超疏水膜层防腐蚀机理及气相法制备技术研究进展

Current Status of Research on Anticorrosion Mechanism and Vapor Phase Preparation Technique of Uperhydrophobic Film on Metallic Materials

综述了超疏水膜层的防腐蚀机理,分析了超疏水膜层表面微-纳二元粗糙结构、表面能与其疏水性的关系,重点介绍了超疏水膜层表面的气垫效应和毛细效应,并阐述了超疏水膜层对金属的防腐蚀机理和腐蚀破坏机理的研究现状。同时鉴于气相法制备技术具备操作简单、成本低、环境友好、适用范围广、制备膜层可重复性好、膜层均匀等优点,综述了3种常用气相法制备超疏水膜层技术—常温常压化学气相沉积技术(常温常压CVD)、等离子化学气相沉积技术(PECVD)和气溶胶辅助化学气相沉积技术(AACVD)的研究进度和各自的优缺点,以及存在的问题。展望了气相法制备技术在超疏水防腐蚀膜层制备中的研究方向。

More and more researchers have focused on superhydrophobic film in the recent two decades for its advantages such as self-cleaning, non-wetting, antifouling and anti-biological fouling, which could effectively protect metal from corrosion. Anticorrosion mechanism of superhydrophobic films was reviewed, in terms of the relation between micro/nano dual coarse-structure and surface energy, the hydrophobicity, air cushion effect and capillary effect of the superhydrophobic film. The research status on the relevant anticorrosion-and corrosion failure-mechanism was also expounded. Since the vapor phase preparation presents advantages such as the superiority of simple operation, low cost, environment friendly, wide applicable scope, good reproducibility and film homogeneity, the current status of the vapor phase preperation methods of superhydrophobic film for corrosion and protection was reviewed, such as CVD by ambient-pressure and-temperature, PECVD and AACVD with their advantages and drawbacks.In view of the existing insufficient, corresponding research direction were put forward.