Originally Posted by
rosefarts
The aluminum chainring became a lovely gray. The piece of a Shimano cog got dark but no corrosion if that makes sense. The other two Miche cogs, look brand new.
It's interesting. It'll be fun to observe the changes through the winter.
The cogs are probably chrome plated which is very resistant to corrosion. If you want ones that will rust, look for cheaper black cogs that are painted and remove the paint.