Hi
Do you mean that they are corroding on the under the black paint on the spokes? Any pics of the corrosion?
I also have Glendales on a 62 plate but no corrosion at all, not even on the edges which do have some kerb damage

though they do get well protected with sealant. Not heard of anyone else with this issue either.
Much as I like them, they are a kerbing nightmare and as you say, Glendales and potholes are not a good combination

You must still be under warranty so I would push for replacement.