az_gila
Joined: 17 Jun 2006
Posts: 99
Location: Tucson, AZ
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 Posted: Mon Nov 23, 2009 8:49 am Post subject: Metal to Metal bonding |
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Gary... I'm a bit confused about the need for an alodine bath.
The MIL-Spec says...
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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………" 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."
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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
[/b] DuPont™ 13206S™ 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 [quote][b]
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