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Message:: [QUOTE="Ripley, post: 748984, member: 19199"]Sighhhhhhhh.... OK there is another way to get the corrosion out from the inside out. Ionize the sucker. Traci This is for you CARL !!!! (AKA. Homer Simpson)  Caring for your Copper, Brass, Bronze and Other Alloys  <a href="http://www.vam.ac.uk/images/image/39500-popup.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.vam.ac.uk/images/image/39500-popup.html" rel="nofollow"><img src="http://www.vam.ac.uk/images/image/39500-small.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></a>Egyptian lamp holder, 1468-96. Museum no. 109-1888. (click image for larger version)  Problematic copper corrosion tends to form in spots that create pits in the surface. Sometimes the surface of a bronze object may look intact, but will have a pimply appearance - if you remove the surface over the spot you might find a corrosion pit containing light green powder.If left untouched, the pit will gradually get deeper and larger, and may eventually burst, revealing the corrosion below. *****The most active and rapid form of copper corrosion is known as bronze disease. This is caused by chlorides, which are particularly aggressive corrosive agents (e.g. salt, which is sodium chloride). This corrosion process, once initiated, will proceed quickly, forming a rash of spots which burst, spilling out light green copper chloride. These corrosion products will then cause more corrosion to occur. Bronze disease is rare and is mainly seen on archaeological copper alloy objects that were buried in salty soils or were in contact with sea water. If you notice spots with a bright greenish powder emerging, consult a conservator since, whether or not it is bronze disease, it is best dealt with by a professional.[/QUOTE]

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