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I generally consider an adhesive to be something which adheres with a chemical bond, in this kind of setting. Hence I roughed the carbon with 240 grit and degreased the alloy in acetone. Using an adhesive that bonds, this should be sufficient. It would appear that the 515 adheres in the same manner that a silicone sealant does, and not with the tenacity of a cyanoacrylate or - even - the epoxy resin used with the carbon fibre which seems to actually adhere to aluminium pretty well.
Of all of the miles ridden on the framework built, the only failures I had were on joints where the ET515 was used, which I had to reinforce, en route, with garden wire (fancy).
What I learned is that carbon is a material that can be used for fabricated structures, however that any interfacing between it an another material is past what I can handle with my limited experience. ET515 is not the right adhesive, this is for sure. We traveled over 250 miles with 20+kg of luggage on carbon framed racks www.laureltache.tumblr.com
at over £30 when you include the syringe, nozzles and adhesive, ET515 is a very expensive mirror-tack.
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