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<p>[QUOTE=&quot;PenguineMinT, post: 95665, member: 4682&quot;]<b>The Great Steel Penney Experiment</b></p><p><br /></p><p>Allright I just finished my 1943 Steel Penney Experiment. For those who do not know, I was hoping to try to clean up some very corroded penneys that would normally be worthless. I used Vinegar, Gun Solvent, and 30% Hydrochloric Acid in various ammounts.</p><p><br /></p><p>The vinegar was margionally sucessfull after about 20 minutes some of the penneys showed a little better shine and a few bubbles but there was no major change. The solution was: 60ML Distilled Vinegar, 20ML Filtered Water, and a small ammount of salt.</p><p><br /></p><p>The Gun Solvent was slightly less sucessfull showing almost no effects other than a little more shine on allready clean areas. The penneys were soaked for almost 30 minutes with very little sucss.</p><p><br /></p><p>The HCL was much more sucessfull! 30ML of 30% HCL in 120ML of filtered water cleaned a lot of the corrosion off of the penneys, but left some tarnish and some rust still on. </p><p><br /></p><p>The second HCL attempt was much more sucessfull. This was 90ML HCL and 90ML Water. This removed virtually all rust, however I was unsucessfull in keeping them from loosing luster and becomming a dull grey color.</p><p><br /></p><p>My final attempt was to submerge one penny in 30ML of HCL for about a 1 minute 30 seconds. The Penney was then dumped into a solution of Filtered water and Baking soda. This was by far the most effective attempt. Had the penny not been of better grade (technical grade of VG+ I would say) This could almost be passed off as an UNC. Apparently neutralizing the acid before drying the coin is the most effective way of keeping luster because the coin is still very shiney now almost an hour after I have completed the experiment.</p><p><br /></p><p>I will edit this thread with pictures soon. Unfortunatley my web server is down for the night so... be expecting them soon.</p><p><br /></p><p>I plan wide scale tests with larger groups of penneys and possible other types of metals in the near future. If you have any suggestions or comments on this, feel free to send me an email or private message.[/QUOTE]</p><p><br /></p>

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