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Author Topic: chromate conversion coating vs self etching primer for aluminum  (Read 1441 times)

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Offline coppercone2Topic starter

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chromate conversion coating vs self etching primer for aluminum
« on: April 16, 2020, 03:24:05 pm »
Are they compatible? I saw they sell various products for aircraft that you can chromate aluminum with, prior to painting.

However, if this is done, should self etching primer be used, or regular primer? Does the etching nature of self etching primer degrade the conversion coating?
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Offline eKretz

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Re: chromate conversion coating vs self etching primer for aluminum
« Reply #1 on: April 16, 2020, 06:36:38 pm »
I would think the etching primer would remove the dichromate coating. Stick to one or the other. You can also etch aluminum pretty well using phosphoric acid "clean and etch" type solutions.
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Offline coppercone2Topic starter

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Re: chromate conversion coating vs self etching primer for aluminum
« Reply #2 on: April 17, 2020, 02:39:25 am »
I was thinking of the Alodine coating.
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