以α-氰基丙烯酸酯类瞬干胶为胶粘剂, 采用剪切试验、接触角试验和扫描电镜观察系统研究了丙酮简单清洗、喷砂处理、阳极氧化处理以及偶联剂处理对5083铝合金板胶接接头剪切强度的影响。结果表明:经简单清洗后, 所得胶接接头的剪切强度最低; 在附着力和机械啮合的共同作用下, 喷砂处理和阳极氧化处理胶接接头的强度得到了提高, 其中阳极氧化处理的效果最为明显, 与简单清洗胶接接头相比,剪切强度提高了223.1%; 胶接前适当使用偶联剂可以使简单清洗和喷砂处理胶接接头的剪切强度提高, 在该试验条件下, KH-550偶联剂体积分数为5%时, 胶接接头的剪切强度均达到了最大值; 但偶联剂使阳极氧化处理形成的纳米小孔不能发挥机械啮合作用,所得胶接接头的剪切强度相比未使用偶联剂的反而降低。

Using α-cyanoacrylate as adhesive, the effect of surface treatments such as simple cleaning, sand blasting, anodic oxidation and coupling agent treatment on adhesion strength of 5083 aluminium alloy plates was studied by shearing test, contact angle test and SEM observation. The results indicate that through simple cleaning, the shear strength of the adhesive joints was the lowest. With the combined function of adhesive force and mechanical meshing, the shear strength of the adhesive joints which pretreated by sand blasting and anodic oxidation was increased, the effect of anodic oxidation treatment was the most obvious, and the shear strength of joints pretreated by anodic oxidation increased 223.1% than that of joints pretreated by simple cleaning. Proper using of coupling agent before adhesion resulted in the improvement of shear strength of joints pretreated by simple cleaning and sand blasting. Under this test condition, the proper volume fraction of KH-550 coupling agent was 5%, and bonding with which the shear strength of the joints got to the highest values. However, the shear strength of joints pretreated by anodic oxidation was decreased, because the coupling agent made the mechanical meshing effect of the nano holes formed during anodic oxidation process ineffective.