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材料工程  2017, Vol. 45 Issue (7): 19-26    DOI: 10.11868/j.issn.1001-4381.2016.001042
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
包铝层和氧化时间对2E12铝合金硫酸阳极氧化及膜层性能的影响
陈高红1, 胡远森2, 于美2, 刘建华2, 李国爱1
1. 北京航空材料研究院, 北京 100095;
2. 北京航空航天大学 材料科学与工程学院, 北京 100191
Effects of Alclad Layer and Anodizing Time on Sulfuric Acid Anodizing and Film Properties of 2E12 Aluminum Alloy
CHEN Gao-hong1, HU Yuan-sen2, YU Mei2, LIU Jian-hua2, LI Guo-ai1
1. Beijing Institute of Aeronautical Materials, Beijing 100095, China;
2. School of Materials Science and Engineering, Beihang University, Beijing 100191, China
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摘要 对保留表面包铝和去除包铝的2E12-T3铝合金采用硫酸阳极氧化处理工艺,研究了包铝层和氧化时间对铝合金阳极氧化行为及膜层耐蚀性的影响。采用扫描电子显微镜观察氧化膜的表面以及截面形貌,应用动电位扫描极化曲线和电化学阻抗谱对膜层的电化学性能进行分析。结果表明:两种铝合金表面均能形成具有防护性能的阳极氧化膜,膜层随氧化时间延长而增厚。富铜的第二相颗粒会使得不带包铝的2E12铝合金氧化膜具有更多孔洞缺陷,甚至出现微裂纹。保留包铝的2E12铝合金表面氧化膜更厚,孔洞缺陷少,耐蚀性更好。阳极氧化30min和45min的2E12铝合金阳极氧化膜具有较低的腐蚀电流和较高的多孔层阻抗,耐蚀性好。
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陈高红
胡远森
于美
刘建华
李国爱
关键词 2E12铝合金包铝层阳极氧化时间耐蚀性    
Abstract:Alclad and unclad 2E12 aerospace aluminum alloy were treated by sulfuric acid anodic oxidation. The effects of alclad layer and anodizing time on the anodization behaviour and corrosion resistance of anodic oxide layer on 2E12 aluminum alloy were studied. Surface and cross-section morphology of anodic oxide films were observed by scanning electron microscopy. The electrochemical properties of anodic oxide films were analyzed by potentiodynamic polarization curve and electrochemical impedance spectroscopy. The results show that the protective anodic oxide layers are formed on alclad and unclad 2E12 aluminum alloy. The film thickness increases with anodizing time extending. The copper rich second phase particles lead to more cavity defects and even micro cracks on anodic oxide films of unclad 2E12 aluminum alloy. The anodic oxide films on alclad 2E12 aluminum alloy are thicker and have fewer cavity defects, resulting in better corrosion resistance. The films obtained after 30min and 45min anodic oxidation treatment exhibit lower corrosion current and higher impedance of the porous layer than other anodizing time.
Key words2E12 aluminum alloy    alclad layer    anodizing time    corrosion resistance
收稿日期: 2016-09-05      出版日期: 2017-07-21
中图分类号:  TG174.451  
通讯作者: 于美(1981-),女,副教授,博士,主要研究方向为纳米功能材料的制备及性能研究、材料腐蚀与防护研究,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),E-mail:yumei@buaa.edu.cn     E-mail: yumei@buaa.edu.cn
引用本文:   
陈高红, 胡远森, 于美, 刘建华, 李国爱. 包铝层和氧化时间对2E12铝合金硫酸阳极氧化及膜层性能的影响[J]. 材料工程, 2017, 45(7): 19-26.
CHEN Gao-hong, HU Yuan-sen, YU Mei, LIU Jian-hua, LI Guo-ai. Effects of Alclad Layer and Anodizing Time on Sulfuric Acid Anodizing and Film Properties of 2E12 Aluminum Alloy. Journal of Materials Engineering, 2017, 45(7): 19-26.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001042      或      http://jme.biam.ac.cn/CN/Y2017/V45/I7/19
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