Galvanic Anodes Galvanic anodes, (often called sacrificial anodes), protect metallic structures from corrosion without requiring an external current source. The difference in electrical potential between the anode and the metallic structure cause electrons to flow from the anode to the structure. The metallic structure is known as a cathode in this cathodic protection system. As [...]The post What's the Difference Between Galvanic and Impressed Current Anodes? appeared first on Allied Corrosion Industries, Inc..