脉冲方波对镁合金AZ91D阳极氧化的影响  

PULSE ANODIC OXIDATION OF AZ91 MAGNESIUM ALLOYS

作　　者：文强[1] 曹发和[1] 张昭[1] 张鉴清[1,2] 

机构地区：[1]浙江大学化学系,电化学与功能材料研究所,杭州310027 [2]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016

出　　处：《腐蚀科学与防护技术》2009年第2期182-184,共3页Corrosion Science and Protection Technology

基　　金：国家自然科学基金项目(50671095;50801056);国家重点基础研究计划项目(5133003D)

摘　　要：自制DSP控制的开关电源系统,实现了方波、交变方波、双极性方波和直流四种模式,并应用于AZ91D镁合金的阳极氧化.采用扫描电镜(SEM)、X射线衍射仪(XRD)、极化曲线和电化学阻抗谱研究了氧化膜的形貌、成分和腐蚀性能,初步探明脉冲电源的占空比,频率和电压等参数对阳极氧化过程和氧化膜耐蚀性能的影响.A pulse power source system was manufactured in the laroratory, which could output pulse with square wave, alternative square wave and ambipolar square wave as well as DC. With help of this pulse power source a smooth grey anodic film could be developed on AZ91 magnesium alloy. SEM, XRD, Tafel plot and electrochemical impedance spectroscopy（EIS） were employed to examine the composition, surface morphology and corrosion resistance of the anodic film. The effect of duty cycle, frequency, voltage and treatment time on process of anodization and corrosion resistance was investigated.

关 键 词：脉冲电源 阳极氧化 镁合金 耐蚀性能 

分 类 号：TG172.63[金属学及工艺—金属表面处理]