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