电解液浓度对镁合金阳极氧化膜层硬度的影响  

Effect of Electrolyte Concentrations on Anode Film's Hardness for Magnesium Alloy

作　　者：陈昌华[1] 刘晓烈[1] 孙立喜[1] 潘辉[1] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《西华大学学报（自然科学版）》2008年第2期86-88,共3页Journal of Xihua University:Natural Science Edition

基　　金：四川省科技厅应用基础研究项目(No.ZGY029-012)

摘　　要：在由氨水、有机胺、Na2SiO3、Na2B4O7和添加剂组成的电解液中,以恒电流方式对AZ91D镁合金进行阳极氧化处理,并研究了电解液各组分浓度对AZ91D镁合金阳极氧化膜层硬度的影响规律。结果表明,电解液各组分浓度对膜层硬度有不同程度的影响:有机胺具有抑制火花放电、提高膜层硬度和降低膜层粗糙度的作用;Na2SiO3是提高膜层硬度的主要成分;氨水、Na2B4O7和添加剂对膜层硬度的影响较小。在该电解液体系下可以在镁合金表面沉积一层组织致密、显微硬度达400～500HV的氧化膜。The effect of electrolyte concentrations on anodizing film’s hardness for AZ91D magnesium alloy is investigated using the techniques of constant current density anodizing in the electrolyte containing ammonia,organic amine, Na2SiO3, Na2B4O7 and additive. The results show that electrolyte concentration has different effect. Organic amine can restrain sparking, increase the hardness and improve the appearance roughness of oxide film. Na2SiO3 is the main composition for increase in the hardness of oxidefilm. The effect of ammonia,Na2B4O7 and additive is small to the hardness. Under this electrolyte system, a compact oxidation film, which has high hardness of 400～500HV,can deposit on the surface of magnesium alloys.

关 键 词：电解液浓度 镁合金 阳极氧化 硬度 

分 类 号：TG146.2[一般工业技术—材料科学与工程]