hi, there is an 'ask the expert' hot link at the aluminum association that should answer you question. http://www.aluminum.org/ phil -----Original Message----- From: Gaugler, Kevin [mailto:[log in to unmask]] Sent: Wednesday, April 30, 2003 6:59 AM To: [log in to unmask] Subject: [TN] Aluminum and Halogenated Fluorocarbons Happy Hump-day Techies, Sorry this is not really a PCB assembly question but I know someone out there will have some insight on this topic. What is the mechanism behind the violent reaction between aluminum and halogenated fluorocarbons? Does the reaction occur spontaneously at room temperature? What conditions are required for the reaction to occur (pressure, temperature, etc?) Any insight would be appreciated. Kevin Gaugler R&D Manager Solder Paste Operations EFD, Inc. www.efdsolder.com < mailto:[log in to unmask]> phone: (401) 333-3800 x2221 fax: (401) 333-4954 --------------------------------------------------- Technet Mail List provided as a free 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/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 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------