| Author |
 Replies: 11 / Views: 557 |
|
|
Pillar of the Community
United States
2404 Posts |
|
|
|
|
Moderator
 United States
94672 Posts |
This is a weird one. Here is what I think:
I think it is post mint damage. Here's why:
I can see what appears to be the edge of the copper plating, but what what look like the zinc core appears to go up and over the top of the existing copper plating.
If you look at the very top of this anomaly at the point of it, I can see where the plating seems to end, but there is no zinc coloring there.
So, lets see how wrong I am here lol.
|
|
Pillar of the Community
 United States
2404 Posts |
It's weird how it looks like the Copper is being eaten away leaving the Zinc exposed. Who knows when it started and if it's going to stop. Another weird thing is the Zinc is exposed but no rot. This is my 5th one I've come across. The earliest 2005D and no rot on any of them. I don't know if you've seen the other ones but a couple of them are really extreme. It looks like the stuff is flowing/(bubbling?) up. Those two have the damage on both sides. All the coins have been out in circulation. Mike Diamond answered on one of them. Here's what he had to say a couple years ago.  Edited by RobO411
05/11/2023 9:18 pm
|
|
Bedrock of the Community
United States
62064 Posts |
Or the unplated planchet had something on the zinc planchet,after the plating happened, it may have detached off of the planchet before or after the strike.
|
|
Pillar of the Community
United States
2404 Posts |
It looks like it's getting eaten away after the strike. Here's one that I post a couple years ago. Again it's weird that if we find a coin that has zinc rot there's no stopping it from getting worse. These coins have no sign of it. If there is something say maybe eating away at the copper ( could) it be protecting the zinc. Could the zinc role before copper is applied could it have something to protecting it from rotting while waiting in storage?  You can see some copper in the flow. And above the steps it's under the copper.  Edited by RobO411
05/11/2023 3:52 pm
|
|
Pillar of the Community
Canada
6244 Posts |
For those coins was very long debates on different forums and also at other levels. Till now no-one can say exact what cause this. Me I think something on the blanks after milling which do not let that part to be plated and then with the time seem to eat the plating. One day when an fresh coin will be discovery and go direct to lab for analyzes will elucidate this mystery.
Edited by silviosi
05/12/2023 1:21 pm
|
|
Pillar of the Community
United States
4395 Posts |
I think this is was a rim burr that peeled away before the strike. It looks exactly like pre-strike damage I've seen associated with struck in rim burrs.
|
|
Pillar of the Community
United States
2404 Posts |
That sounds like a possibility but what about that it's traveling/etching towards the east?  |
|
Pillar of the Community
United States
4395 Posts |
That's likely from the copper plating there being pulled in by the J during the strike. Takes more metal to fill out the J and it has to come from somewhere.
|
|
Pillar of the Community
United States
2404 Posts |
 . Thanks Tanner. Sorry I just meant along this area.  |
|
Pillar of the Community
United States
4395 Posts |
Oh I see what you mean now. I don't have a good explanation for that. Does anyone know if zinc flakes? |
|
Pillar of the Community
Canada
6244 Posts |
@ TAN, me I never see Zinc flakes. Could be, but I never see. Here the etching seem on those coins be active.
I will compare with something many know: napalm. You shut, explosion, flame and stop. But not stop, rest and burn, burn, everything slowly, unseeing. Same reaction we find in others solute. I will not mention here because is easy to have and use for others purpose. Very dangerous. I saw peoples who touch and then internally was burn without any way to trait.
Me I see this. IMHO is need an EDS-EDX scan to see exact. To see what molecules are around those anomalies.
What it is interesting, is find on only some of the years and not overall.
|
| |
Replies: 11 / Views: 557 |
|
Posted 05/11/2023 12:18 pm
