Corrosion inhibitor storage and release property of TiO2 nanotube powder synthesized by rapid breakdown anodization method

Titanium dioxide (TiO2) is one of the most studied substances in material science due to its versatile properties and diverse applications. In this study titanium dioxide nanotube powder were synthesized by rapid breakdown anodization (RBA) method. The synthesis involved potentiostatic anodization of titanium foil in 0.1 M HClO4 electrolyte under an applied voltage of 20 V and rapid stirring. The morphology and the phase of titanium dioxide nanotube powder were studied using field emission scanning electron microscopy, laser Raman spectroscopy and high resolution transmission electron microscopy. Benzotriazole was chosen as model inhibitor to evaluate TiO2 nanotube powder's corrosion inhibitor loading and releasing properties. The storage and release properties of TiO2 nanotube powder were studied using UV–visible spectroscopy and thermogravimetric analysis.

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► TiO2 nanotube powders were synthesized by rapid breakdown anodization method.
► Benzotriazole was loaded into the TiO2 nanotube powders.
► Low pH induced release of benzotriazole from TiO2 nanotube powders was proved.