带喷涂层的6063铝合金型材丝状腐蚀性能的电化学研究
Electrochemical Research of Filiform Corrosion of Painted 6063 Aluminum Alloy Profile
摘 要
采用极化曲线与交流阻抗谱等电化学方法对带喷涂层的6063铝合金型材的丝状腐蚀速率进行了研究，并与恒温恒湿箱评价结果进行了对比，分析了6063铝合金中过量的Cu、Fe合金元素成分、铬化与Ti-Zr体系无铬化前处理方法等因素对丝状腐蚀的影响。研究发现回收铝合金带来的超标Cu元素、Mn元素均会增大6063铝合金的丝状腐蚀速度，铬化处理后铝型材的耐丝状腐蚀性能优于Ti-Zr系钝化处理。
丝状腐蚀
电化学
极化曲线
aluminum profile
filiform corrosion
electrochemical polarization curve
Abstract
Electrochemical polarization curves and electrochemical impedance spectroscopy were used to study the filiform corrosion rate of the painted 6063 aluminum profile, and the corrosion results were also compared with those evaluated with the constant temperature and humidity box testing. The effects of excessive alloy elements of Cu and Mn in 6063 aluminium alloy, pretreatment methods of chrome based passivation and Ti-Zr based chemical conversion upon the corrosion were also analyzed. It is found that the surplus recycled elements Cu and Mn will accelerate the filiform corrosion of the 6063 aluminium alloy, and the painted aluminum profile passivated in chrome based solution has better anti-corrosion performance than that treated in Ti-Zr based solution.
中图分类号 TG174 TB37
所属栏目 试验研究
基金项目 教育部重点科技创新项目(211129); 广东省自然科学基金资助项目(52012010010244)
收稿日期 2013/8/20
修改稿日期
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联系人作者陈东初(cdcever@163.com)
备注陈东初(1972-),教授,博士,从事腐蚀与防护相关专业研究,
引用该论文: YANG Huan,CHEN Dong-chu,PAN Xue-zhu,YE Shu-lin. Electrochemical Research of Filiform Corrosion of Painted 6063 Aluminum Alloy Profile[J]. Corrosion & Protection, 2014, 35(6): 533
被引情况:
【1】马天凤,李泽,程艳艳, "镁合金点焊接头组织的耐蚀性",腐蚀与防护 36, 640-642(2015)
【2】马天凤,李泽,程艳艳, "镁合金焊点表面化学镀镍磷膜层分析",腐蚀与防护 37, 43-46(2016)
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参考文献
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【2】田秀云,杜洪曾,吴志巨. MD-82型飞机蒙皮的丝状腐蚀与防腐改进措施[J]. 民用飞机设计与研究,2004(2):46-49.
【3】朱祖芳. 建筑铝型材聚合物膜下的丝状腐蚀[J]. 腐蚀与防护,1999,20(6):255-256.
【4】LEBOZEC N,PERSSON D,THIERRY D. Effect of climatic parameters on filiform corrosion of coated aluminum alloys[J]. Corrosion,2004,60(6):584-593.
【5】NORDLIEN J H,DEFRANCQ J,ZST W,et al. Filiform corrosion formation on painted aluminium extrusions[J]. Materials and Corrosion,2000,51(7):473-480.
【6】卫芳,刘彬,彭颋,等. 钢制药筒丝状腐蚀加速试验方法研究[J]. 装备环境工程,2009,6(2):18-21.
【7】文邦伟,张伦武,汪学华. 重防蚀涂装体系在广岛和重庆的自然环境试验[J]. 材料保护,2005,38(3):21-24.
【8】肖钢,黎靓. 热处理状态对铝合金抗丝状腐蚀的影响[J]. 铝加工,1999,22(2):30-32.
【9】舒德学,皮玉龙,罗勇. 涂膜下的丝状腐蚀[J]. 装备环境工程,2004,1(3):74-78.
【10】刘晓方,江良洲,陈桂明,等. 铝合金AA6061-T4的丝状腐蚀图像分析[J]. 腐蚀科学与防护技术,2007,19(1):54-57.
【11】MOL J M C,HINTON B R W,VAN DER WEIJDE D H,et al. A filiform corrosion and potentio-dynamic polarisation study of some aluminium alloys[J]. Journal of Material Science,2000,35(7):1629-1639.
【12】FEDRIZZI L,BIANCHI A,DEFLORIANB F,et al. Effect of chemical cleaning on the corrosion behaviour of painted aluminium alloys[J]. Electrochimica Acta,2002,47:2159-2168.
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