Did you know?
The U.S. Copper Penny is actually composed of 97.5% zinc and only a thin copper coating.
Reference: U.S. Mint
The graph below illustrates the expected service of a galvanized coating as a function of coating thickness in varying atmospheric conditions. As you can see, the life of a coating is linearly related to its thickness. Very simply, the thicker the coating, the longer it will last.
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