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What is cyanide free alkali copper? Xinsida introduces it to you
Cyanide copper plating is mainly used as the pre copper plating layer on the finished steel products to avoid the replacement of the plating layer. It is also the bottom plating layer of other plating layers. Only when it is loose can it have good adhesion with the substrate. However, cyanide copper plating not only uses cyanide, but also needs heating, so people have been trying to develop products to replace it. Pyrophosphate copper plating is popular in foreign countries. It can be plated on the steel substrate with good bonding strength, and the crystal is finer than cyanide copper plating. Because its pH value is lower than cyanide copper plating, it is especially suitable for zinc, aluminum and other substrates.
目前国内和国外都有许多公司在研讨无氰镀铜，无氰镀铜工艺按配位剂主要有焦磷酸盐、多聚磷酸盐、柠檬酸盐、酒石酸盐、乙二胺、三乙醇胺系统以及混合配位剂系统等。
无氰镀铜尽管工艺很多，但归纳工艺性能与氰化物镀铜间的差距较大，尚不能彻底处理基体与铜镀层的结合力及镀液的老化问题。所以还需要广阔电镀工作者的尽力，提高。
This article is from:http://www.newstar-china.com/
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