Zinc plate may show a lite brown depending on the bath. Passivation is a acid bath to remove machining oils etc. No rust preventation properties. ----- Original Message ----- From: Ken Patel <[log in to unmask]> To: <[log in to unmask]> Sent: Thursday, July 25, 2002 1:43 PM Subject: [TN] Sheet Metal Plating > Hello there, > We are seeing some sheet metals with problems like corrosion, finger > print and some kind of weird brown spot on them. we have specified > Bright Zinc Plating on them. I am interested in sending this to any > local lab fro analysis. > (1) Name of any lab where I send them for analysis, preferably local in > San Jose Bay Area. > (2) Should I change the plating spec? > (3) What is passivation? > > My vendor was suggesting Double Zinc Plating. Any help will be highly > appreciated. > > Re, > Ken Patel > > -------------------------------------------------------------------------- ------- > 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 ---------------------------------------------------------------------------------