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Xinsida interprets the common adverse phenomena of cyanide alkali copper, which needs attention
1、 Slow deposition speed and poor deep plating ability
1.先查看电流密度的巨细
2.再看阳极是不是钝化，游离NaCN是不是正常
3.溶液是不是被Cr6+污染。
二、镀层有针孔
1.先看基材外表是不是存在粗糙度较大。
2.查看前处理是不是妥当，是不是按要求做到“四无”规范（无油，无锈，无挂灰，无氧化膜）
3.Cu低或游离NaCN过高，镀液析氢较大，剖析镀液成分，调整镀液份额。
4.阴极电流密度大。
5.阳极面积较小。
三、镀层粗糙，色泽暗红
1.色泽暗红，标明阳极也许钝化和镀液中杂质增多，应取出阳极，调查其外表的色彩，并调查阳极邻近溶液是不是发蓝等
A)若阳极外表呈灰白色，则标明镀液中CO32-过高，有也许CN-分化过快。
B)若阳极外表呈黑色膜层，则标明是金属杂质的污染，应该用Na2S和活性炭处理.
2.镀层粗糙，标明镀液Cu+高，游离NaCN缺乏，应剖析化验，调整CuCN，游离NaCN在规范技术范围内。
总之，电镀毛病千变万化，需求咱们平常在工作中多留意调查，多做试验，以验证准确与否。
This article is from:http://www.newstar-china.com/
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