Steve,

Solder oxidizes more readily then tin but if there is no contact then as
they say "no harm no foul".

Is this electroplated, electroless, or immersion plated tin over nickel
(how thick is the tin)?

I would be more concerned with whiskers!

David A. Douthit
Manager
LoCan LLC

 -------------------------------

Steve Gregory wrote:

>Yes David, they are tin plated. See the following datasheet:
>
>_http://www.samtec.com/ftppub/pdf/PCT2.PDF_
>(http://www.samtec.com/ftppub/pdf/PCT2.PDF)
>
>I have a couple of questions:
>
>1. Is 63% tin and 37% lead so dissimilar that it would create conditions  for
>dissimilar metal corrosion?
>
>2. If the solder didn't flow up into the wiping area of the contact (from  my
>observations, it didn't) should we still replace the connector?
>
>Sorry to be beating a dead-horse to death, but I want truely want to
>understand why the rework that we did was so bad...I want to learn from this
>experience.
>
>-Steve Gregory-
>
>Steve,
>
>The only reason I can think of is that the mating pins  are also tin
>plated and a layer of solder would create dissimilar metal  corrosion.
>
>David A. Douthit
>Manager
>LoCan  LLC
>
>
>
>
>
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