Abstract This work presents a facile and efficient electropolishing of metallic titanium (Ti) in the relatively eco-friendly electrolyte of deep eutectic solvent (DES) using a mixture of choline chloride-propylene glycol (1 mol ChCl: 2 mol PG). The electropolishing process of metallic titanium was performed under potentiostatic condition (10 V for 40 minutes) at room temperature. Surface topography and morphology were investigated using scanning electron microscope (SEM) and atomic force microscopy (AFM). The promising electropolishing provides a shiny and mirror-like surface with an average surface roughness (Ra) of 37.92 nm from the parent metallic Ti with a roughness of 455.60 nm. The surface passivation after electropolishing is of the most likely acceptable mechanism for removing microscope roughness. The proposed electropolishing in the present DES electrolyte is a promising strategy for making mirror-like surface (surface resistive against corrosion) of biomedical metallic titanium.

中文翻译：

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在深共晶溶剂中电解抛光纯金属钛

摘要 这项工作提出了一种使用氯化胆碱-丙二醇（1 mol ChCl：2 mol PG）的混合物在相对环保的深共晶溶剂（DES）电解液中对金属钛（Ti）进行简便有效的电解抛光。金属钛的电解抛光过程在室温下在恒电位条件下（10 V 40 分钟）进行。使用扫描电子显微镜 (SEM) 和原子力显微镜 (AFM) 研究表面形貌和形态。有前途的电解抛光提供了一个闪亮的镜面表面，平均表面粗糙度 (Ra) 为 37.92 nm，来自母体金属 Ti，粗糙度为 455.60 nm。电解抛光后的表面钝化是去除显微镜粗糙度最可能接受的机制。