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利用拉剪实验及楔子实验等测定2A14铝合金粘接件的结合强度和耐久性,结合扫描电镜及红外分析等方法,研究铝合金粘接前阳极氧化膜的微观结构及含水量对其粘接性能的影响。结果表明:铝合金磷酸阳极氧化膜经过冷风吹干、50℃烘干和100℃烘干处理后,粘接试样的拉剪强度随烘干温度升高略有增加;粘接试样的湿热耐久性以50℃烘干处理后的稍好,而100℃烘干处理后,由于氧化膜中产生大量微裂纹,使其耐久性有所下降;氧化膜经过沸水封闭处理后,由于膜中含水量很大及封孔处理限制了粘合剂的渗透,导致其拉剪强度和湿热耐久性皆明显降低。
The bonding strength and durability of 2A14 aluminum alloy bonding parts were measured by tensile shear test and wedge test. The microstructure and water content of anodized aluminum before bonding were studied by scanning electron microscopy and infrared analysis. The impact of performance. The results show that the tensile strength of the bonded samples increases slightly with the increase of drying temperature after cold air drying, drying at 50 ℃ and drying at 100 ℃. The hot and humid Durability after drying at 50 ℃ slightly better, and 100 ℃ drying treatment, due to a large number of micro-cracks in the oxide film, so that its durability has decreased; after the oxide film is closed by boiling water, the film containing Large amounts of water and sealing treatment limit the penetration of the adhesive, resulting in significantly lower tensile strength and damp heat durability.