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Old 5th February 2008, 04:01 AM   #5
Join Date: Aug 2006
Posts: 1,191

JM, I think its a form of galvanic corrosion that happens (in which the carbon would more act lik a catalyst). I remember this being a big problem with fx some Specialized carbon bikes with alu lugs in the early 90s. The general "trick" is to use a thin layer of fibreglass as an isolation layer betwen the carbon and alu.
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