Hi recently I encounter problem in my production line. Have a tin plated jumper turning black during soldering. The appearance of the plating is normal (matte silver colour).
Please advise what could have happen and what can I do to continue use these jumpers.
Karen Seah QC Engineer - Singapore
August 8, 2010
It could be due to organic contamination of tin plating bath and cause excess carbon codeposit into tin deposit. Carbon content in tin deposit should not be more than 500 ppm. Recommend to do carbon polishing of tin plating bath when necessary.
David Shiu - Singapore
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