Letter 37004

Copper contamination effect in 63%sn-37%pb solder for wave soldering [Iran] 

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I want to know about effects of 0.17%wt in tin63%-lead37% solder,when we use it in a double wave automatic soldering machine.

The situation ia as below: after analyzing of melted solder which is used in our wave soldering machine,we found,copper(cu) contaminant is higher than standard limit(BS and EWN). so,we want to know about the effects of such phenomena in soldering quality for electronic boards.(other physical elements like fe-BI-SB are lower than max limits).

FARHANG ETEZAD
SIMAVA CO. - IRAN

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