利用皮秒激光器在镍铝青铜合金表面制备了具有不同微观形貌的微纳米复合结构,再通过硬脂酸进行表面修饰。采用扫描电镜和X射线衍射仪等表征了所得表面的形貌和化学成分。研究结果表明,经皮秒激光加工和硬脂酸修饰后,表面的接触角都达到150°以上。不同的脉冲能量密度下,试样表面的微观形貌和润湿性不同。随着脉冲能量密度的增大,修饰后的试样表面的滚动角逐渐减小,当脉冲能量密度为6.85 J/cm ²时,滚动角减小到7°,随着脉冲能量密度的进一步增加,滚动角又逐渐增大。耐蚀性测试结果表明:超疏水镍铝青铜合金表面具有更好的耐腐蚀性能。采用优化的工艺参数可以在镍铝青铜合金上加工出超疏水表面,有助于提高其耐腐蚀性能。

The micro-nano composite structures with different micromorphologies are prepared on the nickel-aluminum bronze alloy surfaces by a picosecond laser, and then surface-modofied by stearic acid. Scanning electron microscopy and X-ray diffraction and others have been performed to characterize the morphologies and chemical composition. The research results show that the contact angle of the surfaces obtained by picosecond laser processing and surface modification of stearic acid is more than 150°. The samples have different surface morphologies and wettability under different laser fluences. With the increase of laser fluence, the sliding angle of the modified sample surface gradually decreases. When laser fluence is 6.85 J/cm 2, the sliding angle decreases to 7°. With the further increase of laser fluence, the sliding angle gradually increases again. The corrosion resistance test results show that the surface of superhydrophobic nickel-aluminium bronze alloy has better corrosion resistance. The superhydrophobic surface of nickel-aluminium bronze alloy can be machined with optimized process parameters, which is helpful to improve the corrosion resistance of nickel-aluminium bronze alloy.