作　　者： ; ; ;

机构地区： 华南理工大学材料科学与工程学院

出　　处： 《功能材料》 2010年第A02期260-263,共4页

摘　　要： 以Ti的化合物为主要原料,Ni为着色剂,实现在常温下对6063铝合金的无铬化学钝化处理,3min内快速成膜,钝化膜为带淡绿的银灰色。通过铬酸盐耐腐蚀测试,钛-镍膜耐铬酸盐点滴腐蚀时间>120s;SEM表明钛-镍膜在铝表面分布均匀,膜厚在1～3μm之间;膜层主要含钛、镍和铝等元素;通过电化学分析,钛钝化膜及Ni2+着色钛膜腐蚀电流分别为2.120、3.658μA,比铝合金的腐蚀电流14.919μA降低,着色钛膜具有理想钝化效果;通过交流阻抗模拟,Ni着色Ti膜为C1/R1/(L2+R2)结构。 With Ti compounds as main starting material,Ni as coloring agents,chromium-free conversion and treatment for 6063 aluminum at room temperature has been developed.The performance of its treatment fluid can be of steady function without adding oxidants additionally,fast filming in 3min.Through adding potassium makes the conversion coating from colorless into iridescence,which solves the coloring of titanium conversion coating.Through chromate corrosion solution test,the corrosion time of titanium coating is more than 120s;through observation,titanium is uniformly distributed on the surface of aluminum and the thickness between the 1-3μm,there are mainly aluminum,titanium,nickel elements in film layer.Through electrochemical detection,titanium passivation film and Ni ^2＋colored titanium film corrosion currents（Icorr） were 2.120,3.658μA.The aluminum alloy corrosion current is 14.9196μA;shown by AC impedance spectroscopy,the aluminum alloy specimen has been effectively passivated in the solution,Ni colored Ti film was C1/R1/（L2＋R2） structure.

关 键 词： 铝合金 着色 钛 镍膜 无铬钝化

领　　域： [电子电信]