We have 7 bikes, all stored in the same room, and ONLY my road bike has this issue. Wife's bikes as well as my other bikes, which don't see so much sweat have no issues. My Surly has the same chain now for 2 years and 6000km and no issues. That's why I'm convinced that it is the sweat.
Wife's chains last a year, while mine rust in a couple of months, and sometimes as early as one month.
So, after a lot of research I found that Wippermann makes stainless chains. Just ordered one, and will give feedback on this thread. Putting it out here in case anyone else has also been having such issues.

http://www.wiggle.co.uk/wippermann-conn ... eed-chain/
They have another one which is 50 pounds plus, but I think that is really steep for a chain. If this lasts me double my regular chain and/or requires less maintainance, the money will have been well spent. Good reviews, and the Connex removable link has great reviews too.




