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一、前言钝化是钢材镀锌一项重要的后处理工艺,其主要作用是在锌层表面生成一层钝化膜,以增强耐蚀性。自镀锌钢材问世以来,锌层表面钝化技术,一直是镀锌技术的一个重要分支,并随着热镀锌和电镀锌两大类镀锌工艺及镀锌品种的发展而发展。目前,国际上在这方面的研究工作仍然相当活跃。其主攻方向是最大限度地提高耐蚀性,尤其是在作业线运行速度高、钝化时间短暂的情况下,力求获得高耐蚀性的钝化膜,同时兼顾表观装饰性等辅助性能。在使用较广的化学钝化类工艺中,由于附加剂具有增进耐蚀性的特
I. INTRODUCTION Passivation is an important post-treatment process of galvanized steel. Its main function is to generate a passivation film on the surface of zinc layer to enhance corrosion resistance. Galvanized steel since the advent of the zinc surface passivation technology, has been an important branch of galvanizing technology, and with the hot-dip galvanized and galvanized two types of galvanizing process and the development of galvanized varieties. At present, the international research work in this area is still quite active. Its main thrust is to maximize corrosion resistance. In particular, it aims to obtain a passivation film with high corrosion resistance with a high operation speed and a short passivation time, and at the same time assists with the auxiliary properties such as the decorative appearance. In the use of a wider range of chemical passivation process, due to additives to improve the corrosion resistance of the special