A picture will help. I think it highly unlikely that corrosion is holding the wheel in. Maybe there are some tab washers present that you haven't realised are present. I seem to recall these being fitted for a while to bikes of a certain vintage before suicide lawyer lips were put on all front forks. Penetrating oils yes but do not whack it with a lump hammer!
I had also considered this CA but none present that i can see on this pic of the Traffic Master but worth checking inside the fork next to the axle.
This is the sort of thing you should look for but maybe on the inside leg of the fork. You'll need to unscrew the nut fully to wiggle it out.