Originally Posted by
Slaninar
I've seen it happen - alu post, steel frame combination. In a matter of a few months in not too humid environment. Unless the customer was lying, but the bike did look freshly painted and the seat post did look like new.
I will continue to be skeptical, but admit that my opinion is subjective and only based on my acquisition of a few dozen old steel bikes (some of them coming from crappy environments too.) Perhaps the post was a weird alloy or maybe there was some source of current from a lighting system, etc. Was he using a carved saddle? Butt sweat is a great electrolyte.