Anodizing of AZ91D magnesium alloy using environmental friendly alkaline borate-biphthalate electrolyte  

邻苯二甲酸氢钾-硼酸盐电解液中AZ91D镁合金的阳极氧化(英文)

作　　者：刘妍[1,2] 杨富巍[2] 卫中领[3] 张昭[1] 

机构地区：[1]浙江大学化学系,杭州310027 [2]天水师范学院化学系,天水741000 [3]中国科学院镁合金技术中心,嘉兴314051

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第7期1778-1785,共8页中国有色金属学报（英文版）

基　　金：Projects (50771092,21073162) supported by the National Natural Science Foundation of China;Project (08JC1421600) supported by the Science and Technology Commission of Shanghai,China;Project (2008AZ2018) supported by the Science and Technology Bureau of Jiaxing,China

摘　　要：A kind of environmental friendly anodizing routine for AZ91D magnesium alloy,based on an alkaline borate-potassium acid phthalate（KAP） electrolyte,was studied.The effect of KAP on the properties of the anodized film was investigated by scanning electron microscopy（SEM）,X-ray diffraction（XRD）,energy dispersive spectrometry（EDS）,potentiodynamic polarization and electrochemical impedance spectroscopy（EIS）,respectively.The results showed that the anodizing process,surface morphology,thickness,phase structure and corrosion resistance of the anodized film were strongly dependent on the concentration of KAP.In the presence of adequate KAP,a compact and smooth anodized film with excellent corrosion resistance was obtained.研究 AZ91D 镁合金在邻苯二甲酸氢钾-硼酸盐碱性环保型电解液中的阳极氧化行为。考察邻苯二甲酸氢钾对阳极氧化膜层性能的影响,并利用扫描电镜(SEM)、X 射线衍射(XRD)、动电位极化和电化学阻抗(EIS)进行分析表征。结果表明,邻苯二甲酸氢钾的浓度对阳极氧化成膜过程,氧化膜的表面形貌、厚度、相结构和耐腐蚀性能都有重要影响。在硼酸盐电解液中加入适量的邻苯二甲酸氢钾以后,制得的阳极氧化膜表面光滑、致密,与镁合金基体的结合力强,具有优异的耐腐蚀性能。

关 键 词：ANODIZING magnesium alloy potassium acid phthalate environmental friendly electrolyte corrosion performance 

分 类 号：TG174.4[金属学及工艺—金属表面处理]