Rust in space

What would happen to the International Space Station if the astronauts were to leave? - Slate Magazine

According to this article, if NASA has to abandon the ISS, it should still last a few years and be capable of re-use.

One point they make about it I had not heard before:

Assuming the station didn't come careening out of orbit, its interior would stay in pretty good shape for quite some time. Rust is occasionally a problem up there—corroded wiring briefly disabled the orientation system in 2007—but that's only a risk when there is moisture emanating from the humans and animals onboard. NASA could easily dehumidify the station before withdrawing, preventing significant rust.

Actually, now that I think of it, does that make sense? Electrical wiring doesn't normally have much (or any?) iron in it, does it?

Will Google that later...