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Old August 15th, 2012, 11:46 AM
sonoronos's Avatar
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For those of you who have passivated your body panels prior to paint to avoid the poor adhesion problem:

I am trying to avoid using Alodine's 12xx series because of the hexavalent chrome and hydrofluoric acid components. Even though it's cheap, I don't want to die.

One alternative is chromium hydroxide sulphate in T5900 (trivalent chrome) -$215 a pail (which I believe is 5 gallons, more than enough for one truck). Still, this stuff is corrosive, although not nearly as dangerous as 1200.

According to AFRL/MLSSO, preferred non-chrome treatments are:

Pantheon PreKote, AC Technology BoeGel EP-II/AC-131, or Alodine 5200. These are basic metal salt passivation solutions (titanium, zinc, etc.)

All of these are followed by Akzo Sicopoxy 577-630 primer and then topcoat. specs are MIL-PRF-85582 or MIL-PRF-23377 (basically, just epoxy primer.)

Does anyone have experience here passivating their body panels prior to prime?

Granted, I know we are not painting fighter aircraft, but still...I've seen a couple of paintjobs already where people dent a body panel and a whole sheet of paint comes off...

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Old August 15th, 2012, 12:20 PM
evilfij's Avatar
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I used some sort of acid etch (muric it has been so long I forgot) and then used self etching primer.
*not legal advice*
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