A Tip.
Before you put the rotors back on, clean off the studs and the hub with a wire brush (preferably a drill mounted wheel brush)to remove the corrosion. Then put a LIGHT coating of
anti seize compound (also by Loctite as well as others)on the studs and where the rotor mates to the center hub. Wipe off the excess with a paper towel before putting the rotor and lug nuts back on. You just need a coating to prevent further corrosion from occuring! You DO NOT want to have any get onto the braking suraces or the pads! Use gloves when you work with this stuff because it is real messy and a [censored] to get off your hands. Next time you need to remove a rotor they will come off much easier! Reapply the anti seize on occasion to continue to prevent further corrosion. Once a year should do it. Best to do just before winter as road salt really causes a lot of corrosion!
FWIW.