We are considering using PEMs on some future boards that we are building. We have heard concern about corrosion to the plastic parts when used with RMA flux. I have been under the impression that this is only a problem when the part is immersed in RMA flux as would happen in wave soldering for example. My question is if anyone has had experience with plastic parts and RMA flux and if immersion in RMA and then heating to trap the flux is the the only concern. Jason Witt Materials and Process Engineer Boeing Information, Space & Defense Systems Building DL22, Dept 624 Voice: (770) 497-5025 1800 Satellite Blvd FAX: (770) 497-5555 Duluth, GA 30097-4099 e-mail: [log in to unmask] ############################################################## TechNet Mail List 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 web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################