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I thought I would post a pic of this RPM in a slab. All the oxidation started after the coin was holder-ed and in a safe.
Remember humidity can reak havoc on steel cents even through a holder-ed coin!!!! So be Ware!!
You might need Intercept Shield Boxes and some silica packs in your safe. I feel like I read a slab/corrosion horror story every 6 months or so. There was an interesting ANA article on a flood and how the collector found out they are not air or water tight - or the collector (on CT maybe?) who experimented with various gases in a bag with a newly slabbed silver coin. The coin turned black. I don't think it would be all that hard to seal a slab up so it was airtight - maybe it could involve a slightly higher fee - I don't know...
That's why I don't jump on the bandwagon when everybody yells "slab it" for protection. You can buy an airtite much cheaper and reuse it if necessary. I keep silica packs amongst all my Lincolns.
It would be nice if they could do that Jason, but they still would not guarantee it. I have 6 desiccant packs in there now and I microwave dry them about every six mos, also have most in the cases; I asked for two more with my last submission, received ""0"" None of my other slabs on copper or silver have this problem. Just the STEEL.
I have not seen this happen with mine. I wonder if it is something environmental, beyond the normal humidity that is encouraging the steels to corrode? Being that coins are rarely made of steel, maybe it something in the plastic of the holder, something overlooked? Or some gas present in your safe? Weird. Maybe someone with a chemistry background could generate a hypothesis?
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