有机添加剂对铝阳极氧化膜性能的影响
Influence of Organic Additives on Performance of Aluminum Anodic Oxide Films
摘 要
测定了含不同有机添加剂的硫酸基电解液所得的铝阳极氧化膜的厚度、硬度及耐蚀性,并结合电化学阻抗(EIS)技术对其耐蚀机理进行分析.结果表明:有机添加剂的加入有利于提高氧化铝膜的硬度、厚度和耐蚀性,其中硫酸+硫酸铈+柠檬酸体系效果最佳.这是因为稀土盐与柠檬酸形成的稳定大分子络合物堵塞孔口,阻碍侵蚀性离子进入孔内,使膜的耐蚀性增加.
有机添加剂
耐蚀性
EIS
aluminum anodic oxide
organic additive
corrosion resistance
EIS
Abstract
Aluminum anodic oxide (AAO) films were fabricated in sulfuric acid-based solution containing different organic additives,and the thickness,hardness and corrosion resistance of AAO films were measured respectively.Electrochemical impedance spectroscopy (EIS) technique was used to analyze the corrosion resistance mechanism of AAO films.The results indicated that adding organic additives could improve the thickness,hardness and corrosion resistance of AAO films,and sulfuric acid + cerium salt + citric acid system was the best additive.The corrosion resistance of AAO films were improved greatly because the stable macromolecular complex ions formed by the synergistic effect of cerium salt and citric acid,which could impede the entering of aggresive ions.
中图分类号 TG174.45
所属栏目 试验研究
基金项目
收稿日期 2009/4/10
修改稿日期 2009/5/8
网络出版日期
作者单位点击查看
备注李淑英,教授.
引用该论文: DONG Chun-xiao,LI Shu-ying,XIE Pin-pin,FAN Hong-qiang. Influence of Organic Additives on Performance of Aluminum Anodic Oxide Films[J]. Corrosion & Protection, 2010, 31(3): 216～219
被引情况:
【1】陈朝英,魏晓伟,王建,魏德超, "温度梯度降温对铝合金阳极氧化膜性能的影响",腐蚀与防护 33, 244-246(2012)
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参考文献
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【3】吴 敏,孙 勇.铝及其合金表面处理的研究现状[J].表面技术,2003,32(3):31-33.
【4】杨哲龙,安茂忠.稀土添加剂对LY12铝合金硬质氧化膜性能的影响[J].材料工程,1998(7):6-8.
【5】江小雪,赵乃勤.多孔氧化铝膜的制备与形成机理的研究概况[J].功能材料,2005,4(36):487-489.
【6】Ding G Q,Zheng M J.Fabrication of controllable free-standing ultra thin porous alumina membranes[J].Nanotechnology,2005,16:1285-1289.
【7】Suay J J,Giménez E.Characterization of anodized and sealed aluminum by EIS[J].Corrosion Science,2003,45(3):611-624.
【8】赵旭辉,左禹.铝阳极氧化膜在去离子水中的自封闭效应[J].腐蚀与防护,2006,27(11):555-557.
【9】Wang Hui,Wang Haowei.Synergistic effect of rare earth salt and organic acid in the anodization of aluminum in phosphoric acid[J].J Mater Sci,2006,41:4759-4763.
【10】曹楚南,张鉴清.电化学阻抗谱导论[M].北京:科学出版社,2002,154-167.
【11】Moutarlier V,Gigandet M P.EIS characterisation of anodic films formed on 2024 aluminium alloy in sulphuric acid containing molybdate or permanganate species[J].Corrosion Science,2005,47:937-951.
【12】宋玉林,董贞俭.稀有金属化学[M].辽宁大学出版社,1991:559-589.
【13】江组成,蔡汝秀.稀土元素分析化学[M].科学出版社,2000:13-50.
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