钢丝热镀锌前必须进行一系列表面处理过程,使其表面达到光亮洁净。表面处理的好环直接影响钢丝镀锌的质量。钢丝在热镀锌中最常见的缺陷是“黑点”即露铁。产生“黑点”的主要原因是镀前处理不洁净,致使不能镀满而产生空点。随着快速拉丝的发展,对拉拔前的涂层和拉拔时的润滑剂要求越来越高。磷化膜涂 Galvanized steel wire must be carried out before a series of surface treatment process, so that the surface to achieve bright and clean. Good surface treatment of a direct impact on the quality of galvanized steel wire. The most common flaw in hot dip galvanizing of steel wire is “black spots” ie dew. The main reason for the “black spots” is that the pre-plating treatment is not clean, resulting in an empty spot that can not be plated. With the rapid development of wire drawing, the requirements for the coating before drawing and the lubricant for drawing are getting higher and higher. Phosphate coating