I think it won't succeed and may be dangerous, but good luck! Pennies since 1982 are made of zinc, which I believe will dissolve rapidly in muriatic acid.
I will try a 5% and 10% solution of Muriatic acid, both with and without salt as an additive and post the results soon. But most of the others could probably be salvaged if I could come up with a good cleaning solution for severe corrosion and concretion build up. Some are melded together - too bad to even attempt clean up. They were removed from a drain line after about a year of submersion. I have corroded pennies that have excessive scale and deposits built up on them. If this looks complicated 5% citric acid also must work. Try ammonium citrate- mixture of citric acid and ammonia(25%)-5% solution is good(dissolve 50 gms citric acid in 1 lit water,add ammonia to pH 9). I don't see you needing any more than 10% acid to the solution. After that, try a mixture of muriatic acid in a warm water bath. A dry tumble in walnut shell will more than likely get most of any "wishing well wish residual" (sorry, I couldn't resist) off. If you leave the pennies longer than 30 seconds they go black. One mother is using a very strong bathroom cleaner that is for removing rust deposits from sinks. Is there a way to remove the corrosion and save the penny. My question is, if there is a something that divers use to clean corrosion off copper- like pennies? We have tried all the science fair type of solutions, but there are bags of pennies. The water has corroded and pitted the pennies (silver coins were easy to clean). There are a lot of coins and the money nice but the only way the bank will take it is to have it cleaned up. A local mall has generously donated money from their wishing well. I'm a parent, working for a small booster club. ↓ Closely related postings, oldest first ↓ It should only take a few minutes then rinse them with baking soda/water to neutralize JA Hawkins An old crockpot that won't be used for cooking again works great, or any glass container that won't be reused for food. I use a homemade pickle bath, vinegar and salt, 1 Tblsp salt to 1 cup vinegar, then heat it. But we probably won't know for sure unless you are able to try his suggestion and report back :-)Ī. Goran is a metals conservator so my guess is that he knows what he's talking about.
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