Had the same problem recently. Shop called it "rim peel". They cleaned the aluminum rim and applied silicone. Problem solved! Never had this problem before. Guess it happens with age. I live in desert...No rust.
Silicone as in glue/sealer or liquid/paste grease? Silicone on bead seat can cause another problem. The rubber on the beads does not stick or have enough friction to hold tire in place. I just had an issue with new Pirelli's installed by Sam's. Tech used regular bead lubricant but WAY too much and all over bead area not just where the the machine runs on the bead. My '17 Honda Accord 4 cyl, 6MT actually had both front tires slip/spin on the rim. RF by almost 180 degrees and LF by either 90 or 270. No air loss but threw the balance off which on both that made for a crappy road trip. Sam's made good on it when I went back.