steel rotor / alloy wheel corrosion

Is there anyway to minimize the alloy wheel corrosion that occurs when the alloy rim seats against the steel rotor? There is always enough corrosion (from dissimiliar metals reacting - aluminum against steel) that I always have to kick on the tire's side to break the bond. Sometimes I have to rotate the tire a few times while I beat on it. Does anything work to minimize the corrosion ; like wax or oil?