通过化学刻蚀和阳极氧化在AA2024铝合金表面制备超疏水表面.当化学刻蚀时间超过3 min时,表面在很宽pH值范围内显示出水静态接触角大于150°.SEM和AFM照片表明化学刻蚀时间决定了试样表面形貌和粗糙度.FTIR用来研究氟硅烷(G502)与AA2024表面的结合.结果说明FAS(氟硅烷)分子与铝合金表面的三氧化二铝发生反应,并在阳极氧化膜层表面展示出优异的结合性能.超疏水表面的耐腐蚀性能通过在质量分数为3.5％的NaC1溶液中进行动电位极化和交流阻抗(EIS)测试.电化学测试结果和等效电路模型显示出超疏水表面显著改善抗腐蚀性能.%A superhydrophobic surface was fabricated by chemical etching and anodization on AA2024 aluminum alloy.A static water contact angle of more than 150° was achieved at a wide pH value range when the surface chemical etching time was more than 3 min.The SEM and AFM images showed that the surface morphology and roughness were dependent on chemical etching time.The FTIR results indicated that the FAS (fluorinated agent silane) molecules reacted with alundum on the aluminum alloy surface and the surface exhibited excellent adhesion performance on the anodization specimen.The corrosion resistance of the superhydrophobic surfaces was estimated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements in 3.5wt％ NaCl aqueous solution.The electrochemical measurements and appropriate equivalent circuit models revealed that the anticorrosion performance was greatly improved by the superhydrophobic surface.
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