文档介绍：钢铁件上镀锌工艺流程徐万飞 C01014068 (安徽大学化学化工学院 10化学) 摘要: 钢铁在空气、水或土壤中很容易生锈, 甚至完全损坏, 每年因腐蚀造成的钢铁损失约占整个钢铁产量的 25%~30% ,另一方面,为使钢铁制品与零件表面具有某种特殊功能,同时赋予其表面装饰性的外观, 所以一般采用电镀锌的方式对其处理。镀锌工艺主要包括表面整平、水洗、除油、浸蚀、电镀等步骤,本文对整个工艺流程做了详细的介绍。关键字: 整平;水洗;除油;浸蚀;电镀 Process of galvanization on the surface of steel Xu Wanfei C01014068 ( School of Chemistry and Chemical Engineering, Anhui University ,10 chemistry) Abstract :S teel is easy tobe corroded when exposed to the air, water or soil, pletely damaged. Every year due to corrosion of the steel loss about to in the whole of steel production by25% ~ 30%, on the other hand, in order to make the iron and steel products and parts surface has a special function, at the same time gives its surface decorative appearance, so, generally USES electric galvanized way for its treatment. Galvanized process mainly includes surface leveling, water, oil removal, etching, electroplating and other steps, in this paper, the whole process are described in detail. Keywords: flattening ;w ashing ; deoiling ;e rosion 引言全世界每年因金属腐蚀造成的直接经济损失约达 7000 亿美元,是地震、水灾、台风等自然灾害造成损失的总和的 6倍。这还不包括由于腐蚀导致的停工, 减产和爆炸等造成的间接损失。金属腐蚀的主要害处,不仅在于金属本身的损失, 更严重的是金属制品结构损坏所造成的损失比金属本身要大到无法估量。腐蚀是钢铁的致命弱点,钢铁因腐蚀而报废的数量约占钢铁当年产量的 25% —30% ,造成了巨大的资源浪费。因此提高钢铁的耐腐蚀性能非常重要。目前,电镀是人们常用的提高钢铁耐腐蚀性的方法,即在钢铁表面镀上一层比其活泼的金属。锌因其资源丰富,价格低廉,且可以很好地保护钢铁而受到亲睐。当钢铁发生腐蚀时,锌镀层因其活泼性大于钢铁而作为阳极而溶解,这样基体就不会受到腐蚀。除此之外,锌镀层还可钝化处理,其钝化后能够生成一层紧密细致的钝化膜,从而有效地防止钢铁与外界的接触,使其免