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Pillar of the Community
United States
4932 Posts |
Welder you gotta show some pics of that coin, some 37 years later. Quote:
This would help CCF money wise.
How is that?  |
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Rest in Peace
United States
4078 Posts |
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Moderator
 United States
189949 Posts |
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Bedrock of the Community
United States
17884 Posts |
Quote:
Also, don't they make an automotive rust remover to loosen rusty bolts? I think I have a bottle in my garage. Those are typically a small molecule petroleum distillate and a weak acid solution. The acid solution dissolves the rust while the petroleum distillate penetrates into the tiny cracks and caries the acid in with it. (the distillate also acts as a lubricant.) |
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Pillar of the Community
  United States
5828 Posts |
Guess who gets to revisit this for one of his physical science finals  Me, if you couldn't guess... Can't wait to do it and share my new findings! |
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Moderator
United States
189949 Posts |
We await your results.  |
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Pillar of the Community
Canada
5324 Posts |
Try pure lemon juice on copper pennies, it does surprising results, only on common coins of course.
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Pillar of the Community
United States
562 Posts |
Going off the lemon juice suggestion, I tried a solution of two tablespoons lemon juice, one teaspoon salt a while back. Cleaned a rusted steel penny right up. It'll never be the same, but the rust was gone.
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Bedrock of the Community
United States
19972 Posts |
Ferric corrosion is very difficult to deal with. For sure acids are the best thing to use but, with coins, it will really damage the surfaces. I've always recommended an EDTA solution, it's a great chelating agent that will minimize damage to the coin, especially if you add a little sodium hydroxide to make the solution on the basic side (pH 7-9).
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Bedrock of the Community
United States
19972 Posts |
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Try pure lemon juice on copper pennies This is simply an acidic solution, i.e. citric acid. Acids are very destructive to metals/coins. In general, they should NEVER be used on coins. Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Bedrock of the Community
United States
20753 Posts |
In other words someone could go out and buy several dollars worth of chemicals, a gas mask, clear a place to work and POOF, you end up with a $0.01 coin that is now worth $0.02 maybe.  |
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Pillar of the Community
United States
1001 Posts |
These kind of threads are great for answering the questions that people have such as: "What if..."/
CofTW did this and sacrificed his coins so you wouldn't have to.
I wonder what would happen with Naval Jelly? I used to use this to clean the rust off of bumpers back in the day when that was a real issue.
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Bedrock of the Community
United States
94367 Posts |
just carl -  Edited by Coinfrog
11/17/2015 4:48 pm
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Bedrock of the Community
United States
17884 Posts |
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I wonder what would happen with Naval Jelly? Naval jelly's active ingredients are Phosphoric acid (up to 30%) and sulfuric acid (UP TO 1%) so it would remove the rust, and any remaining zinc plating. It is just another case of using acid to eat away the corrosion and do surface damage to the surfaces. |
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Pillar of the Community
United States
5828 Posts |
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Replies: 27 / Views: 5,296 |
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Posted 07/29/2015 07:17 am
