Subject:
Galvanic corrosion of al and carbon.
From:
"Robert P. Pisani" 
Date:
1/17/13 6:30 PM
To:
Hubert van Hecke , Walter Sondheim 


Did a search of galvanic corrosion of Al and carbon fiber.  It seems to 
be a very popular topic now that carbon fiber and Al is being used on 
cars and boats. Boeing has a web page on it 

http://www.boeing.com/commercial/aeromagazine/aero_07/corrosn.html

Also found this On other pagers.  

Galvanic erosion will attack the aluminum at the interface 
of the two materials and turn it to dust. And, if there is any 
water present, the destruction of the mechanical bond will be 
rapid.

"Carbon Fiber does indeed attack aluminum 
voraciously if any hint of moisture gets into 
the matrix. All the metal parts on the F-16 fighter that
contact CF are Stainless Steel, Passivated to more closely 
match the electronegativity value of the two materials."

Would be interesting to take a resistance reading between the foam 
and the Al to see of all the tubes are making contact or just the 
ones that leak.   Don't know if I took that measurement yet.

Rob