[jugg1es]

this is an interesting question. Electrical current creates an EM field that could repel water molecules and oxygen ions. Temperature could also slow oxidation down... like I'm trying to imagine a red hot piece of iron rusting. I wouldn't think it would rust as fast as a cold piece of iron.

[ethbr0]

High temperature speeds oxidation. Learned as a consequence of blacksmithing. ;) So red hot iron absolutely rusts, you just beat the (brittle) oxidation off as you work the piece.

[jugg1es]

learned something today - thanks!

[HeyLaughingBoy]

> Temperature could also slow oxidation down

Gonna have to guess that you've never had to replace a car exhaust :-)

[mauvehaus]

Car exhaust is a weird case though. The water vapor in the exhaust condenses on the cold metal. If you drive far enough, you add enough heat to evaporate the water back out. Else, you end up with a bunch of water in the exhaust facilitating the rusting.

In general, you have this problem with cold metal when there's enough humidity to cause condensation. Bare cast iron in an unconditioned space under cover will definitely rust from condensation.

[zmgsabst]

Anodizing (controlled oxidation) is done via water with a current through the piece to anodize.

https://www.youtube.com/watch?v=gIwvLuNzliI

I’d think that charge would create a faster rusting.