If I may suggest, contact David Hillman, Rockwell International, Cedar
Rapids, Iowa.  Internet address:  [log in to unmask]

Dave has had extensive experience with SERA technology, examining the
solderability of various finishes with time.  Dave also heads us the IPC
committees on J-STD-002 and 003, which deal with the solderability of
components and boards.

Doug Pauls aka [log in to unmask]
Contamination Studies Labs.