Galvanic Corrosion Solutions
Galvanic Corrosion Solutions
(OP)
I am designing Liquid Petroleum dividers and I am very worried about galvanic corrosion. The blocks will be made from Aluminum but the hose fittings will be brass. My first reaction was to anodize the aluminum but I already know I will be asked if we can avoid this to save a few bucks. I have looked at a few samples from other companies and none of their dividers are anodized and they are using brass fittings. This may be that they are fine putting out low quality where we will not.
My question is, Is there a thread sealant that will insulate enough to prevent galvanic corrosion? I feel like this would be impossible because while the sealant fills in the cracks the aluminum and brass threads will still be in contact. Hopefully someone smarter than me can let me know if I am way off base
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Thank you,
My question is, Is there a thread sealant that will insulate enough to prevent galvanic corrosion? I feel like this would be impossible because while the sealant fills in the cracks the aluminum and brass threads will still be in contact. Hopefully someone smarter than me can let me know if I am way off base

Thank you,
RE: Galvanic Corrosion Solutions
What will cause corrosion? Is there water in the system?
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P.E. Metallurgy, consulting work welcomed
RE: Galvanic Corrosion Solutions
I do not know the Brass alloy yet but have reached out to the manufacturer for that information.
There will be propane in the lines and these will be installed on RV's so they will be exposed to the elements and will even have snow and salt sprayed up on them while driving down the road.
RE: Galvanic Corrosion Solutions
For thread sealants, Loctite 545 is good for small diameter threads, 577 is good for all diameter threads. These are my go to sealants for petroleum applications. I don't know if you are expecting cryogenic temperature and I don't know if these sealants are acceptable for extreme low temperatures.
RE: Galvanic Corrosion Solutions
From what I know type 2 has plenty of corrosion resistance its just doesn't penetrate as deep and it doesn't harden the aluminum like type 3 does. I don't think either of those extra features are necessary here because they shouldn't see impacts or scratches that would compromise the type 2 anodizing.
I appreciate the suggestions for Loctite, 577 looks like it would be great for my application! These would have no effect at slowing down galvanic corrosion though correct?
RE: Galvanic Corrosion Solutions
The corrosion is often worse in these tight crevices.
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P.E. Metallurgy, consulting work welcomed
RE: Galvanic Corrosion Solutions
RE: Galvanic Corrosion Solutions
Thank you again.