Q235钢基和铝基超疏水防腐蚀表面制备及其性能研究

发布时间：2018-03-28 07:48

本文选题：刻蚀　切入点：阳极氧化　出处：《烟台大学》2017年硕士论文

【摘要】：在金属材料基体表面上制备超疏水且防腐蚀的表面是一种绿色、环保的防腐蚀技术,超疏水表面具有超疏水、自清洁、低粘附、防覆冰、防生物粘附等优良性能,在很多领域都有广泛的应用,超疏水表面的防腐蚀对金属材料保护技术的发展有着重要的促进意义。超疏水表面的制备通常是通过在材料的表面构筑微纳米二级结构,同时用低表面能物质处理这样的结构,从而使得材料表面具有超疏水的性能。而在这两个因素中最为关键且更具研究意义的是材料表面的微纳米结构的构筑。为提高Q235钢基体的防腐蚀性能,本文从众多的方法中选择了三种不同的方法,成功地在Q235钢基体上制备出超疏水表面,并详细地探究了每种方法制备的超疏水表面的超疏水、防腐蚀等性能。本文研究的具体内容如下所示:(1)结合化学刻蚀法和低表面能物质修饰的方法在Q235钢基体材料上制备了超疏水防腐蚀表面,探究刻蚀液中各个组分含量、低表面能物质涂覆等对超疏水防腐蚀表面性能的影响。使用含有硝酸浓度为20%的刻蚀液处理后的Q235钢材料表面,再涂覆低表面能物质PDMS后,疏水效果达到最好,其与水的接触角是163°。(2)结合物理气相沉积法与低表面能物质修饰的方法在Q235钢基体上制备了超疏水防腐蚀表面,探究物理气相沉积涂层的时间、低表面能物质涂覆等对超疏水防腐蚀表面性能的影响。在相同的其他条件下,物理气相沉积时间对Q235钢材料表面粗糙度起主要作用,随着物理气相沉积电流时间的增加,粗糙度呈现先增大后稳定的趋势。通过电化学测试的数据和其他相关数据可以看到,多弧离子镀技术的涂层的厚度的增加会增加Q235钢表面的防腐蚀性能。(3)结合阳极氧化法和低表面能物质修饰的方法在铝2024基体材料上制备超疏水兼具备防腐蚀的材料表面,探究阳极氧化选择的电解液组分以及阳极氧化的时间、低表面能物质涂覆等对超疏水防腐蚀表面性能的影响。在相同的阳极氧化时间下,对铝2024材料表面粗糙度起主要作用的是阳极氧化过程中电流密度,随阳极氧化过程中电流密度的增加,粗糙度呈现出先增大后逐渐达到稳定的发展趋势。在相同的阳极氧化电流密度下,对铝2024材料表面粗糙度起主要作用的是阳极氧化时间,随着阳极氧化电流时间的增加,粗糙度呈现出先增大后逐渐达到稳定状态的发展趋势。通过扫描电镜(SEM)观察样品表面形貌、激光共聚焦显微镜(CLSM)观察样品三维形貌、利用接触角测量仪测试了样品与水的接触角、运用XRD表征其组成、使用EDS表征元素含量及分布进行了表征,使用Modulab电化学工作站测试处理后超疏水表面防腐性能。从而系统地研究了不同工艺对制备的金属材料基体的超疏水表面及其防腐蚀性能的影响。
[Abstract]:The super-hydrophobic and anticorrosive surface prepared on the metal substrate is a green and environmentally friendly anticorrosion technology. The super-hydrophobic surface has excellent properties such as super hydrophobic, self-cleaning, low adhesion, anti-icing, anti-biological adhesion, etc. The anticorrosion of superhydrophobic surface is of great significance to the development of metal material protection technology. The preparation of superhydrophobic surface is usually through the construction of micro-nano secondary structure on the surface of material. At the same time, treating such structures with low surface energy substances, In order to improve the corrosion resistance of Q235 steel substrate, the material surface has superhydrophobic properties. In this paper, the superhydrophobic surface was successfully prepared on Q235 steel substrate by three different methods, and the superhydrophobic surface of the superhydrophobic surface prepared by each method was investigated in detail. The specific contents of this paper are as follows: (1) superhydrophobic corrosion resistant surface was prepared on Q235 steel substrate by chemical etching method and low surface energy material modification method, and the content of various components in the etching solution was investigated. The effect of low surface energy material coating on the surface properties of super hydrophobic corrosion resistant surface. The hydrophobic effect of Q235 steel treated by etching solution containing 20% nitric acid concentration and coated with low surface energy material PDMS is the best. The contact angle with water is 163 掳. 2) superhydrophobic anticorrosive surface was prepared on Q235 steel substrate by physical vapor deposition method and low surface energy material modification method. The time of physical vapor deposition coating was investigated. Under the same conditions, the physical vapor deposition time plays a major role in the surface roughness of Q235 steel, and with the increase of physical vapor deposition current time, the surface roughness of Q235 steel is increased with the increase of physical vapor deposition current time. Roughness shows a tendency to increase first and then stabilize. As can be seen from electrochemical data and other relevant data, The increase of the coating thickness of multi-arc ion plating technology will increase the corrosion resistance of Q235 steel surface. It can be combined with anodic oxidation method and low surface energy material modification method to prepare superhydrophobic and anticorrosive material surface on aluminum 2024 substrate. The effects of anodic oxidation selected electrolyte composition, anodizing time, coating of low surface energy substance on the surface properties of super hydrophobic corrosion resistant surface were investigated under the same anodic oxidation time. The main effect on surface roughness of aluminum 2024 is the current density in anodic oxidation process, which increases with the increase of the current density in anodic oxidation process. Under the same anodizing current density, the main effect on the surface roughness of aluminum 2024 is the anodic oxidation time, with the increase of anodizing current time. The surface morphology of the samples was observed by scanning electron microscopy (SEM) and laser confocal microscopy (CLSM). The contact angle between the sample and water was measured by contact angle measuring instrument. The composition of the sample was characterized by XRD, and the content and distribution of elements were characterized by EDS. The anticorrosion performance of superhydrophobic surface after treatment was tested by Modulab electrochemical workstation, and the effects of different processes on the superhydrophobic surface and corrosion resistance of the prepared metal substrate were systematically studied.
【学位授予单位】：烟台大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG174.4

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