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<p>[QUOTE=&quot;Orielensis, post: 3193544, member: 96898&quot;]I don&#039;t think so. EDTA works by &quot;catching&quot; and binding metal ions from metal compounds, and pure metals are not ionic.</p><p><br /></p><p>With very sensitive metals, the weak acidity of EDTA might be a problem. I guess it&#039;s technically possible to neutralize it by using a buffer solution, but at pH 5, I don&#039;t really see the need for this when cleaning coins.</p><p><br /></p><p>In practice, I have tried EDTA on silver, copper, billon, and bronze (the latter two without knowing the exact alloy) and didn&#039;t recognize it affecting the pure metal. No experiences with pure tin, nickel, or any other metals.[/QUOTE]</p><p><br /></p>

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