硬脂酸改性镁合金铈钒转化膜的制备与性能

发布时间：2018-01-16 12:11

本文关键词：硬脂酸改性镁合金铈钒转化膜的制备与性能　出处：《材料工程》2017年05期 　论文类型：期刊论文

【摘要】：采用硬脂酸对镁合金铈钒转化膜进行改性处理。利用扫描电镜、接触角测试仪、X射线能谱仪和红外光谱仪对改性膜层的微观结构、表面润湿性能以及化学组成进行分析,并通过防黏附和电化学实验研究膜层的自清洁行为以及耐腐蚀性能。结果表明:硬脂酸对铈钒转化膜的改性处理,不仅对转化膜的裂纹起到修补作用,并且通过接枝硬脂酸的疏水长链使改性膜层表面转化为超疏水性。8h常温浸泡后得到的改性膜层,表面接触角达154.6°,并表现出良好的自清洁性;耐腐蚀能力与原铈钒转化膜相比,膜层电阻R_(coat)提高25倍,自腐蚀电流密度i_(corr)降低2个数量级,其耐蚀性能得到显著提升。
[Abstract]:The cerium vanadium conversion film of magnesium alloy was modified by stearic acid. The microstructure of the modified film was studied by scanning electron microscope (SEM), contact angle tester (SEM), X-ray energy spectrometer (XRD) and infrared spectrometer (IR). The surface wettability and chemical composition were analyzed, and the self-cleaning behavior and corrosion resistance of the film were studied by anti-adhesion and electrochemical experiments. The results showed that the ceria-vanadium conversion film was modified by stearic acid. It can not only repair the cracks of the conversion film, but also change the surface of the modified film into superhydrophobic film after soaking at room temperature for 8 hours by grafting stearic acid with hydrophobic acid. The surface contact angle was 154.6 掳and showed good self-cleaning. Compared with the original cerium-vanadium conversion film, the corrosion resistance of the film is increased by 25 times, and the corrosion resistance of the coating is reduced by 2 orders of magnitude, and the corrosion resistance of the coating is improved significantly.
【作者单位】：西安建筑科技大学环境与市政工程学院;西华师范大学环境科学与工程学院;西安建筑科技大学冶金工程学院;
【基金】：国家自然科学基金项目(20976143)
【分类号】：TG174.4
【正文快照】： 2西华师范大学环境科学与工程学院,四川南充637009;3西安建筑科技大学冶金工程学院,西安710055)JIANG Xiao1,2,GUO Rui-guang1,TANG Chang-bin3(1School of Environmental and Municipal Engineering,Xi’anUniversity of Architecture and Technology,Xi’an 710055,China;2S

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