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<p>[QUOTE=&quot;Lehigh96, post: 447532, member: 15309&quot;]I got all you need Ruben.&nbsp; Here is a photo, Hope you don&#039;t mind but I erased my last name.</p><p><br /></p><p><img src="http://i117.photobucket.com/albums/o59/ACPitBoss/LehighDegree.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>For those that don&#039;t know, Materials Science is seperated into three categories, Metals (metallurgy), Ceramics, and Polymers (plastics).&nbsp; My degree is in metallurgy with a specialization in you guessed it, corrosion.</p><p><br /></p><p>To quote Ruben &quot;And it is finished when either A) it runs out of oxygen or sulfides or&quot;&nbsp;&nbsp; OK, please explain where the sulfides are coming from if the coin is slabbed and stored properly.</p><p><br /></p><p>Furthermore, many of the bag toned Morgan Dollars that exhibit rainbow toning sat raw in bank vaults for decades just to form the thin oxide layer that appears as rainbow colors.&nbsp; And these coins had no shortage of oxygen and a direct source of sulfur, not just hydrogen sulfide gas in the atmosphere.</p><p><br /></p><p>Just because you can throw around some basic knowledge of chemistry &amp; thermodynamics does not mean that you know how to apply that knowledge to a practical application.&nbsp; If you were able to do that, then you would understand why a properly stored slabbed coin will not continue to tone and turn black before your life ends.</p><p><br /></p><p>I do think that the study of oxidation on silver coins would be a great idea for a PHD thesis.&nbsp; Maybe I will send an e-mail to Lehigh&#039;s Materials Science department to see if they can help me out.[/QUOTE]</p><p><br /></p>

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