All, I have a few questions regarding the cleaning of no clean fluxes. First I know this is not recommended but I have a number of power supply assemblies (120/240V in, 3.3V out) that were poorly cleaned. 1. Are the Sn and Pb salts left on the board conductive on their own in a low humidity (less than 50%) environment? 2. What level of Cl, Br, SO, NO, Weak Organic Acid contaminants if detected using Ion Chromatography would be low risk? 3. What are some tests, that can quantify risk, that can be made on actual assemblies? 4. What tests are best to screen any potential infant mortality failures? 5. What are the best ways to clean the No clean flux residues from the assemblies? TIA, Steven Hoffner --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 -----------------------------------------------------