| Author |
 Topic  |
|
|
n/a
deleted
22 Posts |
 Posted - 05/26/2009 : 03:00:04
|
Does anyone know how to remove green corrosion from copper coins. We're baffled. Thanks.
davidrmj
|
|
|
Country
1000+ Penny Miser Member
USA
3121 Posts |
|
|
highroller4321
1000+ Penny Miser Member
USA
2648 Posts |
Posted - 05/26/2009 : 20:43:50
|
| Theres a chemical called Verdigone that is suppose to work wonders on copper cents. I belive coinhunter has used it. |
Copper Penny Investing
www.portlandmint.com |
 |
|
|
CoinHunter53562
1000+ Penny Miser Member
USA
1805 Posts |
Posted - 05/26/2009 : 21:38:01
|
| Yep Verdigone seems to get alot of good reviews. I believe Bad_Thad has registered over here as a user so try hitting him up on email or PM him. |
My hobby: collecting real money 1 copper cent or nickel at a time.
|
|
|
|
daviscfad
1000+ Penny Miser Member
USA
1664 Posts |
Posted - 05/26/2009 : 23:05:27
|
| i sent thad an email |
Inquiring minds want to know |
|
|
|
CoinHunter53562
1000+ Penny Miser Member
USA
1805 Posts |
Posted - 05/26/2009 : 23:07:39
|
| Has anyone here tried the stuff before? I am thinking about getting a bottle of it. |
My hobby: collecting real money 1 copper cent or nickel at a time.
|
|
|
|
daviscfad
1000+ Penny Miser Member
USA
1664 Posts |
Posted - 05/26/2009 : 23:16:15
|
| I have not tried it but they say it is good! One day i am going to break down and buy some |
Inquiring minds want to know |
|
|
|
CoinHunter53562
1000+ Penny Miser Member
USA
1805 Posts |
Posted - 05/26/2009 : 23:17:25
|
| I definitely should do it. I have some IHC's and Wheats that could use a little TLC. |
My hobby: collecting real money 1 copper cent or nickel at a time.
|
|
|
|
NotABigDeal
1000+ Penny Miser Member
USA
3890 Posts |
Posted - 05/27/2009 : 06:13:29
|
Why are you guys cleaning your coins, especially the Indians and wheats?
Deal |
Live free or die.
Plain and simple.
"If you love wealth more than liberty, the tranquility of servitude better than the animating contest of freedom, depart from us in peace. We ask not your council or your arms. Crouch down and lick the hand that feeds you. May your chains rest lightly upon you and may posterity forget that you were our countrymen."
- Samuel Adams |
|
|
|
daviscfad
1000+ Penny Miser Member
USA
1664 Posts |
Posted - 05/27/2009 : 09:10:25
|
| deal i think this stuff cleans it without damaging the coin. In my understanding it will do the same thing acetone will do to a coin which is nothing to hurt it. but thad would be best to talk to about it |
Inquiring minds want to know |
|
|
|
CoinHunter53562
1000+ Penny Miser Member
USA
1805 Posts |
Posted - 05/27/2009 : 09:25:41
|
| It's not a cleaning agent actually. It's a copper conservation fluid. Basically when you get the green stuff, it's verdigris and is ongoing corrosion of the coin. The Verdigone is designed to stop and eliminate the verdigris, and keep it from corroding further. That's how I understand it from reading a little about it. |
My hobby: collecting real money 1 copper cent or nickel at a time.
|
|
|
|
n/a
deleted
13 Posts |
Posted - 05/27/2009 : 15:48:49
|
Hello all and thanks for the interest and kind comments about VERDI-GONE™. The product works best on light to moderate verdigris. It's not very effective with thick, heavy verdigris. Coins with heavy verdigris have usually been damaged by deep removal of atomic state copper from the surface (pitting).
As mentioned, VERDI-GONE™ is a conservation fluid, not a cleaner. It is designed to not strip the patina from a brown coin. It is designed to ONLY react with and remove verdigris.
VERDI-GONE™ can be ordered through the website:
You must be logged in to see this link.
If you have any more questions, please feel free to PM me or post here.
Thanks |
Hardcore Lincoln Collector and Copper Hoarder! |
|
|
|
2cents
Penny Sorter Member
USA
44 Posts |
Posted - 05/29/2009 : 11:01:19
|
| Does a vinegar bath stop the corrosion process on copper pennies or does it just remove visible corrosion? |
2cents |
|
|
|
oober
1000+ Penny Miser Member
USA
1304 Posts |
Posted - 05/29/2009 : 12:54:37
|
Vinegar is an acid. Acids destroy metal... Acids depending on strength will remove metal a little at a time or a lot at a time.
Pennies in vinegar will turn a strange copper red color... Try it on some non numis ones and you will see. |
|
|
|
n/a
deleted
13 Posts |
Posted - 05/29/2009 : 23:12:48
|
Vinegar is not really acid, it is "acidic" by virtue of it's acetic acid content. It will certainly remove verdigris, but very harshly destroying the patina in the process. Also, free acetate radicals in the solution can actually contribute to the additional formation of verdigris in the form of cupric acetate.
You can use just about any acid to remove verdigris, but at the of expense coin's patina, it will be destroyed. Another popular one is muriatic acid (hydrochloric acid). Some people even choose olive oil, it contains organic acids. However, the ion mobility is so slow in oil, olive oil takes FOREVER to work. All of these weakness are what led me to develop VERDI-GONE™....I made it for myself. The only reason I commercialized it was collector demand. I had tons and tons of requests to buy it....so here we are today.  |
Hardcore Lincoln Collector and Copper Hoarder! |
|
|
|
highroller4321
1000+ Penny Miser Member
USA
2648 Posts |
Posted - 05/29/2009 : 23:46:31
|
quote:
Originally posted by BadThad
Vinegar is not really acid, it is "acidic" by virtue of it's acetic acid content. It will certainly remove verdigris, but very harshly destroying the patina in the process. Also, free acetate radicals in the solution can actually contribute to the additional formation of verdigris in the form of cupric acetate.
You can use just about any acid to remove verdigris, but at the of expense coin's patina, it will be destroyed. Another popular one is muriatic acid (hydrochloric acid). Some people even choose olive oil, it contains organic acids. However, the ion mobility is so slow in oil, olive oil takes FOREVER to work. All of these weakness are what led me to develop VERDI-GONE™....I made it for myself. The only reason I commercialized it was collector demand. I had tons and tons of requests to buy it....so here we are today.
Watch what you say around badthad....he is a chemist |
Copper Penny Investing
www.portlandmint.com |
|
|
|
just carl
Penny Hoarding Member
USA
601 Posts |
Posted - 06/30/2009 : 08:44:54
|
quote:
Does anyone know how to remove green corrosion from copper coins. We're baffled. Thanks.
davidrmj
You never mentioned the date, mint mark or condition of the coin(s). If not a valuable coin it may well not be worth your time and expense to even try to remove dirt, corrosion or other contaminates. If you just want to try on a non valuable coin, just stick to stuff around the house already such as Lemon Juice, Tamato paste, baking soda and water solution, etc. Fun to experiment and if NOT a valuable coin, not much to loose except your time. If the coin is or could be valuable, may do more damage to the coin ruining what value it may, could have.
Many run out and purchase flamable, dangerous, chemicals to clean valuless coins and then have those dangerous chemicals just laying around waiting for an accident. |
Carl |
|
|
| |
Topic |
|
Green Copper Corrosion
Forum Locked
Posted - 05/26/2009 : 09:33:33
