Mercury will corrode aluminum at warp speed!! David A. Douthit Manager LoCan LLC Tim Reeves wrote: > I think it's not so much that it's pressurized, actually atmospheric pressure in a submarine is on the low side (I served on one from 1988-92) but that it's enclosed with a recirculated atmosphere. In a submarine, oxygen is replenished, CO2 is scrubbed out and CO and hydrocarbons are oxidized, but certain contaminants are harder to remove. > Mercury vaporizes enough to be a concern under standard conditions, and normally things vaporize more as the pressure is lowered. > But you're right that it's not too surprising to receive a request for mercury-free certification. > > Best Regards, > Timothy Reeves > Technical Service Engineer - Matsushita Electronic Materials, Inc. > 4114 Heather Street, Forest Grove, Oregon, 97116 > Main (503) 357-8695 Direct (503) 992-5109 Cell (503) 781-1495 Fax (503) 357-8868 > > -----Original Message----- > From: Quality [mailto:[log in to unmask]] > Sent: Thursday, March 20, 2003 1:40 PM > Subject: Re: Mercury Free Cert > > Mark, > > This is a fairly common request - especially for product that is > going into a pressurized vessel. (Submarines, airplanes etc.) > Seems mercury has a nasty habit of vaporizing under pressure. > > Anyway, we went through the effort a few years ago to assure no > mercury is used in any materials we use - there were none. What > you have to watch for is the use of things that contain mercury like > thermometers. > > pete > [log in to unmask] > > On 18 Mar 03, at 7:46, Mark Hargreaves wrote: > > > Hi All, > > Seems to be my month for receiving unusual certification requests from our > > bare board customers. > > > > Yesterday, a customer asked us to certify that our boards (or is it our > > processes?) are "mercury free". > > > > Before I start sifting through MSDS's, is anyone aware of any PCB materials > > (FR4), chemistries or processes that typically contain mercury? > > > > Are there any good info sources out there regarding mercury & PC fab? > > > > Many thanks for your responses to all of my past questions. > > > > Mark Hargreaves > > > > --------------------------------------------------- > > 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 > > ----------------------------------------------------- > > Peter Menuez > QA Manager > Proto Circuit, Inc. > 330-572-3400 > > --------------------------------------------------- > 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 > ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------