Was Wondering What Would Cause This. Any Ideas?

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Author	Replies: 5 / Views: 796
Vivian410 Valued Member United States 119 Posts	Posted 04/12/2019 02:42 am I was just wondering if anyone knows what would do this to a worn penny? I know that it isn't worth anything. I just think it looks cool and I am very curious as to why it would turn black like this. I would love to know your thoughts on it. Thanks! The penny is smooth too. Report this Post to the Staff

Errers and Varietys Bedrock of the Community United States 74817 Posts	Posted 04/12/2019 03:00 am To CCF! Just a damaged coin with Post Strike Damage ( PSD) unfortunately. The damage happened after it left the U.S. Mint. Errers and Varietys. Report this Post to the Staff
Big-Kingdom Pillar of the Community United States 1667 Posts	Posted 04/12/2019 03:54 am I could only guess but looks like some sort of mild corrosive to break down the copper on the high points exposing the zinc and turning it black. Report this Post to the Staff
JimmyD Bedrock of the Community Canada 21635 Posts	Posted 04/12/2019 07:42 am Looks like the copper plating has been buffed off exposing the zinc core which has turned black. The zinc will eventually start to rot Report this Post to the Staff
Coinfrog Bedrock of the Community United States 94367 Posts	Posted 04/12/2019 08:30 am Exactly so. to the CCF! Report this Post to the Staff
Vivian410 Valued Member United States 119 Posts	Posted 04/12/2019 10:57 pm I figured that the copper playing had been rubbed down to expose the zinc. I am just curious about what would cause zinc to turn black. I am thinking it is some sort of chemical reaction. Thanks for your thoughts on it! Report this Post to the Staff
	Replies: 5 / Views: 796

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