阳极氧化法制备二氧化钛氧化膜耐海水腐蚀性能研究

发布时间：2018-05-23 23:41

本文选题：阳极氧化法 + 二氧化钛氧化膜　；参考：《中国海洋大学》2010年硕士论文

【摘要】： 伴随着生产力的发展和科学技术的进步,海洋与人类的关系已经越来越密切,与此同时,大量的金属材料被应用在海洋科技研究与工程开发项目中。然而由于海水的高盐度及海洋气候本身特征导致了金属材料在海洋中的腐蚀相当严重。如何制备出新型的海洋材料来有效的防止金属在海水中的腐蚀成为当前各国科研机构研究的重要课题。本文在采用阳极氧化法制备出二氧化钛氧化膜的基础上,通过对其本身性质检测及其与高分子材料结合制备复合材料,旨在研究耐腐蚀薄膜的耐海水腐蚀性能,减缓材料表面腐蚀的发生,探索和研究出一种能够应用于海洋环境的耐腐蚀材料。首先,我们使用硫酸作为电解液,以恒压阳极氧化方式在钛基体上制备二氧化钛氧化膜,利用XRD表征了不同条件下制备的氧化物膜的结构,利用接触角测量仪和扫描电镜等测试方法研究了二氧化钛氧化膜的亲疏水性及其表面结构；使用电化学阻抗、极化曲线进行耐腐蚀性能分析。实验结果表明,阳极氧化制备出的二氧化钛氧化膜具有较好的耐海水腐蚀性能,而二氧化钛黑暗条件下特有疏水性能进一步增加了氧化膜的耐腐蚀性。其次,我们使用恒电位法在制备好的二氧化钛氧化膜上聚合一层聚苯胺膜。使用SEM、接触角测定仪检测聚苯胺的表面形貌和疏水性能；使用电化学阻抗,极化曲线等电化学测试方法对其进行耐腐蚀性能测试。实验结果表明,在弱碱性海水中,聚苯胺还原单元去掺杂,生成全氧化态聚苯胺,全氧化态聚苯胺拥有优异的耐海水渗透和耐腐蚀性能,因此有效的增加对内部金属的保护,这对降低金属的腐蚀速率有显著的作用。第三,我们采用聚苯乙烯球作为表面修饰材料,在已经生成好的二氧化钛纳米管氧化膜上制备出聚苯乙烯球/二氧化钛纳米管复合膜,使用接触角测定仪和电化学阻抗,极化曲线测试方法来分别测试其疏水性和耐海水腐蚀性能。实验结果表明,疏水材料修饰的氧化膜表面能够有效的阻止海水向氧化膜内部的渗透,从而降低海水对氧化膜的腐蚀性能。
[Abstract]:With the development of productivity and the progress of science and technology, the relationship between ocean and human has become more and more close. At the same time, a large number of metal materials have been applied in marine science and technology research and engineering development projects. However, due to the high salinity of seawater and the characteristics of marine climate itself, the corrosion of metal materials in the ocean is very serious. How to prepare new marine materials to effectively prevent metal corrosion in seawater has become an important research topic in various countries. On the basis of anodic oxidation method, the properties of TIO _ 2 film and its composite materials were investigated in this paper. The purpose of this study was to study the corrosion resistance of corrosion resistant film to seawater. In order to slow down the occurrence of surface corrosion, a kind of corrosion resistant material which can be used in marine environment is explored and studied. First of all, we used sulfuric acid as electrolyte to prepare TiO2 film on titanium substrate by constant voltage anodic oxidation. The structure of oxide film was characterized by XRD under different conditions. The hydrophobicity and surface structure of TIO _ 2 film were studied by means of contact angle measuring instrument and scanning electron microscope, and the corrosion resistance was analyzed by electrochemical impedance and polarization curve. The experimental results show that the TIO _ 2 film prepared by anodic oxidation has good corrosion resistance to seawater, and the unique hydrophobicity of TIO _ 2 can further increase the corrosion resistance of the film under dark conditions. Secondly, we polymerize a Polyaniline film on the prepared TIO _ 2 film by potentiostatic method. The surface morphology and hydrophobicity of Polyaniline were measured by means of SEM and contact angle tester, and the corrosion resistance of Polyaniline was tested by electrochemical impedance and polarization curves. The experimental results show that Polyaniline reduction unit is dedoped to form fully oxidized Polyaniline in weakly alkaline seawater, and the fully oxidized Polyaniline has excellent resistance to seawater penetration and corrosion resistance, so it can effectively increase the protection of internal metals. This has a significant effect on reducing the corrosion rate of metals. Thirdly, using polystyrene ball as surface modification material, we prepared polystyrene ball / titanium dioxide nanotube composite film on the formed TIO _ 2 nanotube oxide film, using contact angle tester and electrochemical impedance. Its hydrophobicity and corrosion resistance to seawater were tested by polarization curve test method. The experimental results show that the surface of the oxide film modified by hydrophobic material can effectively prevent the seawater from penetrating into the inner surface of the oxide film and thus reduce the corrosion resistance of the sea water to the oxide film.
【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：TG174.4

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