电镀方式分为哪几种?

2025-03-15 00:24:39
推荐回答(1个)
回答(1):

1、电镀从原理分就一种:电镀
2、从镀层种类分:单金属镀层有锌、镉、铜、镍、铬、锡、银、金、铁、钴等十几种,合金镀层有铜-锡、锌-铜、锌-铁、镍-钴、镍-铁、锌-锡-铁、锡-锌-锑、锡-锌-钴等几十种,
3、按用途分:
防止腐蚀:如钢铁工件的镀锌、镀镉。
装饰性电镀:如钢铁工件的防护-装饰性镀层,一般采用铜-镍-铬或低锡青铜-铬等多层电镀。这在各种机械产品、仪器仪表、医疗器械和日用品上使用较为广泛。
提高表面硬度和耐磨性能:如模具镀硬铬。
提高工件的导电性能:如铜及铜合金的镀银或镀金。
提高导磁性能:如电镀镍-铁合金、镍-钴合金,镍-钴-合金等。
提高光的反射性能:如镀银、镀装饰性铬。
应用于热加工方面:如防止局部渗碳的镀铜,防止局部渗氮的镀锡等。
修复工件尺寸:如镀铁、镀铬。
其它用途:如镀铅可以提高耐硫酸或铬酸的性能,镀黄铜可以增加钢铁件和橡胶热压时的粘合性,铜及其合金镀锡可以改善其焊接性能等。

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