Anodes for hull and rudder play a crucial role in protecting a boat’s metal components from galvanic corrosion caused by saltwater and electrical currents. These sacrificial anodes, often made of zinc, aluminum, or magnesium, work by corroding in place of more critical metal parts, such as the hull, rudder, propeller, and shaft. Zinc anodes are ideal for saltwater, aluminum anodes work well in both salt and brackish water, while magnesium anodes are best for freshwater environments. Proper placement on the hull and rudder ensures effective protection, and regular inspection and replacement of worn-out anodes help maintain their function, extending the lifespan of essential boat components.