Hi Genny - I would conduct a IPC JSTD-003 Test Method S assessment of the solderability. Dave Hillman Rockwell Collins [log in to unmask] Genny Gibbard <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 06/24/2009 11:16 AM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to Genny Gibbard <[log in to unmask]> To [log in to unmask] cc Subject [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 --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------