激光烧蚀铝合金表面对其胶接接头耐腐蚀性能的影响

中国机械工程

激光烧蚀铝合金表面对其胶接接头耐腐蚀性能的影响

朱传敏1,2;吕珊珊1,2;梅雨1,2;林建平1,2

1.同济大学机械与能源工程学院,上海,201804
2. 同济大学上海市地面交通工具空气动力与热环境模拟重点实验室,上海,201804

出版日期:2017-12-10 发布日期:2017-12-08
基金资助:
国家自然科学基金资助项目（51575397）
National Natural Science Foundation of China （No. 51575397）

Effects of Laser Ablation on Corrosion Resistance of Adhesive-bonded Aluminum Joint

ZHU Chuanmin1,2;LYU Shanshan1,2;MEI YU1,2;LIN Jianping1,2

1.School of Mechanical Engineering, Tongji University, Shanghai,201804
2.Tongji University Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Shanghai,201804

Online:2017-12-10 Published:2017-12-08
Supported by:
National Natural Science Foundation of China （No. 51575397）

摘要/Abstract

摘要： 采用激光对5052铝合金进行表面烧蚀处理,对其表面物化特性进行观察分析，并测试了其胶接接头在盐雾环境腐蚀后的剪切强度与失效模式。实验结果发现，经激光表面处理后，接头的剩余强度在盐雾环境腐蚀后强度增大了40%，并且失效模式由几乎完全界面失效变成内聚失效。经分析测量，处理后的铝合金表面粗糙度从0.09μm增大到1.77μm，并且在其表面形成了凹凸不平的多孔结构，胶接时发现胶粘剂渗入其中增强了胶接界面的粘接;同时，经过表面元素能谱分析，发现氧元素含量增加，铝合金表面生成氧化铝，也有利于增强铝合金基体的抗腐蚀性能，证明激光表面处理可以提高胶接接头的耐腐蚀性能。

关键词: 铝合金, 激光烧蚀, 胶接接头, 耐腐蚀性能

Abstract: Physicochemical properties of surfaces were analyzed after laser-treated for aluminum 5052. And lap-shear strength and failure mode of adhesive joints were tested under salt spray environments. The results show that the residual strength of adhesive-bonded laser ablated aluminum alloys increases by 40% after salt spray environments, and the failure mode transferres to cohesive failure from interfacial failure. The values of surface roughness are improved from 0.09μm to 1.17μm, and a concavo-convex porous structure formed by laser ablation. It shows that the adhesive may penetrate into the substrates so that the interface is enhanced. Also, more oxygen elements are found on the surfaces after laser ablation which may improve the corrosion resistance of aluminum substrates.

Key words: aluminum alloy, laser ablation, adhesive joint, corrosion resistance

中图分类号:

TG495

朱传敏1,2;吕珊珊1,2;梅雨1,2;林建平1,2. 激光烧蚀铝合金表面对其胶接接头耐腐蚀性能的影响[J]. 中国机械工程.

ZHU Chuanmin1,2;LYU Shanshan1,2;MEI YU1,2;LIN Jianping1,2. Effects of Laser Ablation on Corrosion Resistance of Adhesive-bonded Aluminum Joint[J]. China Mechanical Engineering.

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