Answers below Steven Hoffner wrote: > 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? It depends (sorry, Paul) > 2. What level of Cl, Br, SO, NO, Weak Organic Acid contaminants if > detected using Ion Chromatography would be low risk? It depends > 3. What are some tests, that can quantify risk, that can be made on > actual assemblies? Plug 'em in under the worst climatic conditions and test for smoke > 4. What tests are best to screen any potential infant mortality > failures? Don't let the infants put their fingers in the power socket holes > 5. What are the best ways to clean the No clean flux residues from > the assemblies? Sorry, forget it. If they are newly soldered, there may be a chance but your wording suggests that these are already existing devices (i.e., were soldered in the indeterminate past). As it is, you would probably cause a lot more harm than good. Brian > > 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 > ----------------------------------------------------- > --------------------------------------------------- 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 -----------------------------------------------------