Sacrificial Anodes against Corrosion

Cathodic protection can also be achieved by a more traditional way, namely sacrificial anodes. This method is to connect the protected metal structures with a more active metal or alloy. When two metals are electrically connected to each other in an electrolyte (e.g. seawater), the more active metal (anode) supplies current and dissolves (sacrifices) to effectively protect the other metal (structures)