电解液浓度对镁合金AZ91D阳极氧化表面改性影响的研究  

Study on the effect of electrolyte concentrations on anodizing for magnesium alloy AZ91D

作　　者：张永君[1] 廖景娱[1] 段红萍[2] 严川伟[2] 

机构地区：[1]华南理工大学工业装备与控制工程学院腐蚀防护与表面工程研究所,广东广州510640 [2]中国科学院金属研究所腐蚀与防护国家重点实验室,辽宁沈阳110016

出　　处：《广东有色金属学报》2004年第1期40-43,共4页Journal of Guangdong Non-Ferrous Metals

基　　金：华南理工大学自然科学基金(110-E5040270)

摘　　要：固定电解液组分及影响镁阳极氧化成膜过程和膜层性能的其它因素,利用恒电流阳极氧化成膜技术以及电化学动电位极化测试技术,考察电解液浓度对镁合金AZ91D阳极氧化成膜效果的影响。结果表明,电解液浓度对镁阳极氧化有着十分重要的影响。电解液浓度不同,镁阳极氧化时火花放电现象、槽电压行为不同,膜层平均生长速率及其所表现出的腐蚀防护性能也不同。电解液浓度对镁合金阳极氧化的影响,可以归因于其对阳极氧化膜层结构及厚度的影响。While all the other factors, including the constituents of electrolyteic solutions, which has effects on the formation of anodic films and their properties are fixed, the effect of electrolyte concentrations on anodizing for magnesium alloy AZ91D is investigated using the techniques of constant current density anodizing and potentiodynamic polarization test. As a result, it is found that electrolyte concentration has a very important effect on the courses and results of anodizing. If different electrolyte concentrations are chosen, both spark discharge phenomena and bath voltage behaviors are different during anodizing. Furthermore, the average growth rates of anodic films and the corrosion protections provided by them are different. The effect of electrolyte concentrations on anodizing for magnesium alloy should be attributed to their effect on the structures and thickness of anodic films.

关 键 词：镁合金 阳极氧化 电解液浓度 表面改性 

分 类 号：TG174.451[金属学及工艺—金属表面处理]