【摘要】 Zn-5%Al镀层表面沉积铈钝化膜，对沉积不同时间的钝化膜进行硬脂酸改性形成超疏水膜层。采用扫描电子显微镜（SEM）观察铈膜层的微观结构，激光共聚焦显微镜（LCM）观察膜层表面的粗糙度，能谱仪（EDS）和X射线光电子能谱仪（XPS）分析膜层的化学元素，使用接触角测量仪测试膜层的静态接触角，通过电化学工作站测试膜层的交流阻抗谱来比较膜层的耐蚀性。结果表明，随着沉积时间的增加，Zn-5%Al镀层表面钝化膜的Ce含量不断升高，厚度增加，变得越来越亲水。硬脂酸改性后膜层表面形成微纳尺度的微观粗糙结构，疏水性随钝化时间增加而增大，沉积30 min形成的改性膜层水接触角达到164°。超疏水膜层表面主要由硬脂酸、CeO₂/Ce（OH）₄和Ce₂O₃/Ce（OH）₃组成，在腐蚀介质中形成空气层阻碍液体穿过，沉积时间从5 min延长至30 min，耐腐蚀性能不断提高。更多还原

【Abstract】 Cerium-based passivation films were deposited on Zn-5%Al coating,followed by stearic acid modification of the films deposited for varying durations to form a superhydrophobic coating. The microstructure of the cerium-based coating was examined using scanning electron microscopy（ SEM）,and surface roughness was assessed via laser confocal microscopy（ LCM）. The chemical composition of the coating was analyzed by energy dispersive spectroscopy（ EDS） and X-ray photoelectron spectroscopy（ XPS）. Static contact angles were measured using a contact angle goniometer,and corrosion resistance was evaluated through electrochemical impedance spectroscopy（ EIS） measurements performed on an electrochemical workstation.The results reveal that with the increasing of deposition time,the Ce content and film thickness on the Zn-5% Al coating increases continuously,accompanied by an increase in film thickness and a progressive enhancement of hydrophilicity. The stearic acid-modified film surface developed a micro-nanoscale rough structure,and the hydrophobicity increased progressively with prolonged passivation time. The modified film formed after 30 minutes of deposition achieved a water contact angle of164°． The superhydrophobic surface is mainly composed of stearic acid,Ce O₂/Ce（ OH）₄,Ce₂O₃/Ce（ OH）₃,forming an air barrier that impedes liquid penetration into corrosive media. As the deposition time increases from 5 to 30 minutes,the corrosion resistance shows a progressive enhancement.更多还原