采用简单易行的化学刻蚀方法，通过硝酸刻蚀、化学镀银和硬脂酸自组装改性处理，在 AZ91D 镁合金表面上成功制备出了超疏水膜层，进一步解释了该制备工艺的化学反应机理。利用扫描电子显微镜和视频光学接触角测量仪对 AZ91D 镁合金表面超疏水膜层的微观形貌和润湿性能进行了表征，利用能谱仪和光谱仪测定了膜层的表面化学组成。结果显示，釆用上述方法处理后的 AZ91D 镁合金表面呈现出良好的疏水性，水滴在试样表面的表观接触角为153°，滚动角为4°。
The research adopts a chemical etching method which is simple and feasible,by nitric acid etching, chemical silvering and stearic acid self-assembled modified treatment,a superhydrophobic coating has been suc-cessfully prepared on AZ91D magnesium alloys surface. Furthermore,the chemical reaction mechanism has been revealed in the preparation process.Morphology and wettability of the superhydrophobic coating are characterized by an optical contact angle device (CA)and scanning electron spectroscopy (SEM),the surface chemical composition is determined by using energy disper-sive spectrometer (EDS)and Fourier transform infrared spectroscopy (FT-IR).The relevant results show that the treated AZ91D magnesium alloy surface exhibits high hydrophobicity,the apparent contact angle of water droplets was 153°,roll angle was 4°on the specimen surface.
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