Slow metal ionization {rusting} {corrosion}| can use oxidation, from oxygen in air or acidic water. Metal impurities make circuit from impurity to metal. Corrosion rate depends on exposed area. Aluminum oxide covers aluminum and prevents further corrosion.
Zinc coatings {anodized}| protect metal, because zinc corrodes first.
Because it is electron source, magnesium can prevent corrosion by returning electrons to metal {cathode protection}.
5-Chemistry-Inorganic-Oxidation-Reduction
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Date Modified: 2022.0225