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采用激光加工结合构筑纳米结构,并涂覆低表面能物质的方法制备了镁合金超疏水表面。使用光学显微镜和扫描电镜观察表面形貌,接触角测量仪测量超疏水表面的静态接触角,电化学分析方法测试试样在模拟生物体液中的腐蚀性能。结果表明:激光加工参数对超疏水表面形貌和性能具有重要的影响。当加工电流为13 A,点阵间距为50μm时,表面微/纳米结构均匀,静态接触角达到最大值161.7°。超疏水试样的腐蚀电位增加,极化电阻增大,腐蚀电流降低,腐蚀速率降低31%,有效提高了WE43镁合金的耐生物体液腐蚀性能。
Magnesium alloy superhydrophobic surfaces were prepared by laser machining combined with nanostructures and coating with low surface energy materials. The surface morphology was observed by optical microscope and scanning electron microscope. The static contact angle of superhydrophobic surface was measured by the contact angle measuring instrument. The electrochemical analysis method was used to test the corrosion behavior of the sample in simulated biological fluid. The results show that laser processing parameters have an important influence on the morphology and properties of superhydrophobic surfaces. When the processing current is 13 A and the lattice spacing is 50 μm, the surface micro / nano structure is uniform and the static contact angle reaches the maximum of 161.7 °. The corrosion potential of the superhydrophobic sample increases, the polarization resistance increases, the corrosion current decreases, and the corrosion rate decreases by 31%, effectively improving the corrosion resistance of WE43 magnesium alloy to biological fluids.