[Study on the pitting corrosion-resistant of Ti-75 alloys with different from oxidize temperatures in vacuum in oral cavity].
OBJECTIVE
To study the property of pitting corrosion-resistant of Ti-75 alloys with different from oxidize temperatures in vacuum in oral.


METHODS
Ti-75 alloys were prepared 30 mm x 10 mm x 1 mm specimens and annealed at 200 degrees C, 300 degrees C, 400 degrees C, 500 degrees C oxidize temperatures in vacuum. The open-circuit potential (Ecoor) and the breakdown potential (Eb) were measured, and the cyclic anodic polarization curves was drawn.


RESULTS
The Ecoor of Ti-75 alloys annealed at 200 degrees C oxidize temperatures in vacuum is -49.0 mV. At 300 degrees C, 400 degrees C, 500 degrees C oxidize temperatures in vacuum, the different Ecoor is -75.3 mV, -51.3 mV and -60 mV respectively. The Eb of Ti-75 alloys annealed at 200 degrees C oxidize temperature for 5 minutes in vacuum is the highest (+180 mV).


CONCLUSIONS
It is better for Ti-75 alloys being annealed at 200 degrees C for 5 minutes in vacuum to release the stress of machine duplication and to resistant pitting corrosion.
Song
Y
Y
Department of Prosthodontics, College of Stomatology, Fourth Military Medical University, Xi'an 710032, China.
Xu
J
J
Ma
X
X
D000497:Alloys / Q000737:chemistry*; D003343:Corrosion; D015921:Dental Implants; D010084:Oxidation-Reduction; D013696:Temperature; D014025:Titanium / Q000737:chemistry*
D000497:Alloys; D015921:Dental Implants; D014025:Titanium