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  • 哪些原因容易导致镀镍层结合力差?
  • 本站编辑:杭州富阳裕红线材制品有限公司发布日期:2018-08-23 16:09 浏览次数:

单线厚镀锌钢丝设备

隐蔽的污物影响镀镍层的结合强度
Concealed dirt affects the bonding strength of nickel plated layer.
工件孔眼、缝隙中的污物在前处理时若未能清理干净,电镀时会分解出来,这一范围内镀层结合力是很差的,有时还可能当即鼓泡、脱落。
If the dirt in the hole and gap of the workpiece can not be cleaned up before pretreatment, it will be decomposed when electroplating. The adhesion of the coating in this range is very poor, and sometimes it may be immediately bubbling and falling off.
氰化镀铜层过薄影响镀镍层的结合强度
The influence of the thin copper plating layer on the bonding strength of nickel plating layer
有的铜镍铬工艺中先采取氰化镀铜再酸性光亮镀铜,如果氰化镀铜层过薄,酸性镀铜时容易出现“敷镀”,在此镀层上镀镍,镍层应力会把“敷镀”层一起从氰化镀铜表面拽下来。
In some copper-nickel-chromium plating processes, cyanide copper plating is adopted first and then acid bright copper plating is adopted. If cyanide copper plating is too thin, acidic copper plating is easy to occur "plating". Nickel plating on this coating, the nickel layer stress will pull the "plating" layer from the surface of cyanide copper plating together.
裸手接触工件影响镀镍层的结合强度
Bare hand contact with workpiece affects the bonding strength of nickel plated layer.
镀镍过程中有时因工件挂得不够正,如尖端、凸出部位朝向了阳极要及时予以纠正,但在纠正时切勿用裸手扳,否则必然会留下指印并暴皮。
In the process of nickel plating, sometimes the workpiece is not hanging correctly enough, such as the tip, protruding parts toward the anode should be corrected in time, but do not use a bare hand wrench when correcting, otherwise it will inevitably leave a fingerprint and skin.
解决方法:可用洁净的塑料或金属棒拨正
Solution: use clean plastic or metal rods to correct.
有机杂质污染影响镀镍层的结合强度
Influence of organic contamination on bonding strength of nickel plated layer
光亮镀镍溶液中有机杂质产生的原因主要是:使用的化工原料纯度低、光亮剂的分解和抛光膏的带入以及工件的前处理欠彻底、隐蔽部位藏有污物的带入。
The main causes of organic impurities in bright nickel plating solution are the low purity of chemical raw materials used, the decomposition of brighteners and the introduction of polishing paste, the incomplete pretreatment of workpieces and the entrance of dirt hidden in hidden parts.
解决方法:要定期进行净化处理
Solution: regular purification.
1、在搅拌下向溶液中加入双氧水1~3ml/l;
1. Add hydrogen peroxide 1~3ml/l to the solution under stirring.
2、将溶液加热到50~60℃
2. Heat the solution to 50~60 C.
3、在搅拌下加入粉末状活性炭2~3 g/l (如果加的是颗粒状的应加倍加入)
3. Add the powdered activated carbon 2~3 g/l to the agitation (if the addition is granular, it should be doubled).
4、继续搅拌2小时。
4, continue stirring for 2 hours.
5、静置2小时后过滤。
5, filter for 2 hours after standing.
6、添加适量添加剂后试镀。
6. Add proper amount of additives and test.