铝合金电磁铆接接头耐腐蚀特性研究

Research on Corrosion Characteristics of Electromagnetic Riveted Joints for Aluminum Alloy Structures

摘要: 本文探究了ZL114A铸铝电磁铆接结构在盐雾环境下的力学性能和微观结构演化。对电磁铆接接头在不同腐蚀时间后的剪切和疲劳性能、微观结构和重量进行了分析。结果表明，电磁铆接接头的剪切和疲劳性能都是随着腐蚀时间的增加而逐渐下降，电磁铆接试件重量随着腐蚀时间先增加后减小。结合微观观察结果分析，腐蚀一周后，板与板之间存在大量腐蚀产物，并且表面氧化层还未脱落，试件重量增加。腐蚀二周后，局部的氧化层开始脱落，并且有大量腐蚀坑产生，导致重量开始下降。腐蚀三、四周后，试件受到腐蚀更严重，腐蚀坑越来越大，氧化层大面积脱落，试件重量进一步下降。总的来说，通过本文研究，深入了解了电磁铆接接头的耐腐蚀性，有利于推动电磁铆接技术的工程应用。

Abstract: The mechanical properties and microstructure evolution of ZL114A cast aluminum electromagnetic riveted joints in salt spray environment were investigated. The shear and fatigue properties, microstructure and weight of electromagnetic riveted joints after different corrosion time were analyzed. The results showed that with the increase of corrosion time, the shear and fatigue prop-erties of the electromagnetic riveted joints decreased, and the weight of the specimen increased first and then decreased. Combined with the microscopic observation, many corrosion products existed between the plates after one week of corrosion, and the surface oxidation layer was not removed, resulting in an increase in specimen weight. After two weeks of corrosion, the local oxide layer began to peel off and many corrosion pits were formed, resulting in the weight loss. After three or four weeks of corrosion, the specimen suffered more serious corrosion. The corrosion pit became larger, and the oxide layer fell off in a large area, and the weight of the specimen further decreased. In general, this study was expected to in-depth understand the corrosion characteristics of electromagnetic riveted joint, which was conducive to promoting the engineering application of electromagnetic riveting technology.