掩模电解制备TA15钛合金耐磨超疏水表面实验研究

Experimental study on wear-resistant superhydrophobic surface of TA15 titanium alloy prepared by mask electrolysis

为了提高TA15钛合金超疏水表面的耐磨性能,通过干膜掩模的方法在金属基体上附着一层预定图案的绝缘网,使未被绝缘层覆盖的金属表面发生电化学反应,进而形成一种拓扑框架结构包裹着的超疏水表面。当采用0.2 mol/L的NaBr溶液作为电解液时,使用正四边形掩模版对TA15钛合金进行电解加工,电加工参数为0.8 A/cm^(2)、12 min时其表面呈超疏水性。并且在被磨损超过1200 cm后仍能保持接触角150.1°、滚动角21.3°的疏水性。对电解加工后的TA15钛合金表面进行EDS图谱及SEM电镜图像分析得出,通过掩模电解方法可以有效地提高超疏水表面的耐磨性,同时掩模电解产生的框架结构不会破坏原表面的疏水性。实验结果表明:这种超疏水表面具有良好的自清洁性与抗黏附性。

To improve the wear resistance of TA15 superhydrophobic surfaces,an insulation mesh with predetermined pattern was attached to a base metal by a dry-firm photoresist to set off an electrochemical reaction on the metal surface without an insulation coating.In this method,a topology superhydrophobic surface was formed.In electrolyte of 0.2 mol/L NaBr solution,TA15 was electrochemically machined by using a square mask with an electrical machining parameter of 0.8 A/cm^(2) for 12 min when its surface was superhydrophobic.The worn surface upwards of 1200 cm maintained superhydrophobic at contact angle of 150.1°and rolling angle of 21.3°.The Energy Dispersive Spectroscopy(EDS)maps and Scanning Electron Microscope(SEM)images of electrochemically machined TA15 titanium alloy surface showed that the use of a dry-film photoresist mask could effectively improve the wear resistance of the superhydrophobic surface,while the structure generated from mask electrolysis did not damage the hydrophobicity of the original surface.This study shows that the superhydrophobic surface has superior self-cleaning and anti-adhesion properties.