Bi metallic lugs are responsible for avoiding galvanic corrosion when joining aluminum conductors to copper bus bars in electrical systems. Galvanic corrosion, or dissimilar metal corrosion, happens when two dissimilar metals like aluminum and copper—are in direct contact in the presence of an electrolyte, causing faster degradation of the less noble metal. Bi metallic lugs are cle... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php