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<p>[QUOTE=&quot;Oldhoopster, post: 2800218, member: 84179&quot;]To respond to your snap judgement, I was able to find data on copper and 90Cu10Ni and the following common acids attack copper but not the copper nickel alloy; Carbonic Acid, &lt;30%HCl at room temp, Phosphoric acid, and Sulfuric Acid at room temp.&nbsp; Adding nickel tends to increase corrosion resistance in alloys up to the point where it no longer forms a solid solution, so I would expect the 75Cu25Ni (75% copper 25% Nickel) found in the clad layer to be more resistant but I couldn&#039;t find any specific comparison.</p><p><br /></p><p><br /></p><p>I recall reading comments on CT that Kentucky has chemistry training and he has a track record of answering chemistry related questions.&nbsp; You are correct in saying that it&#039;s never a good idea to assume that someone doesn&#039;t know what they are talking about, but based on the comments posted and track record on this type of topic, I think I know whose opinion I trust and who needs to &quot;admit that they don&#039;t know and quit making up nonsense&quot;.[/QUOTE]</p><p><br /></p>

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