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'[Tech] Will a Aluminium and Brass junction corrode'
2009\06\15@185556 by AGSCalabrese

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I am trying to learn what metals will be safe when mated with aluminium.

Gus

2009\06\15@202305 by Vitaliy

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AGSCalabrese wrote:
>I am trying to learn what metals will be safe when mated with aluminium.

Maybe this would be helpful?

http://www.wbdg.org/ccb/FEDMIL/std889b.pdf

Brass does not look like a good match for aluminium.

Vitaliy

2009\06\15@202633 by Vitaliy

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AGSCalabrese wrote:
>I am trying to learn what metals will be safe when mated with aluminium.

An interesting paragraph from the MIL spec quoted earlier:

"A small anodic area relative to the cathodic area should be avoided. The
same metal or more noble (cathodic) metals should be utilized for small
fasteners, and bolts. The larger is the relative anode area, the lower the
galvanic current density on the anode, the lesser the attack. The galvanic
corrosion effect may be considered as inverse to the anode-cathode area
ratio."

They also describe the methods you can use to protect "metals widely
separated in the galvanic series".

Actually seems intuitive enough.

Vitaliy

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