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Old 08-01-2011, 06:43 PM
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NickZ NickZ is offline
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Join Date: Mar 2010
Posts: 894
I notice that those plastic connectors have two or more different metals, including the wires that are being connected, as well as the screws, which also causes more oxidation to happen, when they are exposed to humid air. Green copper oxide crust forms on them easily. There is some kind of electrolysis going on there too.
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