不同方法评价几种工艺封闭的铝合金阳极氧化膜的耐蚀性
Corrosion Resistance Evaluation of Anodic Films on Aluminum Alloys Sealed with Several Processes by Different Methods
摘 要
使用磷-铬酸失重试验、铜加速醋酸盐雾试验和电化学技术研究了铈盐封闭的铝合金阳极氧化膜的耐蚀性,并与氟化镍封闭、沸水封闭和重铬酸钾封闭方法进行了对比.铈盐封闭的铝合金阳极氧化膜在磷-铬酸失重试验中失重小于30 mg/dm2,达到了GB/T5237.2-2000中的规定.铜加速醋酸盐雾试验和电化学试验表明,铈盐封闭的铝合金阳极氧化膜的耐蚀性与其它几种方法封闭的铝合金阳极氧化膜的耐蚀性相当.磷-铬酸失重试验、铜加速醋酸盐雾试验和电化学技术这几种方法都可以用来评价铝阳极氧化膜的耐蚀性,且评价结果基本一致.稀土封闭绿色环保,封闭效果好,应用前景良好.
阳极氧化膜
绿色封闭
铈盐封闭
aluminum alloy
anodic film
green sealing
cerium salt sealing
Abstract
The corrosion resistance of anodic films on aluminum alloys sealed with cerium salt was studied by using mass loss immersion testing in phosphoric-chromic acid solution,metallic coatings-copper accelerated acetic acid salt spray testing (CASS testing) and electrochemical methods,and compared with the anodic films sealed by the methods of nickel fluonide,potassium dichromate and boiling water.The mass loss rate of aluminum alloy anodic film sealed with cerium salt was lower than 30 mg/dm2 after immersing in phosphoric-chromic acid solution,which matched the Chinese Standard GB/T5237.2-2000.The results of CASS testing and electrochemical methods showed that the corrosion resistance of aluminum alloy anodic film sealed with cerium salt was close to that of aluminum alloy anodic films sealed with other methods.The rare-earth salt sealing method is environmental friendly and can get the film with good performance.Its application prospect is very good.
中图分类号 TG174.3
所属栏目 试验研究
基金项目 国家科技支撑计划(编号:2006BAE03B04-02)
收稿日期 2009/9/1
修改稿日期 2009/9/25
网络出版日期
作者单位点击查看
备注赵景茂,教授,博士生导师.
引用该论文: ZHAO Jing-mao,DUAN Li-qing,LIU Jun-chao. Corrosion Resistance Evaluation of Anodic Films on Aluminum Alloys Sealed with Several Processes by Different Methods[J]. Corrosion & Protection, 2010, 31(7): 508～511
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参考文献
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【5】李久青,卢翠英.铈盐在铝合金阳极氧化后处理工序中的应用[J].北京科技大学学报,1998,20(3):281-285.
【6】于兴文,严川伟,曹楚南.LY12铝合金阳极氧化稀土封孔工艺及性能的研究[J].电镀与涂饰,2001,20(5):1-4.
【7】李凌杰,雷惊雷,李 荻,等.铈、锂盐对铝阳极氧化膜的协同封闭作用[J].物理化学学报,2003,19(10):922-926.
【8】李启征,左禹,赵旭辉,等.复合封孔对铸铝阳极氧化膜耐蚀性的影响[J].材料保护,2007,40(6):14-16.
【9】赵景茂,陈胜利,赵旭辉,等.铈盐在电场作用下对LY12铝合金阳极氧化膜的封闭作用[J].中国表面工程,2008,21(1):28-32.
【10】朱祖芳.铝合金阳极氧化与表面处理技术[M].北京:化学工业出版社,2004,296-297.
【11】Hitzig J,Jüttner K,Lorenz W J,et al.AC-impedance measurements on porous aluminum oxide films[J].Corrosion Science,24(11/12):945-952.
【12】赵旭辉,左禹,赵景茂.几种封闭方法处理后铝阳极氧化膜的耐蚀性比较[J].腐蚀与防护,2006,27(8)400-403.
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