铝合金阳极氧化对氧化膜显微硬度和粘接性能的影响

发布时间：2018-04-28 14:18

本文选题：铝合金 + 阳极氧化　；参考：《材料保护》2017年01期

【摘要】：为了获得膜层显微硬度和粘接强度都较高的铝合金阳极氧化工艺,通过阳极氧化在2024铝合金表面制备氧化膜,根据正交试验来确定氧化工艺参数对铝合金阳极氧化膜显微硬度和粘接性能的影响,采用X射线衍射仪(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)等分析氧化膜的相组成、化学组成和表面形貌,并研究电流密度对氧化膜厚度的影响以及氧化膜厚度对膜层显微硬度和粘接强度的影响。结果表明:氧化工艺参数对氧化膜显微硬度的影响程度为电流密度电解液中H_2SO_4浓度氧化时间;采用2种胶粘剂粘接后,氧化工艺参数对氧化膜粘接强度的影响程度有所不同,然而电流密度均为最主要的影响因素;经过阳极氧化处理,铝合金表面的显微硬度和粘接强度均有很大提高,快固结构胶的粘接强度比改性丙烯酸酯胶的高;铝阳极氧化膜的厚度随电流密度增加而增大,在适宜的电流密度范围内氧化膜厚度的增加会导致膜层显微硬度和粘接强度的增大;氧化膜的相组成为非晶结构,主要元素为Al和O,均不因电流密度的变化而变化;铝合金阳极氧化膜表面形貌的优劣、孔隙率与氧化膜显微硬度及粘接强度的大小密切相关。
[Abstract]:In order to obtain the anodizing process of aluminum alloy with high microhardness and bonding strength, the oxide film was prepared on the surface of 2024 aluminum alloy by anodic oxidation. According to the orthogonal test, the effect of oxidation process parameters on the microhardness and bonding properties of anodic oxide film of aluminum alloy was determined. The phase composition of the oxide film was analyzed by X-ray diffractometer, X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and so on. The effect of current density on the thickness of the oxide film and the influence of the thickness of the oxide film on the microhardness and bonding strength of the film were studied. The results show that the influence of oxidation process parameters on the microhardness of oxide film is the oxidation time of H_2SO_4 concentration in the current density electrolyte, and the influence of oxidation process parameters on the bonding strength of oxide film is different after two kinds of adhesives are used. However, the current density is the most important factor. After anodizing, the microhardness and bonding strength of aluminum alloy surface are improved greatly, and the bonding strength of fast solid structural adhesive is higher than that of modified acrylate adhesive. The thickness of aluminum anodic oxide film increases with the increase of current density, and the increase of oxide film thickness in the appropriate current density range will lead to the increase of microhardness and bonding strength of the film, and the phase composition of the oxide film is amorphous structure. The main elements are Al and O, which do not change with the change of current density, and the surface morphology and porosity of anodic oxide film of aluminum alloy are closely related to the microhardness and bonding strength of the film.
【作者单位】：广西农产资源化学与深度利用重点实验室(培育基地)玉林师范学院化学与食品科学学院;北京化工大学材料科学与工程学院;
【基金】：2016年度广西高校中青年教师基础能力提升项目(KY2016YB369) 2014年度玉林师范学院校级科研项目(2014YJYB06)资助
【分类号】：TG174.451

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