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<p>[QUOTE=&quot;2manybooks, post: 591312, member: 8267&quot;]I would suggest this recipe only be used when the whole item can be thoroughly washed immediately after use. Citric acid is a fairly mild acid, so not a major concern. But there is a potential problem with the salt, NaCl. Chlorides can react with copper and copper alloys, forming corrosion products that are quite persistent. &quot;Bronze disease&quot; is caused by contamination with chlorides. It won&#039;t be immediately apparent, but any chlorides left on the object can react with moisture in the air to create hydrochloric acid. This is why objects recovered from salt water or salty soil can be so difficult to stabilize.[/QUOTE]</p><p><br /></p>

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