钢铁表面纯锆盐转化膜技术研究现状与进展

发布时间：2018-05-14 10:48

  本文选题：锆盐 + 化学转化　； 参考：《表面技术》2017年08期

【摘要】：锆盐转化膜技术是一种十分重要的环境友好型钢铁表面处理技术,有望完全取代磷酸盐和铬酸盐转化技术。锆盐转化膜的耐蚀性与磷酸盐和铬酸盐转化膜接近,对有机涂层和钢铁基体有着优异的附着力。从纯锆盐转化基本原理、锆盐体系选择、制备方法、转化工艺参数控制、膜层形貌与结构、膜层耐蚀行为、膜层与后续涂层的附着力等方面,对国内外钢铁表面纯锆盐转化膜技术的研究进展和成果进行了综述。纯锆盐转化技术采用的转化液以氟锆酸及其盐为主,制备方法主要是浸渍法。为了获得质量稳定的纯锆盐转化膜,需要控制工艺参数:Zr~(4+)体积分数3%~5%,pH值3.5~4.5,转化时间90 s左右,温度20~35℃。锆盐转化膜一般为100~350 nm厚的双层结构,由纳米颗粒、小结节和聚集体构成,这种结构发挥的锚固作用会显著增加基体与后续涂层的结合强度。但是,锆盐转化成膜机理不够成熟,工艺欠稳定,在实际工业生产应用中仍面临挑战。所以,成膜机制和工艺稳定性的深入探究是未来锆盐转化膜的重点研究方向。
[Abstract]:Zirconium salt conversion membrane technology is a very important environmental friendly surface treatment technology for iron and steel, which is expected to completely replace phosphate and chromate conversion technology. The corrosion resistance of zirconium salt conversion film is close to that of phosphate and chromate conversion film, and it has excellent adhesion to organic coating and steel substrate. The basic principles of pure zirconium salt conversion, the selection of zirconium salt system, the preparation method, the control of conversion process parameters, the morphology and structure of the film, the corrosion resistance of the film, the adhesion between the film and the subsequent coating, etc. The research progress and achievements of pure zirconium salt conversion membrane on iron and steel surface at home and abroad are reviewed. The conversion solution of pure zirconium salt is mainly fluorozirconic acid and its salt. In order to obtain the pure zirconium salt conversion film with stable quality, it is necessary to control the technological parameter: 1: ZrO4). The volume fraction of 3% Zirconium is 3%, the pH value is 3. 5%, the conversion time is about 90 s, and the temperature is 2035 鈩，

本文编号：1887562