Meaning of ACTIVE METAL in English

ACTIVE METAL

"A metal that is easily oxidized (corroded) in air. For example, sodium will violently react with air, aluminum will always have an air-formed oxide film on its surface, and iron is easily rusted. These metals have high negative standard electrode potentials and are high the on the electromotive series. Contrast with noble metal. "

Electrochemistry English dictionary.      Английский словарь электрохимии.