Term Description
Active metal (anodic)

A metal or material that readily gives up electrons to a cathodic (noble) material. (See "anodic.") An active metal will corrode in the presence of moisture when in contact with a cathodic metal.
Anodic

A metal or material that readily gives up electrons to a cathodic material in the presence of an electrolyte (see "galvanic cell," "galvanic series" and "cathodic"). As a result, the anodic material oxidizes to protect the cathodic material from corrosion.