AZ 31镁合金阳极氧化工艺参数的优化研究  

Optimization of Anodizing Process Parameters for AZ 31 Magnesium Alloy

作　　者：陈利[1,2] 屠晓华[2,3] 卫中领[4] 范松岩[4] 吴建一[1,2,3] 

机构地区：[1]常州大学石油化工学院,江苏常州213164 [2]嘉兴学院生物与化学工程学院,浙江嘉兴314001 [3]嘉兴市化工清洁工艺重点实验室,浙江嘉兴314001 [4]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《电镀与环保》2012年第3期39-42,共4页Electroplating & Pollution Control

基　　金：上海市重点基础研究项目(No.08JC1421600);嘉兴市重点科技计划项目(No.2009AZ2009;No.2011AZ2010);浙江省教育厅科研计划项目(No.Y201122429)

摘　　要：采用正交实验对AZ 31镁合金在碱性电解液中进行阳极氧化的工艺参数进行优化。考察了氧化时间、电流密度、脉冲频率和占空比对阳极氧化膜性能的影响,获得最佳阳极氧化工艺参数为:氧化时间15min,电流密度1.0A/dm2,脉冲频率200Hz,占空比10%。采用X射线衍射仪(XRD)、扫描电镜(SEM)和动电位极化曲线等检测手段研究了阳极氧化膜的结构、表面形貌和耐蚀性。结果表明:经优化工艺制得的阳极氧化膜,其主要成分为MgO,Al2O3和MgAl2O4,膜层孔隙分布均匀、致密,耐蚀性大幅提高。The technological parameters for anodizing AZ 31 magnesium alloy in alkaline electrolyte were optimized by orthogonal experiment. The effects of anodizing time, current density, pulse frequency and duty ratio on the properties of the anodized film were studied, obtaining an optimal anodizing process： anodizing time 15 min, current density 1.0 A/dm2, pulse frequency 200 Hz and duty ratio 10 ~ . The phase composition, surface morphology and corrosion resistance of the anodized film were investigated respectively by XRD, SEM and potentiodynamic polarization curves. It is shown that the anodized film obtained by the optimized process is mainly composed of MgO, Al2Oa and MgAl204, which is compact and uniform in pore distribution, resulting in an improved corrosion resistance.

关 键 词：镁合金 阳极氧化 正交实验 

分 类 号：TG174[金属学及工艺—金属表面处理]