitting. With the increase in acidity, the corrosion-resistance of Ti-Fe-Mo-Mn-Nb-Zr alloys deteriorates, and the corrosion type changes from pitting to intergranular corrosion. Fe ion is the most dissolved substance in impregnation, which means Fe goes against the corrosion-resistance of Ti alloys. Both results of thermodynamics calculation and X-ray photoelectron spectroscopy have shown that Mn2O3, Nb2O5 and TiO2 form oxide film on the surface of Ti-Fe-Mo-Mn-Nb-Zr alloys.
