How to choose the right anode for your boat?

Anodes protect the metal parts of your boat, such as the propeller shaft and the rudder blade, from corrosion. The anode "sacrifices" itself, so that the metal of your ship is spared. The choice of the right anode depends on the type of water in which you sail.

The choice of the right anode depends on the sailing area. Below you will find an overview of the different types of anodes and their applications.

Aluminum anodes – suitable for all waters

• Versatile option for fresh, brackish and salt water
• Wears faster in salt water, requiring more frequent replacement
• More environmentally friendly than zinc

Magnesium anodes – best choice for fresh water

• Provides the most current, which is essential for fresh water
• Not suitable for brackish or salt water due to rapid wear

Zinc anodes – optimal protection in salt water

• Longer lifespan in salt water
• Provides excellent protection against corrosion
• Not suitable for fresh water as it does not provide sufficient power

An anode should be replaced when it is 70-80% worn. If you leave the anode in place for too long, your boat is at risk of corrosion. Make sure that the anode is not covered with paint or antifouling, so that it continues to function optimally.

The life and performance of anodes are influenced by several factors:

• Sailing area – In salt water anodes wear out faster than in fresh water
• Number of anodes – Several small anodes distribute the protection better than one large one
• Paint System – A good paint system can influence the current output of anodes
• Material Choice – Magnesium gives off the most current, zinc the least, and aluminum is somewhere in between

Fresh water: Magnesium

Salt and brackish water: Zinc

Varied waters: Aluminum

It is important to strategically place anodes on vulnerable parts of your boat, such as the rudder and propeller shaft. This will ensure even protection.