Wheel Rim problems of the 2000 Chrysler LHS

All 4 tires have been loosing air for about 2 months, I figured I needed new tires so I took the car to a mechanic and I was told they could not replace the tires because all 4 wheels have corrosion around the valve stems, and this would just continue to happen with new tires, my 2 rear tires do not need to be replace it is the corrosion which is causing them to loose air. I was told they have been hearing and seeing a lot of these problems with the 2000 chrysller Lhs wheels.

: the contact stated that the aluminum wheels that hold the tires were causing the tires to become flat. The vehicle has been through two tires on the same wheel within 3 weeks.

Air was seeping out of the four tires. The tires needed to be refilled with air every 3 days. The tire repair shop indicated that corrosion on the inside of rims was causing this to occur.