carl.froehlich(at)verizon
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 Posted: Fri Mar 02, 2012 6:29 am Post subject: Corrosion - was Windscreen Gap |
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Yep - the warning is to avoid aluminum contact with finished carbon on
fittings and such. This typically (as I understand it) is transitioning
carbon tubing to an aluminum fitting. In this case you have the condition
of moisture trapped between the two dissimilar but conductive materials,
creating the corrosion potential.
In my application carbon fiber and epoxy where applied to the aluminum skin
in assembly. This eliminates the issue.
Expanding the topic, this highlights the typical corrosion issues in our
planes. Mainly steal bolts in aluminum holes (e.g. spar bolts) and steel
gear legs in steel gear leg mounts. I use a liberal amount of white grease
for all such metal to metal contact. Some may recall when Van's did the SB
on the two seat tri-gear RVs to modify the front gear leg. Many needed a
torch to get the gear leg out of the mount because of corrosion. On my 8A
the leg slipped right out - 8 years after install.
Carl
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