Is it normal for clad coins to not corrode when buried under water and in very fine earthen silt? Just pulled out my first clad buried in the silt of a small pool of water and both were in amazing shape considering they almost certainly had to have been under water for a decade and probably more. In fact the dime had turned a deep metallic blue while the quarter was probably the shiniest I've ever dug. Normally around here the acid rain just corrodes the heck out of any clad buried for any length of time. There appeared to be a very tiny water treatment building a ways above this pool of water. Could the chlorine from it been leaching into the ground water preventing any corrosion on the coins?
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Clad coins:
- Thread starter Mtnmn
- Start date