Doubtful. Tin whiskers only grow from pure tin.
If you were using pure tin, you would also be subject
to tin pest, which would be at least as bad a problem
in Japan, Korea, Europe, and the northern USA.
Lead-free solders are unlikely to be pure tin, although
they may be tin alloys (which are not subect to tin
whiskers or tin pest).
Pure tin might be used as a plating on leads and
circuit board lands, but these phenomena are well
known in the electronics industry. Only idiots would
get bitten by them, however that can't be entirely
ruled out. The Illiac-IV supercomputer was plagued
by unreliable connections caused by plating gold
directly over copper without a barrier layer. That
was also a well-known problem in the electronics
industry, but somehow idiots were allowed to
participate in the Illiac-IV hardware design.
The well-known whisker problem is more general than just tin. Zinc and
silver coatings also can grow whiskers.
Zinc whiskers (from electroplating on steel floor tiles for raised
floors) are a possible problem in data centers.
See the recent article at:
and of course also check the home page at:
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