---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Mon 11/23/09: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:49 AM - Re: Metal to Metal bonding (Gil Alexander) ________________________________ Message 1 _____________________________________ Time: 08:49:30 AM PST US From: Gil Alexander Subject: Re: TeamGrumman-List: Metal to Metal bonding Gary... I'm a bit confused about the need for an alodine bath. The MIL-Spec says... ------------------------ Chem Film, per MIL-C-5541, can be applied several ways. "Unless an application method is specified, the chemical conversion materials shall be applied nonelectrolytically by spray, brush, or immersion after all heat treatments and mechanical operations such as forming, perforating=85=85=85" This applies to touch ups as well, as long as the touch up area does not exceed 5% of the part surface area. Also, "The materials from one supplier shall not be mixed or used to strengthen an existing solution from another material supplier." ------------------------ http://www.everyspec.com/MIL-SPECS/MIL+SPECS+(MIL-C)/download.php?spec=MIL -C-5541E.002379.pdf DuPont's product sheet here.... http://www.blueridgepaint.com/pdfs/Aviation/AVA_13206S_TDS.pdf DuPont Aviation Finishes products approved for MIL specifications: MIL-C-5541 - Aluminum Conversion Coating DuPont=99 13206S=99 Aluminum Conversion Coating - (Alodine 1201) Why not just brush or spray the alodine solution on for the required 2 to 5 minutes of dwell time? gil A ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.