电刷镀-激光加工法制备耦合结构及复合特性研究

通过电刷镀-激光加工法在铝合金表面制备出特殊的复合结构,获得具有低黏附、耐腐蚀特性的超疏水表面,其对水的静态接触角达到155.1°,滚动角小于5.6°。利用扫描电子显微镜(SEM)、光学显微镜、接触角测量仪(OCA15Pro)和X射线衍射仪(XRD)表征表面的形貌结构、润湿特性和物相组成,并通过腐蚀性实验对表面的耐腐蚀性能进行研究。结果表明:制备表面是一种带有孔洞的沟槽与菜花状的凸包簇形成的复合结构,并且各凹槽与凸包结构均为定尺寸分布。电刷镀处理使表面物相组成相对于基体表面发生明显变化,进一步的激光加工使峰值强度增强,材料组织发生细化现象;耦合方法所制备表面的耐腐蚀性也得到改善。

Fabrication of Coupling Structure and Composite Properties by Electro-brush Plating and Laser Processing

To obtain a superhydrophobic aluminum alloy surface ,a kind of special coupling structure was fabricated on the aluminum alloy surface by a couple ways which was electro‐brush plating com‐bined with laser processing .The surface has excellent anti‐adhesion and corrosion resistance property . The contact angle can reach as high as 155 .1° ,while the sliding angle less than 5 .6° .The morphologi‐cal feature ,chemical structures ,and wettability of resultant surfaces were characterized by scanning electronic microscope (SEM ) ,X‐ray diffraction (XRD) and water contact angle measurements .The surface corrosion resistance was researched by a corrosion resistance experiment .The results show that surface consists of micro‐scale grooves and like‐cauliflower mastoids ,the grooves in a regular ar‐rangement with mastoid structures for a coupling structure on the surface .The special coupling struc‐ture makes the surface already have superhydrophobicity .The wettability of the surface changes from hydrophilicity to superhydrophobicity . T here have no peaks from other phases can be detected be‐tween electro‐brush plating surface and aluminum alloy substrates .The peak intensity is changed by laser processing ,and the organization structure of the material is further refined .The corrosion re‐sistance of the surface that is fabricated by couple ways improves .