军用装备镁合金表面微弧氧化层SEM微观形貌及耐蚀性分析  

Analysis of SEM Microstructure and Corrosion Resistance of Micro Arc Oxidation Coatings of Military Equipment Magnesium Alloy

作　　者：李新[1] 邱骥[1] 刘谦[1] 朱海燕[1] 

机构地区：[1]装甲兵工程学院装备再制造工程系

出　　处：《装甲兵工程学院学报》2011年第5期91-93,共3页Journal of Academy of Armored Force Engineering

基　　金：国防科技重点实验室基金项目(9140C8504030810)

摘　　要：利用微弧氧化技术的恒电流方式，在含有Na：SiO，和KF等电解质的溶液中制备了AZ91D镁合金微弧氧化层，通过扫描电镜观察分析及Cu加速盐雾腐蚀试验，研究了电解液中Na：SiO，和KF质量浓度对微弧氧化层结构及耐蚀性的影响。结果表明：在相同反应条件下，微弧氧化层厚度和表面粗糙度随Na：SiO，和KF质量浓度的增加而增加，微弧氧化层的耐蚀性取决于其表面粗糙度和厚度，粗糙度小、具有一定厚度的致密微弧氧化层耐蚀性好。Micro arc oxidation coatings are prepared in the surface of AZ91 D magnesium alloy by means of constant current mode of micro arc oxidation technology in the electrolyte solution containing NaESiO3 and KF. Effect of the concentration of Na2SiO3 and KF in electrolyte solution on structure and corrosion resistance of micro are oxidation coatings is studied by observation and analysis of SEM and test of salt fog corrosion accelerated by Cu. The results show that with the increasing of the concentration of Na2SiO3 and KF under the same technology condition, the thickness and roughness of the micro arc oxidation coatings increase and the corrosion resistance of micro arc oxidation coatings depends on its thickness and roughness. The corrosion resistance of compact micro arc oxidation coating is better with small roughness and fit thickness

关 键 词：镁合金 微弧氧化 耐蚀性 硅酸盐电解液 

分 类 号：TG166.4[金属学及工艺—热处理]