磷酸–硫酸阳极氧化对铝合金表面粘接性能的影响  

Effect of phosphoric-sulfuric acid anodic oxidation on adhesive property of aluminum alloy surface

作　　者：黄燕滨[1] 仲流石[1] 

机构地区：[1]装甲兵工程学院装备再制造工程系,北京100072

出　　处：《电镀与涂饰》2013年第1期32-36,共5页Electroplating & Finishing

基　　金：军队科研计划项目

摘　　要：研究了磷酸–硫酸阳极氧化对铝合金2A50表面粘接性能的影响,并与喷砂处理进行比较。阳极氧化液组成与工艺条件为:磷酸70g/L,硫酸50g/L,草酸7g/L,甘油20g/L,温度(22±2)℃,电压20V,时间35min。采用扫描电镜观察经阳极氧化处理和经喷砂处理的铝合金表面、粘接界面、破坏界面的微观形貌,利用能谱仪分析阳极氧化膜的组成。结果表明,磷酸–硫酸阳极氧化可明显提高铝合金粘接副的拉伸剪切强度和粘接耐久性能。分析了磷酸–硫酸阳极氧化的成膜特点及电解液主要成分的作用,解释了阳极氧化处理后铝合金的粘接性能优于喷砂处理的原因。The effect of phosphoric-sulfuric acid anodic oxidation on adhesive property of the surface of aluminum alloy 2A50 was studied and compared with sand blast. The composition of anodic oxidation bath and process conditions are as follows： phosphoric acid 70 g/L, sulfuric acid 50 g/L, oxalic acid 7 g/L, glycerin 20 g/L, temperature （22 ± 2） ℃, voltage 20 V, and time 35 min. The micromorphology of aluminum alloy surface treated by anodic oxidation or sand blast, the bonding interface, and the destructed interface were observed by scanning electron microscope. The composition of anodic oxidation film was analyzed by energy-dispersive spectroscopy. The results show that phosphoric-sulfuric acid anodic oxidation can significantly improve the tensile-shear strength and adhesive durability of aluminum adherents. The film-forming characteristics and the roles of main components in the electrolyte during the phosphoric-sulfuric acid anodic oxidation process were analyzed. The reason why the adhesive property of aluminum alloy treated by anodic oxidation is better than that by sand blast treatment is explained.

关 键 词：铝合金 阳极氧化 磷酸 硫酸 喷砂 粘接性能 

分 类 号：TG174.451[金属学及工艺—金属表面处理]