This is a common issue on many aluminum rims, from almost all manufacturers.
First see if the retailer you sourced for tires will fix it. You didn't pay to have tires that need airing-up every week! Some will sand down the corrosion along the tire bead, some will apply a sealer.
Don't overlook the contact area of the tire valve, we had a leak due to corrosion at that area on one of our cars.
If it has been a few years since you bought tires (and the tire dealer won't fix yours) you could 'break' the bead yourself and sand the aluminum. Then re-inflate. If you are careful not to disturb the positioning between wheel & tire, they would not need any rebalancing.
The final most expensive remedy would be to have your wheels restored and refinished by a professional service. There are folks that do this in most major metropolitan areas. I have used Wheel Collision Center in Bath, PA, to restore alloys on our sports cars (some of which had deep gashes in them).
Refinished / Used Factory Alloy Wheels Sales & Repair - Wheel Collision Center
First see if the retailer you sourced for tires will fix it. You didn't pay to have tires that need airing-up every week! Some will sand down the corrosion along the tire bead, some will apply a sealer.
Don't overlook the contact area of the tire valve, we had a leak due to corrosion at that area on one of our cars.
If it has been a few years since you bought tires (and the tire dealer won't fix yours) you could 'break' the bead yourself and sand the aluminum. Then re-inflate. If you are careful not to disturb the positioning between wheel & tire, they would not need any rebalancing.
The final most expensive remedy would be to have your wheels restored and refinished by a professional service. There are folks that do this in most major metropolitan areas. I have used Wheel Collision Center in Bath, PA, to restore alloys on our sports cars (some of which had deep gashes in them).
Refinished / Used Factory Alloy Wheels Sales & Repair - Wheel Collision Center