치과용 Ti-6Al-4V 합금 골 고정판 표면에 형성된 나노튜브의 부식거동
Corrosion Behavior of Nanotube Formed on the Bone Plate of Ti-6Al-4V Alloy for Dental Use
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Titanium and titanium alloys are widely used for orthopedic and dental implants for their superior mechanical properties, low modulus, excellent corrosion resistance and good biocompatibility. In this study, corrosion behaviors of nanotube formed on the bone plate of Ti-6Al-4V alloy for dental use have been investigated. TiO2 nanotubes were formed on the dental bone plates by anodization in H3PO4 containing 0.6 wt % NaF solution at 25 ℃. Electrochemical experiments were performed using a conventional three-electrode configuration with a platinum counter electrode and a saturated calomel reference electrode. Anodization was carried out using a scanning potentiostat(EG&G Co, Model 263A USA), and all experiments were conducted at room temperature. The surface morphology were observed using field emission scanning electron microscopy(FE-SEM) and energy dispersive x-ray spectroscopy(EDS). The corrosion behavior of the dental bone plates was examined using potentiodynamic test(potential range of -1500 ~ 2000 mV) in a 0.9 % NaCl solution by potentiostat(EG&G Co, PARSTAT 2273. USA). The inner diameter of nanotube was about 150 ～ 180 nm with wall thickness of about 20 nm. Tie interspace of nanotube to nanotube was 50 nm. The passive region of the nanotube formed bone plates showed the broad range compared to non-nanotube formed bone plates. The corrosion surface of samples were covered with corrosion products.
Abstract
Titanium and titanium alloys are widely used for orthopedic and dental implants for their superior mechanical properties, low modulus, excellent corrosion resistance and good biocompatibility. In this study, corrosion behaviors of nanotube formed on the bone plate of Ti-6Al-4V alloy for dental use have been investigated. TiO2 nanotubes were formed on the dental bone plates by anodization in H3PO4 containing 0.6 wt % NaF solution at 25 ℃. Electrochemical experiments were performed using a conventional three-electrode configuration with a platinum counter electrode and a saturated calomel reference electrode. Anodization was carried out using a scanning potentiostat(EG&G Co, Model 263A USA), and all experiments were conducted at room temperature. The surface morphology were observed using field emission scanning electron microscopy(FE-SEM) and energy dispersive x-ray spectroscopy(EDS). The corrosion behavior of the dental bone plates was examined using potentiodynamic test(potential range of -1500 ~ 2000 mV) in a 0.9 % NaCl solution by potentiostat(EG&G Co, PARSTAT 2273. USA). The inner diameter of nanotube was about 150 ～ 180 nm with wall thickness of about 20 nm. Tie interspace of nanotube to nanotube was 50 nm. The passive region of the nanotube formed bone plates showed the broad range compared to non-nanotube formed bone plates. The corrosion surface of samples were covered with corrosion products.
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