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材料工程  2015, Vol. 43 Issue (1): 24-29    DOI: 10.11868/j.issn.1001-4381.2015.01.005
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
硝酸铈封闭对2A12铝合金己二酸-硫酸阳极氧化膜耐蚀性的影响
于美1, 马荣豹1, 刘建华1, 李松梅1, 王一博1, 刘英智2
1. 北京航空航天大学 材料科学与工程学院 空天先进材料与服役教育部重点实验室, 北京 100191;
2. 北京星航机电设备厂, 北京 100074
Effects of Cerous Nitrate Sealing on Corrosion Resistance of Adipic-sulfuric Acid Anodic Oxide Films on 2A12 Aluminum Alloy
YU Mei1, MA Rong-bao1, LIU Jian-hua1, LI Song-mei1, WANG Yi-bo1, LIU Ying-zhi2
1. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), Materials Science and Engineering School, Beihang University, Beijing 100191, China;
2. Beijing Xinghang Electrical Equipment Factory, Beijing 100074, China
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摘要 研究了硝酸铈溶液封闭对2A12铝合金己二酸-硫酸阳极氧化膜耐蚀性的影响,通过盐雾腐蚀实验、电化学动电位极化扫描法和电化学阻抗谱法(EIS)对阳极氧化膜的耐蚀性进行研究,采用场发射扫描电镜(FE-SEM)观察试样封闭前后的表面微观形貌,并与稀铬酸封闭、沸水封闭传统工艺进行比较.结果表明:采用硝酸铈溶液封闭的2A12铝合金阳极氧化膜腐蚀电流减小,阻抗值增大,耐腐蚀性增强.阳极氧化膜表面呈致密的花瓣状,多孔层内及氧化膜表面附着一层致密铈的氧化物或氢氧化物,其耐蚀性优于沸水封闭,与稀铬酸封闭相当.
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于美
马荣豹
刘建华
李松梅
王一博
刘英智
关键词 铝合金己二酸-硫酸阳极氧化膜封闭硝酸铈    
Abstract:Effects of cerous nitrate sealing on corrosion resistance of adipic-sulfuric acid anodic oxide films on 2A12 aluminum alloy were investigated. The corrosion resistance of anode oxide films was studied by using salt spray tests, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The surface microtopography of anodic oxide films was observed by using the field emission scanning electron microscope (FE-SEM) and was compared with diluted chromic acid sealing and boiling water sealing. The results show that after sealing in the cerous nitrate solution, corrosion current of the anodic oxide films decreases, the impedance increases and the corrosion resistance is enhanced significantly. The surface morphologies of anodic oxide films are petaloid like with some cerium oxide or cerium hydroxide adhering to surface of the anodic oxide films and porous layer. The corrosion resistance of films with cerous nitrate sealing is better than that of films with boiling water sealing and are corresponded with diluted chromic acid sealing.
Key wordsaluminum alloy    adipic-sulfuric acid    anodic oxide film    sealing    cerous nitrate
收稿日期: 2013-06-27     
1:  TG174.451  
基金资助:国家自然科学基金资助项目(51271012)
通讯作者: 于美(1981-),女,副教授,主要从事腐蚀与防护、材料物理与化学方面研究工作,联系地址:北京市海淀区学院路37号北京航空航天大学材料科学与工程学院(100191),yumei@buaa.edu.cn     E-mail: yumei@buaa.edu.cn
引用本文:   
于美, 马荣豹, 刘建华, 李松梅, 王一博, 刘英智. 硝酸铈封闭对2A12铝合金己二酸-硫酸阳极氧化膜耐蚀性的影响[J]. 材料工程, 2015, 43(1): 24-29.
YU Mei, MA Rong-bao, LIU Jian-hua, LI Song-mei, WANG Yi-bo, LIU Ying-zhi. Effects of Cerous Nitrate Sealing on Corrosion Resistance of Adipic-sulfuric Acid Anodic Oxide Films on 2A12 Aluminum Alloy. Journal of Materials Engineering, 2015, 43(1): 24-29.
链接本文:  
http://jme.biam.ac.cn/jme/CN/10.11868/j.issn.1001-4381.2015.01.005      或      http://jme.biam.ac.cn/jme/CN/Y2015/V43/I1/24
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