Corrosion

Our soil here about 10 miles from the water is quite sandy. It is made up of shell and if you dig for a well, you come up with all sorts of old sharks teeth, shell, and bone. The local gravel pit hit a large area of tiny tan bivalves. As you can imagine, the minerals in the soil really can do a hurting on anything iron. Many people around here have problems with kidney stones (caused by mineral deposits in the water such as calcium). You can't run a sprinkler close to the house since the water can leave rust stains on the side.