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目前,关于含氟自润滑钝化液在锌基表面的成膜过程及膜层结构研究较少,采用含氟自润滑钝化液对热镀锌钢板进行钝化。采用电化学测试、扫描电镜(SEM)、原子力显微镜(AFM)以及端面摩擦磨损试验对钝化膜的耐电化学腐蚀性能、微观形貌、粗糙度以及自润滑性进行研究,并分析了其钝化成膜机理。结果表明:经自润滑钝化处理后的热镀锌钢板对腐蚀介质的阻碍能力较强,已经达到或超过铬酸盐钝化水平,其表面通常存在一层网状结构的有机薄膜,作为粘结剂对硅溶胶及含氟润滑剂起吸附作用,呈弥散状态分布的固体润滑剂在冲压以及摩擦过程中能有效降低摩擦系数。
At present, there are few researches on the film formation process and film structure of fluorine-containing self-lubricating passivation solution on the zinc-based surface. The passivation of hot-dip galvanized steel is carried out by using fluorine self-lubricating passivation solution. The electrochemical corrosion resistance, microstructure, roughness and self-lubricity of passivation film were studied by electrochemical test, scanning electron microscopy (SEM), atomic force microscope (AFM) and end friction and wear test. Film forming mechanism. The results show that the self-lubricating passivated hot-dip galvanized steel has stronger resistance to corrosive media and has reached or exceeded the chromating passivation level. The surface of the hot-dip galvanized steel often has a network of organic thin films. The binder adsorbs the silica sol and the fluorine-containing lubricant, and the solid lubricant in a dispersed state can effectively reduce the friction coefficient during the stamping and the rubbing process.