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<p>[QUOTE=&quot;Just Carl, post: 517861, member: 4552&quot;]Not meaning to bore anyone but a few more things to consider. For one thing there is no standard type of Vinegar. The items you purchase in a store called Vinegar is a solution of Water (H OH) and Acetic Acid (CH3COOH). The amount varies by anywhere from 4 to 8 % by volume and may vary even more if not sold as a food product. This would mean the results of such experiments may also vary and if the Acetic Acid is strong enough, the coins may well get more than you bargain for. </p><p>To carry this further you must realize there is Fe2O3 (Magnetite) &amp; Fe3O4 (Hermatite) let alone the many other possible compounds pending on where that coin has been. An example is FeCl3. </p><p>The idea here is to remove the contaminate from the coins and unfortunately, the process would start again. The removal of the rust on such coins would have no monitary effect since those are usually sold for about $1 in Uncirc grades at coin shows. Many of the rusted ones are sold at flea markets for less than $0.25. Pending on how much time, materials, gas for you car to purchase those products to remove the rust you now have a multi dollar coin worth about $0.10 or less. </p><p>Of course it was fun attempting though.[/QUOTE]</p><p><br /></p>

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