Sacrificial anodes are metal components used to protect other metal structures from corrosion. They are typically made of more reactive metals, such as zinc, magnesium, or aluminum. When attached to structures like boats, pipelines, or storage tanks, these anodes corrode instead of the protected metal, extending the life of the equipment. The process works through electrochemical reactions, where the sacrificial anode acts as a "sacrificial" target. As it corrodes, it releases electrons that help to prevent the corrosion of the more valuable metal. This method is commonly used in marine applications and underground installations to ensure durability and safety.