Zinc Anodes: Common Choice
Zinc is the most common sacrificial anode material because it is easy to produce. Zinc anodes are well-used on most types of ships and are effective in preventing the metal parts of the ship from corroding in salt water. However, zinc is also a dense metal and has some environmental hazards.
Aluminum Anodes: Lightweight Choice
Aluminum is a lightweight metal that has begun to replace zinc in freshwater ships in recent years as a more commonly used anode material. Aluminum anodes can be used not only in salt water but also in fresh water and have a longer service life than zinc anodes. Studies have shown that aluminum anodes have a service life of 50% longer than zinc anodes in salt water.
Magnesium Anodes: Environmentally Friendly Choice
Magnesium is the third most commonly used anode material and is the most active anode with a relatively short life. However, magnesium is non-toxic and harmless to the environment and marine life.
