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Solving the problem of falling off of sulphate copper plating coating
浏览: 发布日期:2019-05-13
A customer mentioned the bonding strength test between acid copper coating and nickel coating. Some products failed the test, resulting in a large number of products can not be produced. In view of the customer's problems, our staff went to the scene for practical analysis, as follows.
 
Process problem analysis:
 
1. There is still a problem of non-hydrophilicity after activation of double-throw and double-plating products.
 
2. There is burning problem in the high area of acid copper plating solution product. After activated carbon treatment last night for 4 hours, the test piece is semi-bright. Activated carbon treatment is done again this afternoon. After 2 hours, the test piece has only a certain brightness in the high area.
 
3. In the morning, the sample analyzed the acid copper plating solution and tested the temperature of the plating solution. The temperature has reached 32 C without using, which is far higher than the process requirement. There are problems of excessive decomposition of light agent and the influence of impurities.
 
4. On the spot inspection on July 15, there are many faults of ultrasonic vibration plate, which need to be repaired or replaced.
产品试验情况:
  试验方法 数量 结果 试验分析
1 7/13吸碳处理4H 12 2只起小泡 吸碳处理相对于以前好
2 7/14再吸碳4H 6 Ok 电镀酸铜直接镀镍铬,未抛光
50 8只1只起小泡 吸碳处理有好转
3 以前抛光50件,先试验6只,再试验20只 6 Ok 在铜合金线除油,然后到锌合金线电镀酸铜,可能搬运中间出现问题,个别出现问题
24 4只不合格,其中1只起到底层
4 以前电镀酸铜,6只立即电镀,12只存放2天再电镀 6 2只起泡 镀酸铜产品抛光后存放时间愈长,除蜡/除油俞难以处理干净
12 8只起泡
5 在锌合金电镀线镀酸铜   相对于铜合金好 酸铜槽镀液本身问题的影响还是比较明显
6 7/16手动先镀酸铜 20 Ok  
Fault handling measures:
 
1. Maintain all the fault equipment of pre-treatment degreasing to normal;
 
2. Copper plating bath was treated with 2g/L activated carbon.
 
3. Install a freezer in the acid copper plating bath to control the plating bath temperature between 24 and 28 degrees Celsius.
 
After the adjustment of the above scheme, the customer's problems have been solved.