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 Replies: 9 / Views: 1,711 |
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Valued Member
200 Posts |
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Bedrock of the Community
United States
62064 Posts |
Someone took a straight pin and poked holes through the plating. Damaging the coin. These are spenders. As the coin is now damaged and a damaged coin is only worth face value. (Unless it is a silver melt coin, then it is worth melt value)
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Valued Member
 200 Posts |
Ok, I'm kinda weird and like PMD. Atleast the cool looking PMD coins. Thanks much! |
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Pillar of the Community
Canada
6244 Posts |
@RCarv If you like those coins is OK. "Gustus non disputandus" mean: "the test could not be judge". But prepare a large stock of 2x2, dimorph transparent pocket pages and cartable. For fast judgement of PMDs a large database of those coins could be useful. Who Know?
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Bedrock of the Community
United States
10635 Posts |
Extreme zinc rot. Spend it while you can! This coin is literary eating itself!  |
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Valued Member
200 Posts |
Lmbo..
Until the rot kills the coin, it makes President Lincoln look like he has bad case of Acne..
I really do appreciate yall..
I know I post alot of random things. Mostly pmds but I do find real erros, I don't post bc why ask questiin I already know the answer to.
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Pillar of the Community
Canada
6244 Posts |
I do not think this is zinc oxidation. I do not see the bluish-green oxide of the zinc. the white spots are simply surface not invasive for zinc. Wash with soap, soft soap must clean. After a while in the humid slow dry environment will do again. Propriety of the most anticorrosive industrial metal use.
If you has error post even you know they are. Could be very interesting studies of coins error. Some are very rare and everybody want to see at least one time.
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Bedrock of the Community
United States
94367 Posts |
This coin is totally beyond hope.  to the CCF! |
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Pillar of the Community
 United States
4618 Posts |
to the CCF!  Zinc rot can be found on lots of modern cents. Once the copper plating is compromised it's just a matter of time before the zinc begins to break down, weather from chemical contact or just the moisture in the air. I proposed a new design that I call the Pizza Moon Cent or PMC. It would help hide imperfection like these on the US One Cent coin, but the mint hasn't accepted it yet. I guess they just can't see true jenius when they see it.  ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!! 
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Pillar of the Community
Canada
6244 Posts |
Yokozuna is right. I like his pizza coin and I wish to has one in my lab. To explain a little bit the corrosion of the zinc. the first step of corrosion is "white rust" which is a protective passive corrosion. If this broke rapidly can change to bluish-green and then to deadly black. I sad broke because the protective passivation was broke and the oxygen can penetrate. this happened in humid atmosphere and slow processes of drying, general in rural locations, but not strict there. In industrial locations due to the most carbonated atmosphere the process is most faster. I quote here from Resourches notes from International Chemistry School: Quote:
The corrosion protection could be explained by the formation of a protective organometallic layer on the zinc surface due to the chelation reaction between zinc and inhibitor molecules. Zinc and zinc-coated products corrode rapidly in moist atmospheres forming white corrosion product—white rust. Thus it is necessary to protect it from corrosion in acid as well as in alkaline medium. If the white rust how we say is non destructive and is reversible, the bluish-green and then black are irreversible and is dead penalty for the zinc surface and metal. funny thinks is that in copper is reverse: black is protective (reversible) but bluish-green and at the green not. I like those studies and the yokozuna pizza coin. |
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Replies: 9 / Views: 1,711 |
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Posted 04/02/2021 12:51 am
