镀层的粘附性是评价镀锌板质量的一项重要指标。该性能的好坏取决于镀锌时锌液与铁反应生成的合金层的结构。粘附性差的镀锌板,加工时镀层容易剥落,从而会降低它的防腐蚀能力。因而对合金层结构以及影响它的因素进行深入的研究是十分必要的。研究镀锌板合金层的传统方法是金相法,通过它已经获得了不少有用的知识。但是金相显微镜受到放大倍数的限制以及制样比较困难,要对合金层进行深入的研究有一定的局限性。自扫描电镜问世以来,它具有放大倍数高、景深大和制样简单等优点,显 Coating adhesion is to evaluate the quality of galvanized sheet is an important indicator. The performance is good or bad depends on the structure of the alloy layer formed by the reaction between zinc solution and iron during galvanizing. Poor adhesion of galvanized sheet, coating easy to peel off the process, which will reduce its anti-corrosion ability. Therefore, the alloy layer structure and the factors that affect it in-depth study is very necessary. The traditional method of studying the galvanized sheet alloy layer is the metallographic method, through which it has gained a lot of useful knowledge. However, the magnification of metallographic microscope is limited and sample preparation is more difficult. Therefore, in-depth study on the alloy layer has some limitations. Since the advent of scanning electron microscopy, it has the advantages of high magnification, large depth of field and sample preparation, was significantly