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1993 Lincoln Cent - I Am Kinda Curious What Does This

 
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United States
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 Posted 01/26/2023  3:47 pm Show Profile   Bookmark this topic Add Izzylizzy to your friends list Get a Link to this Message
What causes coins to look like the have warts all over them?


*** Edited by Staff to Add Year / Mintmark / Denomination to Title. It's very important to have in the title. ***
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United States
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 Posted 01/26/2023  3:55 pm  Show Profile   Bookmark this reply Add MetalEarth to your friends list Get a Link to this Reply
From this website I ran into a few descriptions when I was looking at a quarter that had two acid spots yesterday. https://www.coinworld.com/news/us-c...es-vary.html


5. Plating blisters

Plating blisters develop in the coin in the immediate aftermath of the strike, as gas expands between the core and poorly bonded plating. Among domestic coins, plating blisters are the exclusive province of copper-plated zinc cents. Blisters are generally small and subcircular, with a smooth surface and soft outline. They can occur anywhere on the field and design. The design continues uninterrupted as it crosses a blister.


6. Occluded gas bubbles

Solely the province of solid-alloy coins, occluded gas bubbles form just beneath the surface and push up the overlying metal immediately after the strike. Like plating blisters, the surface is smooth and the edges soft. The design is uninterrupted.


7. Corrosion domes

Contaminants trapped beneath or penetrating the surface of alum≠inum, plated zinc, and plated steel coins can react with surrounding metal to form an expanding front of spongy, corroded metal. The resulting solid dome will superficially resemble a hollow plating blister or occluded gas bubble. In many cases the corroded metal bursts through and may fall out, leaving a crater.

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 Posted 01/26/2023  3:56 pm  Show Profile   Bookmark this reply Add Hondo Boguss to your friends list Get a Link to this Reply
Zinc rot in your zincoln cent. You don't see this in copper, clad, or silver coins.
Inordinately fascinated by bits of metal with strange markings and figures
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 Posted 01/26/2023  5:12 pm  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
Zinc rot, the perfect description.
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 Posted 01/26/2023  5:39 pm  Show Profile   Bookmark this reply Add Izzylizzy to your friends list Get a Link to this Reply
I have like a bunch of them this one is the worst one they vary.. I thought they looked like warts lol kinda cool though!
Edited by Izzylizzy
01/26/2023 5:44 pm
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 Posted 01/28/2023  12:21 am  Show Profile   Bookmark this reply Add Izzylizzy to your friends list Get a Link to this Reply
From all the examples I seen it resembles the occlusion eruption burst bubbles! Thank you
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 Posted 01/28/2023  01:49 am  Show Profile   Bookmark this reply Add silviosi to your friends list Get a Link to this Reply
the bubbles you see are from a heat. The zinc was at least 300 deg, Celsius and begone to melt.
NEVER ARGUE WITH AN IDIOT. FIRST THEY WILL DRAG YOU DOWN TO THEIR LEVEL. THEN, THEY WILL BEAT YOU WITH EXPERIENCE.
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