宇航材料工艺2025，Vol.55Issue(6)：68-75,8.DOI:10.12044/j.issn.1007-2330.2025.06.009
工艺参数对MB8镁合金微弧氧化膜层结构和耐蚀性的影响
Effect of Process Parameters on the Structure and Corrosion Resistance of Micro Arc Oxidation Film Layer of MB8 Magnesium Alloy
摘要
Abstract
In order to enhance the corrosion resistance of magnesium alloys,a micro arc oxidation coating was prepared on the surface of MB8 magnesium alloy using micro arc oxidation technology.The performance of the micro arc oxidation coating was characterized using X-ray diffraction(XRD),scanning electron microscopy(SEM),electrochemical workstation,and coating thickness measurement.Based on an orthogonal experimental method,the influences of duty cycle,frequency,and oxidation time on the thickness,surface porosity,and corrosion current density of the micro arc oxidation coating were investigated.The results reveal that,compared to MB8 magnesium alloy,the corrosion current density of the micro arc oxidation coating decreased by two orders of magnitude,indicating a significant improvement in corrosion resistance.The order of importance on the thickness,porosity,and corrosion resistance of the coating was found to be duty cycle,frequency,and oxidation time,respectively.At a fixed frequency,the surface porosity of the coating initially increases and then decreases as the duty cycle increases.The optimal performance of the membrane is achieved under conditions of a 50％duty cycle,a frequency of 1.8 kHz,and an oxidation time of 15 minutes,resulting in a coating thickness of 18.6 μm,a porosity of 6.21％,and a corrosion current density of 2.56×10-6 A/cm2.关键词
镁合金/微弧氧化/频率/占空比/氧化时间/耐蚀性Key words
Magnesium alloy/Micro arc oxidation/Frequency/Duty cycle/Oxidation time/Corrosion resistance分类
矿业与冶金引用本文复制引用
姜炳春,文泽军,侯杰,黄鑫婷,卢立伟..工艺参数对MB8镁合金微弧氧化膜层结构和耐蚀性的影响[J].宇航材料工艺,2025,55(6):68-75,8.基金项目
广东省青年创新人才项目(2022KQNCX116) （2022KQNCX116）
东莞市科技特派员项目(20231800500602) （20231800500602）
教科创教学相长项目化团队(GKJXXZ2023026) （GKJXXZ2023026）
大学生创新创业训练计划项目(202213719001、202313719003) （202213719001、202313719003）
广东科技学院节能减排创新团队(GKY-2022CQTD-1) （GKY-2022CQTD-1）
