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<p>[QUOTE=&quot;desertgem, post: 3099273, member: 15199&quot;]I could assure anyone looking at the cents in the photo that water was involved. Migration of the metallic bound atoms can not migrate~ copper into zinc or v.v. , nor sulfur ions, nor other common corrosion chemical does not occur without water, or heat greater than life can live, crushing magnetic fields, explosions, etc. etc ( Radioactivity not counted). Keep the coins at a temperature close to your own, don&#039;t shoot copper coated bb, or larger into the coins, throw some sacrificial copper zincolns in the zip lock bag, seal well and put into safe keeping with dehydrating chemicals outside the ziplock but within the safe/box and you will migrate into corrosion before they do. Do recharge the desiccators and replace the sacrificial coins. Getting rid of water is the key!</p><p><br /></p><p>I think this idea of contact corrosion, etc. got started with cute names such as &quot;bronze&#039;s disease&quot; . &quot;zinc rot&quot; etc. Even desert sand has some moisture. If your house can support mold, you are in trouble. IMO&nbsp; Jim[/QUOTE]</p><p><br /></p>

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