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Corrosion carbon/alu, ti(4 posts)

Corrosion carbon/alu, tisweathog
Aug 7, 2001 10:09 AM
I live on the coast of Florida and sweat heavily, have badly rusted two steel bikes, and have been considering carbon and ti for my next bike. However, how about corrosion on carbon with alu lugs? This is what I have now, and the edges of the lugs are corroding. Will the corrosion work its way in between the tubes and lugs? I know from windsurfing equipment that salt corrosion on alu is just as bad as rust on steel. Is ti a better bet to beat this problem? Thanks in advance.
re: Corrosion carbon/alu, tiClyde
Aug 7, 2001 10:29 AM
Ti in this application will not rust, you must be careful about interfaces with the Ti though..such as seatpost,bottom bracket,etc..use the correct lube and check it on a schedule basis. Ti frames, assuming no crashes, could be used by your grandchildren.
re: Corrosion carbon/alu, tiWhatever
Aug 7, 2001 10:37 AM
I researched this a bit when buying my carbon bike. Calfee's techical literature mentions galvanic corrosion between carbon and aluminum as a potential point of failure. He states that there is no reaction between carbon and ti, so there is no risk of joint failure due to corrosion. You can read his whitepaper at:
re: Corrosion carbon/alu, tiDrD
Aug 7, 2001 6:40 PM
As was already suggested, either Ti or full carbon will be more or less "corrosion free" - in the case of the titanium, just make sure you grease the metal/metal contact points (seatpost, stem, etc.) and you will be fine (remove and regrease once or twice a year - more frequently if you ride in the rain)

To answer your question about undercutting at the lugs, it certainly can - keep an eye on it (as an aside, if you clean up and re-coat the lugs with a good clearcoat/paint, you can protect the aluminum)