Al阳极氧化及涂膜后处理的微观组织及性能研究  

Study on microstructures and properties of Al treated by anodic oxidation and PTFE coating

作　　者：杨剑冰[1] 李伟洲[1] 陈荣立 刘伟[1] 

机构地区：[1]广西大学材料科学与工程学院,广西南宁530004 [2]广西南南铝业股份有限公司,广西南宁530031

出　　处：《广西大学学报（自然科学版）》2012年第3期600-606,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：广西自然科学基金重点项目(2010GXNSFD013006);广西自然科学基金创新研究团队(2011GXNSFF018001);广西大学有色金属及材料加工新技术教育部重点实验室开放基金(GXKFJ-14)

摘　　要：为了提高铝的硬度及耐蚀性能,利用硫酸阳极氧化法对铝板材进行表面处理。采用X射线衍射仪、扫描电子显微镜、显微硬度计和滴碱试验等对获得的氧化膜进行观察和性能分析。结果表明,铝硫酸阳极氧化膜具有多孔性,氧化膜主要以非晶态的形式存在,膜厚度处于5～19μm。随着阳极氧化时槽电压、电流密度和氧化时间的增加,氧化膜的厚度、耐蚀性和硬度增加;提高电解液温度和浓度,氧化膜的硬度、耐蚀性和厚度则下降。对氧膜化进行PTFE涂膜后处理能有效地改善氧化膜的多孔结构。In order to improve the hardness and corrosion resistance of Al, the surface of Al plate was treated by the anodic oxidation method. The oxide films were observed by X-ray diffractometer, scanning electron microscope, and the property were analyed by micro hardness tester and alkali drops test. The results indicate that the films formed are porous, mainly in the form of amorphous; the thickness of the film are 5 - 19 μm. With the increase of bath voltage, current density and oxida- tion time of the anodic oxidation, oxidation film thickness, corrosion resistance and hardness are in- creased; with the increase of electrolyte concentration and temperature, the hardness, corrosion re- sistance and thickness of the oxide film are declined. To improve the porous structure of the oxide film, the surface of oxide film was treated with PTFE films. The results indicate that the PTFE films can effectively improve the structure of the oxide film porous.

关 键 词：阳极氧化法 PTFE涂膜 氧化膜 耐蚀性 多孔 

分 类 号：TG17[金属学及工艺—金属表面处理]