Corrosiveness of Ti-Fe-Mo-Mn-Nb-Zr alloys in various pH lactic acids / 生物医学工程学杂志
Journal of Biomedical Engineering
;
(6): 91-94, 2005.
Article
in Chinese
| WPRIM
| ID: wpr-327126
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Surface Properties
/
Titanium
/
Zirconium
/
Chemistry
/
Lactic Acid
/
Corrosion
/
Dental Alloys
/
Hydrogen-Ion Concentration
/
Iron
/
Manganese
Limits:
Humans
Language:
Chinese
Journal:
Journal of Biomedical Engineering
Year:
2005
Type:
Article
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