What you are seeing is probably not oxidation but sulfidation. Trace quantities of SO2 or H2S in the air will cause this. Other than the aesthetic view, light sulfidation is harmless and reasonable flux activity should be sufficient to handle it. The best way of prevention is controlled atmosphere storage. Brian "Karnwal, Pankaj" wrote: > > Dear all > > hello > > We are facing a problem that the leads of components getting > tarnished(oxidized) in store only those which are the silver plated like BNC > connectors , bridge rectifiers, LED's etc. all are through hole type. The > humidity Laval varies 43 to 47 % .Is this is sufficient, Pls. suggest the > special storage for these components .Is this problem comes by defaults ? > and any method about the oxidized once re - using ?. Thanks in advance for > your any response. > > With regards > Pankaj Karnwal > Quality Assurance > BESL NOIDA > PH .91-120-4420394-5 EXTN.211 > e mail : <mailto:[log in to unmask]> > Barco, innovators in image processing > > --------------------------------------------------------------------------------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8d > 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL > 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/html/forum.htm for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------