Galvanic action, sometimes referred to as galvanic or bimetallic corrosion, is an electrochemical process that takes place when two dissimilar metals are in electrical contact with each other under an electrolyte, like moisture or condensation. Here, the less electrochemically positive metal (the less noble metal, such as aluminium) becomes the anode and corrodes, and the more positiv... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php