六次甲基四胺对AZ91D镁合金阳极氧化的影响  

Effect of hexamethylenetetramine on anodic oxidation of AZ91D magnesium alloy

作　　者：付广艳[1] 陈兆苏 任雷 刘华成 FU Guangyan;CHEN Zhaosu;REN Lei;LIU Huacheng(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学机械与动力工程学院,辽宁沈阳110142

出　　处：《电镀与涂饰》2022年第2期92-95,共4页Electroplating & Finishing

基　　金：辽宁省教育厅科学研究项目(LJ2020015)。

摘　　要：向主要成分为氢氧化钠、硅酸钠与对苯二甲酸的基础电解液中添加六次甲基四胺(HMTA),在AZ91D镁合金表面制备阳极氧化膜。采用扫描电镜(SEM)、光学显微镜、X射线衍射仪(XRD)及极化曲线测量,分析了六次甲基四胺对镁合金阳极氧化过程以及阳极氧化膜的形貌、相组成和耐腐蚀性能的影响。结果表明:在镁合金恒电流阳极氧化过程中,六次甲基四胺能够提升氧化电压,抑制弧光放电,令膜层中SiO_(2)相增多,膜层微孔数减少,致密度和厚度都得到提升,进而提高膜层的耐腐蚀性能。An anodic oxide film was prepared on the surface of AZ91D magnesium alloy by adding hexamethylenetetramine(HMTA)to an electrolyte comprising sodium hydroxide,sodium silicate,and p-phthalic acid(PTA).The effect of hexamethylenetetramine on the anodic oxidation process as well as the morphology,phase constitution,and corrosion resistance of the anodic oxide film was analyzed by optical microscopy,scanning electron microscopy(SEM),X-ray diffraction(XRD),and polarization curve measurement.The results showed that the addition of HMTA to the electrolyte increased the oxidation voltage during the amperostatic anodic oxidation of magnesium alloy,and inhibited arc discharge.The anodic oxide film prepared with HMTA in the electrolyte had more SiO_(2) phases,less micropores(i.e.higher compactness),and larger thickness.Therefore,it had better corrosion resistance than that prepared from the electrolyte without HMTA.

关 键 词：镁合金 阳极氧化 六次甲基四胺 耐腐蚀性能 

分 类 号：TG174.451[金属学及工艺—金属表面处理] TG178[金属学及工艺—金属学]