intergrandular corrosion of wing spar

Does stuff like Corrosion X help prevent it?

On 16 Jan 2005 18:07:39 -0800, "Robert M. Gary"
wrote:

Does stuff like Corrosion X help prevent it?

no
because the corrosion is actually occuring between the metallic
components of the alloy deep below the surface.
in 2024 the copper and aluminium can react together.

anticorrosives applied to the surface cant get near it so they are
ineffective.

dont feel too special even boeing airliners have had expensive spar
repairs because of it. piper cherokee flap ribs are quite susceptible
to it.

if you ever take a little tap hammer and tap along a spar web surface
and hear the sound change for no apparent reason you've probably found
intergranular corrosion. (thats how the boeing corrosion was found)

Stealth Pilot