Characterizations of three surface-modified titanium oxide films.
OBJECTIVE
To seek a new method of titanium passive treatment by combined anodic oxidation and thermal air treatment, which could increase the corrosion resistance and biocompatibility of pure titanium.


METHODS
Characteristics of Titanium sheets with natural oxide film (NOF), anodic oxide film (AOF), or heated anodic oxide film (HAOF) were compared and tested by x-ray diffractrometer, electrochemical corrosive method, and contact angle device.


RESULTS
HAOF had excellent corrosion resistance and greater crystallinity, indicating the crystal structure had changed. AOF had better hydrophily.


CONCLUSIONS
This in vitro study showed that thermal air treatment, after anodic oxidation, was a reliable method for creating a passive, protective film on the titanium surface, which could greatly enhance the corrosion-resistance and crystallinity.
Wang
G
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Department of Prosthodontics, College of Stomatology, Hubei Medical University, 65 Luoyu Road, Wuhan, Hubei, 430070, P. R. China.
Cheng
X R
XR
D000388:Air; D001672:Biocompatible Materials / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003343:Corrosion; D003460:Crystallization; D003461:Crystallography; D004563:Electrochemistry; D004566:Electrodes; D006358:Hot Temperature; D006801:Humans; D008422:Materials Testing; D010084:Oxidation-Reduction; D015203:Reproducibility of Results; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D017155:Wettability; D014961:X-Ray Diffraction
D001672:Biocompatible Materials; D020099:Coated Materials, Biocompatible; C009495:titanium dioxide; D014025:Titanium