Different brands rust more than others. I've found the best fix is a monthly car wash in a unit that does undercarriage spray......ours local car wash is a no brush unit.
Minnesota seems to be especially bad for salt caused rust. A friend that drives little had to replace aluminum rims when he replaced tires.
My in-laws live in central MN and they've had trouble w/AL wheels on multiple vehicles corroding such that they'd experience slow leaks. Sometimes a dis-mount of the tire and then polishing of the bead-mating surface of the wheel would suffice. A couple of times they just bought new AL wheels.
