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 Replies: 31 / Views: 5,891 |
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Pillar of the Community
 Canada
5404 Posts |
HNO3 in other words nitric acid............but since we don't need you to hurt yourself using a dangerous product, try using Coca-Cola or Pepsi, the real thing, not diet. Get back to us and let us know how you make out. Any bronze cent Canadian or US should do the trick for your Chemistry experiment.
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Pillar of the Community
Canada
2427 Posts |
When using acid, the common public perception is that it will violently react with whatever it comes in contact with, which is not the case.
I use a mixture of Hydrofluoric/Sulfuric acid daily to Strip and Clean Aluminum. I can adjust the mixture to react violently which will leave pitting or I can mix it to make the metal smooth as a baby's bottom.
I use Hydrofluoric, Hydrochloric, Sulfuric, Phosphoric acids and others frequently. You would be surprised at what these acids can do to metals in a controlled environment.
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Moderator
Canada
10463 Posts |
The Royal Canadian Mint did not produce any coins for any other country, until the Dominican Republic in 1937. It is not possible for a foreign planchet. It does not take a strong acid to do corrosive damage to a coin. In fact, US Buffalo nickel collectors can even purchase a product 'Nick-a-Date' which helps reveal the date on worn Buffalo nickels. Try leaving a few coins in a solution of white vinegar and salt for a couple of day - you'll be surprised at the result. Quote:
Pleased support your "very positive " statements it is easy to say... but please give more than just empty chat. like what type of traces does which type of acid leave behind. AND, which acid "eats" cooper so even?... without pitting etc. Rather than the forum having to do your homework for you, have you tried any online searches? Start here: http://www.error-ref.com/acid-shrunk-coins/"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Moderator
Canada
10463 Posts |
Quote:
...Hydrofluoric acid Some pretty nasty stuff darryldarryl, we use strong hydrofluoric acids in our isotope labs, because it is one of the few acids that will completely dissolve quartz and other silicate minerals (in layman terms, never mind metals, it dissolves rocks!)... "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
Canada
2519 Posts |
darryldarryl, you got me curious, maybe I'll try distilling some vinegar (as distilled as I can get it using a pot on a stove anyway) and try this myself.
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Pillar of the Community
Canada
2427 Posts |
I totally agree SPP.
Edited by darryldarryl
11/24/2014 11:13 am
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Valued Member
Canada
180 Posts |
Appreciate the shared knowledge about corrosives, will be interesting to try an experiment in the not so distant future.
What if the Mint used corrosives in their minting process.
What if the blanks were not properly cleaned during this process.
What if the corrosives transferred to the dies as a result of the corrosives not being neutralized.
Would the result shown by 47P7 be possible then?
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Pillar of the Community
Canada
4227 Posts |
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Pillar of the Community
United States
4233 Posts |
What about just being in the ground for 50-80 years? The pictures give me the impression of a long slow process. Just curious.
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Valued Member
Canada
75 Posts |
Well, since we use 12% hydrochloric acid at a 50/50 solution of water and acid at work to descale coils maybe I will try some experimentation. I know I have several old 36's and can also use some mint 60's or 70's as well as I would like to try a unc one to. This could be fun and the boss will think I have gone over the edge for sure.  |
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Moderator
Canada
10463 Posts |
Quote:
What if the blanks were not properly cleaned during this process. A strike on an impaired blank, does not look anything like this. Even coins struck through caps, have a distinct 'orange peel' texture to them, not in any way similar to what 47P7 has shown. Quote:
What if the corrosives transferred to the dies as a result of the corrosives not being neutralized. Coins struck by rusted, and corroded dies, have been well documented in some early world and even early US coins, particularly gold coins. Any corrosion on the die, would be imparted as a positive relief feature on the struck coin. To turn this around, the first question I would ask is: how does one have a reduced diameter struck coin, with a rim, that looks like it was struck fully in collar, but is not showing any sign of being broadstruck (in which a reduced diameter planchet would be, since it would not be forced up against the collar die). "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
Canada
3234 Posts |
Would battery acid (sulfuric) give the same effect on copper as we are seeing here...? Everyone has quick access to battery acid..
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Valued Member
Canada
180 Posts |
Finally located one of the coins. Could take awhile before I locate others. Maybe I should try to organize a little better.    |
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Pillar of the Community
Canada
3234 Posts |
It's a shame to see such nice dates ruined in acid...
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Edited by DEVLEC
11/30/2014 3:13 pm
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Pillar of the Community
Canada
532 Posts |
I bought an acid coin once. One thing I'll never fall for again. Being ridiculed for it kinda cured me. https://goccf.com/t/189343 |
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Replies: 31 / Views: 5,891 |
First Page
Posted 11/23/2014 11:22 pm
