Hi Genny - I would conduct a IPC JSTD-003 Test Method S assessment of the 
solderability.

Dave Hillman
Rockwell Collins 
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Genny Gibbard <[log in to unmask]> 
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06/24/2009 11:16 AM
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[TN] Immersion Tin solderability eval






We have some Immersion Tin boards that are several years old.  From
everything I have read here or elsewhere, ImmSn is supposed to have a
short shelf life.  6 mos to a year.  No one wants to scrap the boards
without testing them, though. 
How would you verify whether they are still good?  We hand-soldered some
pads and actually had no problems which surprised me, considering the
age of the boards, but I don't know if that is a valid test.

Genny 

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