Silicone grease migrating onto an existing solder joint may render the joint difficult or impossible to resolder during a rework operation. The grease may also migrate from the PWA to containers, bags, and/or work surfaces which in turn may affect material coming in contact with those items. Al Cash > ---------- > From: Dave Thomas[SMTP:[log in to unmask]] > Reply To: TechNet E-Mail Forum.;Dave Thomas > Sent: Friday, July 31, 1998 6:01 AM > To: [log in to unmask] > Subject: [TN] Silicone grease around soldered joints! > > People > > I am looking for some assistance in justifying the non-use of silicone > grease, ie Dow Corning 304, near soldered joints. > > Could someone please supply me with a route to suitable > documentation/reports to support this? > > I understand that if silicone grease should get on a joint prior to > soldering, there is a very good chance thatthe soldering process will > be > faulty. I am not so clear as to long term effects of silicone grease > maybe > migrating into soldered joints causing degredation and failure in > service. > > The manufacturing site I am currently working with are unhappy about > having > silicone grease in their factory so I am having to find suitable > alternatives. The difficulty is that my engineers are more than happy > with > silicone, but do not have to worry about long term effects. > > Your help would be appreciated. > > > Regards > > Dave Thomas > > Nothing will ever be attempted, if all possible objections must > first be overcome. > > -- Samuel Johnson, "Rasselas", 1759 > > =============================================================== > Dave Thomas Nortel plc > Principal NPI Engineer, London Road > European Radio Harlow > Essex > Telephone: +44 1279 402901 CM17 9NA > Facsimile: +44 1279 402100 UK > ESN: 742-2901 > E-mail: [log in to unmask] > =============================================================== > > ################################################################ > TechNet E-Mail Forum provided as a free service by IPC using LISTSERV > 1.8c > ################################################################ > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in the body: > To subscribe: SUBSCRIBE TechNet <your full name> > To unsubscribe: SIGNOFF TechNet > ################################################################ > Please visit IPC's web site (http://www.ipc.org) "On-Line Services" > section for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] or > 847-509-9700 ext.312 > ################################################################ > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################