Good morning Hetal, There are ways to remove the corrosion you can see, but what about the corrosion you cannot see, such as under parts. Do you have any photos you can share, perhaps on Mr. Gregory's site? And what conformal coating are you using? Doug Pauls Hetal Shah <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 03/22/2011 10:00 AM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to Hetal Shah <[log in to unmask]> To [log in to unmask] cc Subject [TN] how to remove corrosion from PCB Hello, We have been using the acrylic coating and it is failing. My application is a small, expensive copper/solder circuit board which must operate exposed in a greenhouse environment with humidity up to at least 80 per cent and temperature from about 55 to 85 deg F. There is evidence of green corrosion products and peeling conformal coating which presumably need a more appropriate coating. We have to do rework and use agin same pcb boards. We would be very grateful If anyone can be advised how to remove corrosion from the board. thanks Hetal Shah MG Chemicals ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/ContentPage.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/ContentPage.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------