04-16-2008, 07:10 PM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 3,670
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The aluminum siding, fascia and soffit is anodized prior to painting or powder coating. The anodizing forms an oxide which protect the aluminum from further corrosion. I wouldn't worry about the steel and aluminum and corrosion. the steel is pretty much inactive as an electrode where corrosion is concerned. If the nails were galvanized then I'd worry. The galvanizing process deposits zinc onto steel. zinc is an active metal.
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