2020-09-29
首先我们来了解下什么是电镀
电镀就是利用电解原理在某些金属表面上镀上一薄层其它金属或合金的过程，是利用电解作用使金属或其它材料制件的表面附着一层金属膜的工艺从而起到防止金属氧化（如锈蚀），提高耐磨性、导电性、反光性、抗腐蚀性（硫酸铜等）及增进美观等作用。
电镀中又分为镀铜、镀金、镀银、镀铬、镀镍和镀锌等具体工艺，在制造业领域尤其对镀锌、镀镍和镀铬应用最广。而这三者之间一定有什么区别的吧？
01-镀锌
定义：镀锌是指在金属、合金或者其它材料的表面镀一层锌以起美观、防锈等作用的表面处理技术。
特点：成本低，防腐蚀一般，颜色为银白色。
应用：螺丝钉、断路器、工业用品等。
02-镀镍
定义：通过电解或化学方法在金属或某些非金属上镀上一层镍的方法，称为镀镍。
特点：美观，可以做装饰，价格高，工艺略复杂，颜色为银白显黄色。
应用：节能灯灯头、硬币，五金件等。
03-镀铬
定义：铬是一种微带蓝色的亮白色金属，通过电解或化学方法在金属或某些非金属上镀上一层铬的方法，称为镀铬。
特点：镀铬有两种，第一种是起装饰作用，外表光亮、耐磨擦性能较好，防锈能力不如镀锌，优于氧化；第二种是增加金属零件的硬度、耐磨性等，这是零件的功能性。
应用：家电、电子等产品上的的光亮装饰件，工具，水龙头等。
至于三种电镀最基本的区别
1:”镀铬主要是提高表面硬度，美观，防锈。铬镀层具有良好的化学稳定性，在碱、硫化物、硝酸和大多数有机酸中均不发生作用，但能溶于氢卤酸(如盐酸)和热的硫酸中。 因铬不变色，使用时能长久保持其反射能力而优于银和镍。 工艺一般都是电镀。
2:镀镍主要是耐磨，防腐蚀，防锈，一般厚度较薄，工艺的话分电镀和化学两类。
3:镀锌主要是美观 防锈。zn是活泼金属，能与酸反应，所以耐腐蚀性较差,是三种中最便宜的。
成本方面的区别镀铬最贵,镍其次,锌最便宜,其中还要区分挂镀、滚镀等.挂镀贵,滚镀便宜
还有小伙伴说
不还是一样傻傻分不清楚
那么小编只能告诉你
下面
那就通过颜色来区分吧
镀铬亮白色，镀镍有一点发黄，镀锌银白色（其实还有彩锌，灰锌，亚光铬，亮光铬，白镍，黑镍等等，说的越多更是傻傻分不清楚）这三种是最常见的
扩展知识：
1-电镀生产主要以污水和污水中重金属污染为主，国家已严厉控制电镀行业的扩张，并且逐年削减。
2-我国电镀加工主要是镀锌、镀铜、镀镍、镀铬，其中镀锌占50%，镀铜、铬、镍占30%。
3-如果用途是防止生锈，则可采用镀锌或镀镉；如果重点是为了防止磨损，镀镍或镀铬则是最佳选择。
电镀是一门很深的学问
并不是一句两句能说的清楚的
而且每种材料的镀法都不一样
电镀前处理，电解液配方，电流大小，电镀时间等等
各个细节都会导致电镀质量变化
抛开其他不说
电流小一点，电镀时间长一些
这样镀出来的产品质量越好
有点小火慢熬的意思
当然成本也是直线上升
最后再说一下
铬，你们是怎么读的
小编知道的是
行业里一般都读luo
实际上读ge
不知我说的对不对
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