Cadmium corrosion is a term used to refer to cadmium plating or a cadmium coating because cadmium is resistant to corrosion. However, when cadmium is applied on other metals (e.g., iron, steel) it behaves as a sacrificial coating by corroding before the substrate metal to which it is adhered.
Cadmium is a soft white metal that can be electroplated as a versatile coating.
Cadmium corrosion frequently occurs in marine or alkaline environments when cadmium is applied to provide corrosion resistance to iron, steel, aluminum or other corrosion prone materials. It is used for sacrificial purposes by being preferentially corroded to expose smaller areas of the substrate.
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