高锰酸钾对AZ91D镁合金微弧氧化膜质量的影响  

Effect of Potassium Permanganate on Quality of AZ91D Magnesium Alloy Microarc Oxide Film

作　　者：陈忠元 王紫龙 叶至淳 江尧尧 刘万辉 CHEN Zhong-yuan;WANG Zi-long;YE Zhi-chun;JIANG Yao-yao;LIU Wan-hui(School of Automotive Engineering,Changshu Institute of Technology,Jiangsu Changshu 215500,China)

机构地区：[1]常熟理工学院汽车工程学院,江苏常熟215500

出　　处：《广州化工》2024年第9期18-19,31,共3页GuangZhou Chemical Industry

基　　金：江苏省大学生实践创新训练计划项目(No:202110333002Z);常熟理工学院毕业设计重点资助课题(No:LG22077)。

摘　　要：采用微弧氧化(MAO)的方法在硅酸盐体系碱性电解质液在AZ91D镁合金基体表面上获得了颜色均匀、致密性好的微弧氧化陶瓷膜。采用扫描电子显微镜(SEM)观察陶瓷膜微观形貌,用X射线衍射仪(XRD)分析了物相,用盐水浸泡试验考察了陶瓷膜防腐蚀性能。讨论了高锰酸钾浓度对陶瓷膜的表面形貌和性能的影响。结果表明,微弧氧化膜主要由MgAl_(2)O_(4)和MgO相组成。当高锰酸钾添加量为0.5 g/L,柠檬酸为1.5 g/L时所得膜层更加致密,膜层的综合性能最好。The micro-arc oxidation ceramic film with uniform color and good compactness was obtained on the surface of AZ91D magnesium alloy matrix in the alkaline electrolyte liquid of the silicate system by micro-arc oxidation(MAO)method.The microscopic morphology of the ceramic film was observed by scanning electron microscope(SEM),the phase was analyzed by X-ray diffraction(XRD),and the corrosion resistance of the ceramic film was investigated by salt water immersion test.The effect of potassium permanganate concentration on the surface morphology and properties of ceramic film was discussed.The results showed that the micro-arc oxide film was mainly composed of MgAl_(2)O_(4) and MgO phases.When the addition amount of potassium permanganate was 0.5 g/L and citric acid was 1.5 g/L,film layer was more dense,and the comprehensive performance of the film layer was the best.

关 键 词：微弧氧 AZ91D 镁合金 高锰酸钾 

分 类 号：TG174.4[金属学及工艺—金属表面处理]