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采用磷酸电解质对铝合金板进行了阳极化处理并测试了其胶接性能,测试了阳极化过程中铝合金板的基本力学性能,观察了阳极化处理后的铝合金板的表面形貌,分析了阳极化处理后铝合金粘接副的胶接界面、拉伸剪切失效模式。结果表明,铝合金板经过酸洗、碱洗和阳极化等过程后,其破坏强度、屈服强度、弹性模量和断裂延伸率等力学性能基本保持不变。阳极化后铝合金板表面形成了一层凹凸不平、多孔结构氧化膜,胶接时胶黏剂能渗透进入该氧化膜,形成一层胶接过渡层,阳极化处理提高了铝合金粘接副之间的拉伸剪切强度,其拉伸剪切强度最大可提高1.76倍。阳极化处理后的铝合金板粘接副之间的破坏模式为混合破坏,即存在胶黏剂的剪切破坏,同时存在粘接界面的剥离破坏。
The phosphoric acid electrolyte was used to anodize the aluminum alloy plate and its adhesive properties were tested. The basic mechanical properties of the aluminum alloy plate during the anodization process were tested. The surface morphology of the anodized aluminum alloy plate was observed and analyzed. After the anodized aluminum bonding adhesive bonding interface, tensile shear failure mode. The results show that the mechanical properties such as breaking strength, yield strength, modulus of elasticity and elongation at break of the aluminum alloy plate remain the same after pickling, caustic washing and anodizing. After the anodized aluminum alloy plate surface formed a layer of uneven, porous structure of the oxide film, adhesive bonding agent can penetrate the oxide film to form a layer of adhesive transition layer, anodized aluminum alloy to improve adhesion Between the tensile shear strength, tensile shear strength up to 1.76 times. The failure mode between the anodized aluminum alloy plate bonding pairs is mixed failure, that is, the shear failure of the adhesive exists, and at the same time the peeling failure of the adhesive interface exists.