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.

中文翻译：

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钛白粉纳米管在碱性溶液中的腐蚀行为

摘要

在这项研究中，通过在工业纯钛（Ti）上采用阳极氧化方法，通过向电解系统施加60 V恒定电压15分钟，一小时和两个小时，来制备二氧化钛纳米管（TiO ₂ -NTs）。Ti电极上形成了高度有序的优质TiO ₂ -NTs层。为了研究TiO ₂ –NTs在1 M KOH溶液中的腐蚀行为，电化学和表面分析方法，例如阳极和阴极电流-电位曲线，电化学阻抗谱（EIS），计时电流法（CA），扫描电子显微镜（SEM），使用原子力显微镜（AFM）和能量色散X射线光谱（EDX）。还研究了长时间浸泡的影响。所得结果表明TiO的腐蚀行为与裸钛电极相比，_2- NTs的性能得到了更大的改善。在1h的阳极氧化时间下获得了非常稳定，耐用和优异的TiO ₂ -NT保护层。该氧化物层抵抗了侵蚀性溶液侵蚀。建议将该氧化物层用于许多工业应用中以减少商业纯钛的腐蚀。