Robert, I wouldn't think the generator wire would be the cause.
It sounds like the bare aluminum is exposed near the machine screw and is corroding; aluminum corrosion is generally white. Having dissimilar metals in contact (steel and aluminum in this case) can speed up the corrosion process, if I recall correctly when steel and aluminum are in contact the aluminum ususally looses. The process usually requires moisture. You suggestion for fixing this issue sound correct. If it were my bike I would take the rack off, remove any corrosion, touch up any missing paint and reassemble using some sort of grease. (The grease can also help keep moisture out, if the space is full of grease, less room for water). Stainless steel hardware may help too. Hope this helps. Angus On Dec 21, 12:06 am, SocialBlunder <[email protected]> wrote: > An aluminum rack attached to an aluminum frame is foaming at the > (presumably steel) machine screws. The foam looks like the cruft that > gathered around battery posts in old cars. The wire that powers the > taillight from the hub generator is wrapped around the center of the > rack a couple times. > > This rack did not cause any foaming on the aluminum frame it used to > be on - but it didn't have a wire running through it either. > > Is this an expected reaction? Could the wire be helping? If I wrap the > wire more closely could it create enough torque to run a propeller? > <vbg> > > I'd like to stop the foaming - any tips or should I treat it like a > battery post and coat it in Vaseline once in a while? > > Best Regards, > > Robert --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Bicycle Lifestyle" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/bicyclelifestyle?hl=en -~----------~----~----~----~------~----~------~--~---
