Objective: To investigate the physicochemical properties that titanium morphology was created with micro arc oxidation at different DC voltage.
Methods: The titanium was cut into 10×10×1mm3 and they were grind and polished respectively. DC voltage that treated titanium was used single variable control: 200V, 250V, 300V, 350V, 400V, 450V; treatment time: 5S; the treatment temperature was less than 400C, Electric current and other conditions were same.
Results: 1. The contact angle of the Ti group is the largest, which is (80.80±0.57), and the MAO350V group is the smallest which is (35.00±0.79) degrees. 2. The critical load of morphology varied from 16N to 35N. When the voltage was 350V, the bonding strength of morphology is relatively good, and the critical load is (32.38±1.941) N. There is statistical significance among all groups. 3. The wear resistance of the ceramic film of the group MAO350V manifested the smallest friction coefficient, the value was approximately 0.4. 4. Its Self-corrosion voltage (-0.309V) in MAO350V was way higher than the group Ti (-0.378V), and self-corrosion current [2.5×10-5 (A·cm-2)] in the MAO350V was much lower than the group Ti [5.2×10-5 (A·cm-2)].
Conclusion: There is high quality of morphology created at 250-350V DC voltage.
Titanium; Micro-arc oxidation; Surface modification; DC voltage