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August 28, 2006
Tinning no lead soldered wires with leaded solder
Regarding solder joint reliability - is it ok to use leaded solder to solder wires that have been previously tinned with no lead solder?
Mike Whatman
Smiths Medical
This "Ask the Experts" page has been viewed 931 times.
Ask the Experts Comments
August 28, 2006
Provided the tinning is thin and uniform this practice is acceptable. The key in lead to lead-free assembly is to eliminate any segregation of the lead in the joint. This segregation is what causes failures. This practice of tin lead onto lead free will not result in lead segregation since there is more than ample lead in the final solder joint.
Karl Seelig, Vice President of Technology
AIM
kseelig@aimsolder.com
In his 25 years of industry experience, Mr. Seelig has authored over 30 published articles on topics including lead-free assembly, no-clean technology, and process optimization. Karl holds numerous patents, including four for lead-free solder alloys, and was a key developer of no-clean technology.
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