| 小孔腐蚀在铝电解电容器用铝箔质量评价中的应用 |
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| 引用本文： | 班朝磊,朱淑芹,侯加林. 小孔腐蚀在铝电解电容器用铝箔质量评价中的应用[J]. 表面技术, 2016, 45(3): 188-192. DOI: 10.16490/j.cnki.issn.1001-3660.2016.03.031 |
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| 作者姓名： | 班朝磊 朱淑芹 侯加林 |
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| 作者单位： | 聊城大学 材料科学与工程学院，山东 聊城252059;山东农业大学 机械与电子工程学院，山东 泰安217081;聊城大学 计算机学院,山东 聊城,252059;山东农业大学 机械与电子工程学院,山东 泰安,217081 |
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| 摘 要： | 阐述小孔腐蚀在铝电解电容器用铝箔质量评价中的应用机理。首先简要介绍电容器铝箔立方织构的形成过程和特征,及小孔腐蚀的一般电化学特点;然后模拟计算多晶体铝箔材料各晶面弹性模量、各晶面原子密度和各晶向原子密度;最后用HCl、HNO3、HF组成的特定侵蚀剂对电容器铝箔实施小孔腐蚀,用扫描电子显微镜(SEM)和光学显微镜(OM)对小孔腐蚀后的铝箔表面形貌与横截面形貌进行观察分析。电容器铝箔侵蚀后表面呈现大量正方形蚀孔,电容器铝箔发生小孔腐蚀具有方向性,蚀孔隧道总是沿着垂直或平行于铝箔表面的方向发展;100、110和111晶向的原子密度依次为2/a、2.12/a、1.15/a,a为晶胞参数,{100}、{110}和{111}晶面的原子密度依次为5/a2、4.24/a2、13.85/a2,{100}、{110}和{111}晶面的弹性模量依次为98.418、109.449、113.2678 GPa,蚀孔隧道活性尖端由{111}晶面构成以降低表面能,蚀孔隧道钝化壁由{100}晶面组成以保持钝化膜稳定。电容器铝箔正方形点蚀表面形貌与铝箔织构有特定的对应关系,织构{100}001含量可以通过计算铝箔表面正方形蚀坑面积的方法来估算。
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| 关 键 词： | 小孔腐蚀 铝电解电容器 铝箔 立方织构 局部腐蚀 钝化 |
| 收稿时间： | 2015-09-18 |
| 修稿时间： | 2016-03-20 |
Application of pitting in quality evaluation of aluminum foilfor aluminum electrolytic capacitor |
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| BAN Chao-lei,ZHU Shu-qin and HOU Jia-lin. Application of pitting in quality evaluation of aluminum foilfor aluminum electrolytic capacitor[J]. Surface Technology, 2016, 45(3): 188-192. DOI: 10.16490/j.cnki.issn.1001-3660.2016.03.031 |
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| Authors: | BAN Chao-lei ZHU Shu-qin HOU Jia-lin |
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| Affiliation: | 1. School of Materials Science and Technology, Liaocheng University, Liaocheng 252059, China;2. Mechanical and Electronic Engineering College, Shandong Agricultural University, Taian 271018, China,School of Computer Science, Liaocheng University, Liaocheng 252059, China and Mechanical and Electronic Engineering College, Shandong Agricultural University, Taian 271018, China |
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| Abstract: | The application of pitting in the measuring cubic texture content of Al foil for Aluminum electrolytic capacitor and electrochemical characteristics of pitting were introduced. Formation and feature of cubic texture of Al foil were also discussed. The elastic modulus of crystal plane in polycrystalline materials as well as the atomic density of crystal plane and crystal orientation were simulated and calculated. The inherent relation between material grain orientation and pitting orientation are explored and further proved by experiments. |
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| Keywords: | pitting Aluminum electrolytic capacitor Aluminum foil cubic texture |
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