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All Forums Category: General Numismatic Forums Forum: Main Coin Forum

Treating Iron Coins With A Tannic Acid Coating

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joe_77
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 Posted 02/11/2024  04:35 am  Show Profile   Bookmark this reply Add joe_77 to your friends list Get a Link to this Reply
While researching the usage of tannins as corrosion inhibitors, I found this almost 10 years old thread. Would love to know if anyone has anything to add to this discussion?

As an example, would be interesting to know more about the more moderns approaches mentioned below!


Quote:
Interesting, I've never heard of using specifically using tannic acid. Personally, due to the acidic nature of it and the fact that it leaves an ugly coin, I would not use it. It may provide a layer of protection but there are much better choices these days for corrosion inhibitors.....there are literally thousands.


This paper is pretty interesting and features a huge list of them at the very end: https://digital.csic.es/bitstream/1...tefacts.docx

Edited by joe_77
02/11/2024 04:40 am
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