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topic 32658

Relative performance of various "Alodine" treatments for Aluminum


2004

I'm begining to build a kit plane that will include some riveted aluminum structures. I'm aware that most home-builders use "Alodine" to protect the internal structures from corrosion, and also use additional 2-part epoxy primers for more extreme conditions (float planes...). My question relates to the variety of "Alodine" solutions available. I have limited information on the following, but don't know how they perform relative to each other:

Alodine 1200S - contains hexavalent chrome (?) the benchmark?
Alodine 5200 - trivalent chrome ? Not as good?
NAVAIR TCP - trivalent as well?
Alodine 5700 (diluted 5200)
PPG 501 and 503 (tinted) - what are these?
Veriprime ?

Any source that pulls all this together?

Thanks

Russ Beers
Metallugical Engineer, but this is a new area for me...

Russell Beers
Aircraft hobbyist - Manchester, Connecticut, USA



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