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查找电镀故障起源的几种实用方法

更新时间:2018-2-2 来源:电刷镀 标签:

中国电镀网讯:【前言】电镀过程通常由镀前处理、电镀和镀后处理组成。其中的电镀,有时包括镀铜镀镍镀铬(杂色)或预镀铜(或镍)→镀铜→镀镍→镀多层镍→镀铬等多道工序。在多工序的工艺流程中,电镀出了异常故障,首先要确定故障起源于哪一工序,确定故障的起源,通常可通过:跳越试验、对比试验和改变零件装挂位置试验来正确快速找到问题关健。

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改变装挂位置以后进行镀铬,故障现象不是出现在最外面一排,而是出现在第2排或第5排的零件上。说明故障起源于镀铬以前,与镀铬液无关。经过多种方法试验,最后找出来是光亮镍镀好以后出槽时,一个挂具产品还在电镀,这一挂具出槽时,靠近电镀挂具的出槽零件表面产生了双性电极异常而造成的。可见,这一起故障,若不用改变零件装挂位置进行试验,故障的起因很难找到。

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