Electrochemical protection is a method used to prevent corrosion in metals by using electrical currents. This technique involves applying a small electrical charge to the metal, which helps to counteract the natural electrochemical reactions that cause corrosion. By doing so, the metal remains protected and can last longer, especially in harsh environments. One common application of electrochemical protection is in cathodic protection, where a sacrificial anode made of a more reactive metal is used. This anode corrodes instead of the protected metal, effectively extending the life of structures like pipelines and ships.