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。
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.
出处
《腐蚀与防护》
CAS
北大核心
2014年第6期533-536,549,共5页
Corrosion & Protection
基金
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)
关键词
铝型材
丝状腐蚀
电化学
极化曲线
aluminum profile
filiform corrosion
electrochemical polarization curve
