That's good to know that Ford is replacing your rims. I just wanted to add that I am experiencing the same issue. I have a 2014 Fusion SE, built up with the black aluminum 18'' gloss wheels. I bought the car brand new in October of 2013. The Winter has been brutal. I just noticed that all 4 rims are peeling in multiple areas, where it's visibly noticeable. I barely drive the car and have less than 5K on it. It's garage kept and I run it through a touch-less car-wash once a week, just to get the dust off of it and what not. I don't use any crazy weird chemicals on my rims. I use exactly what the manual states.
This is really concerning me, because this was an option that I paid extra for these rims, pretty much a requirement of mine, since I really like black rims, especially on a black car. Ford says they have not heard of any issues with rim issues; however they have agreed to replace all 4 rims with no cost to me under the 36,000/3 year bumper to bumper warranty. I hope the rims were just a bad batch that since have been corrected, because Ford will ONLY replace the rims with the exact same ones. Ford will not replace them with any other comparable rims.
I hope there's a recall soon on these rims, it appears it's a wide spread issue, regardless of the climate.