Abstract
In this study, titanium dioxide nanotubes (TiO2–NTs) are prepared by using anodization method on commercial pure titanium (Ti) by applying constant voltage of 60 V to the electrolysis system for 15 min, one and two hours. Highly ordered and quality TiO2–NTs layers are formed on Ti electrode. To investigate the corrosion behavior of TiO2–NTs in 1 M KOH solution, electrochemical and surface analysis methods such as anodic and cathodic current-potential curves, electrochemical impedance spectroscopy (EIS), chronoamperometry (CA), scanning electron microscopy (SEM), atomic force microscopy (AFM) and energy dispersive X-ray spectroscopy (EDX) are used. Effect of long immersion time is also studied. Obtained results showed that the corrosion behavior of TiO2–NTs is more improved when compared to bare Ti electrode. Very stable, durable and excellent protective TiO2–NT layer is obtained at anodization time of 1 h. This oxide layer resisted the aggressive solution attack. It is suggested that this oxide layer is used in many industrial applications to reduce the corrosion of commercial pure Ti.
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