用于汽车车身镀锌钢板的修饰涂层性能研究-----外文翻译.doc

Performance of finish coated galvanized steel sheets
for automotive bodies
Abstract High performance and cost reduction are principal concerns for vehicle manufacturers. In addition to shape, the exterior finish is the first thing a consumer sees when looking at a vehicle. The quality and durability of the finish is a reflection of the quality and durability of the vehicle itself. In this work, the behavior of two finish coat systems was studied. Finish coat system 1 included a powder coat, a waterborne base coat and a clear coat, and finish coat system 2 included the same powder coat, a solvent-based base coat and a clear coat. These finish coats were applied on unprimed and pre-primed electrogalvanized, hot dip galvanized and galvannealed steel. Before application, for each finish coat two activation treatments were considered: a conventional zinc phosphate for automotive industry and an experimental pretreatment. Three primers were considered. Primer 1 is an organic zinc rich silicate with a low thickness (near 4 um), primer 2 is a very thin (near 2 um) water-based primer filled with graphite and primer 3 is a conventional electrophoretic applied primer system.
用于汽车车身镀锌钢板的修饰涂层性能研究

摘要 高性能和低成本是汽车制造商主要关心的问题。然而，消费者见到一辆车时第一印象的好坏便取决与汽车的形状和涂层外观。表面涂层的质量和耐用性是汽车自身质量和耐用性的直观反映。在这个研究中，实验对两种不同修饰涂层方法的性能进行了考察。修饰涂层方法1，它包括粉末敷涂、水性漆打底和表面的净化处理。修饰涂层方法2，它包括与方法1相同的粉末敷涂、用溶解能力强的漆打底以及干净的表面。这些修饰涂层被应用到未涂底漆和已涂底漆的锌电镀、热镀电镀以及镀锌扩散处理的钢铁。钢材涂装处理前，需要考虑对修饰涂层的活化处理，其中主要的两种活化处理包括：汽车行业传统磷酸锌的处理和经验性预处理。同时，对于修饰涂层的底漆研究了三种：底漆1是一种低厚度（大约4μm），富含硅酸盐的有机锌；底漆2是一种非常薄（大约2μm）富含石墨的水基底漆；底漆3是底漆传统电泳的方法。
为了对修饰涂层进行评价，样品需要进行循环腐蚀试验测定。然后对循环腐蚀试验所得数据进行正交检测，进而对涂漆的粘附力进行评估。