Yes. RA -- rosin active/activated The rosin itself is not a problem but the activators may leave significant amounts of halides, chlorides, etc. HCl is a common addition that makes a flux aggressive but then requires cleaning (CFCs work well). Regards, Brad Vanderhoof -----Original Message----- From: Ryan Chase [mailto:[log in to unmask]] Sent: Wednesday, April 14, 1999 4:25 PM To: [log in to unmask] Subject: [TN] Corrosion Has anyone heard of rosin based fluxes causing corrosion? It is on a connector with solder cup connections and the flux used is a RA flux. The pins and the solder is showing signs of corrosion. Could this be caused or accelerated by the flux? Any help is appreciated. Ryan ----------------------- Ryan Chase Manufacturing Engineer GE Harris 403-214-4502 Fax 403-287-3107 [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 ################################################################