Re: [ATM] Carbon Fiber and aluminum

[James P Crombie <jpcrombie@pei.eastlink.ca>]

Art
  Would this be true with Titanium as well,  seeing as its closely 
related chemically?

artbianconi@blast.net wrote:

>I've been away from hands-on fabrication of composite parts using 
>Carbon Fiber. A lot can happen in two years so I did some 
>homework. I discovered that the threaded aluminum inserts in my 
>carbon fiber truss tubes don't get along with carbon fiber at 
>all! 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.
>
>I bounced this discovery off a few aerospace engineers I know and 
>they confirmed my worst fears. One wrote back:
>
>"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 too if I am not 
>mistaken to more closely match the electronegativity value of the 
>two materials."
>
>If you propose to develop an OTA using carbon fiber, be certain 
>that your choices of metals and fasteners are CF tolerant,  or 
>insulate them first from direct contact with an intermediary 
>layer of fiberglass
>
>Art Bianconi
>
>This post and any attachments were tested before being sent and 
>found to be virus free. Our Norton-Symantic virus list is updated 
>daily.
>
>
>
>_______________________________________________
>ATM mailing list http://www.atmlist.net/
>
>  
>

_______________________________________________
ATM mailing list http://www.atmlist.net/