Aluminum alloys are known for their resistance to atmospheric corrosion. Their ability to resist corrosion is attributed to surface films. The behavior of aluminum underground is somewhat controversial, and not without reason. A break in the surface film will initiate varying degrees of corrosion, depending on factors such as, differential aeration, pH and soil resistivity.

Subject
Cathodes, Water, Anode potential, Anodic protection, Salts, Cathodic protection, Cathodic potential, Aluminum, Cathodic current, Acidity, Electric potential, Soil, Cathodic corrosion
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1968
Association for Materials Protection and Performance (AMPP)
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