Magnesium anodes are highly effective for corrosion protection in steel structures submerged in fresh water, such as river boats, canal boats, and cruising vessels. They are particularly suitable for combating corrosion issues caused by stray currents or pollution in freshwater environments.
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1-2 weeks delivery time MGD Magnesium Bolt-On Strip Hull Anodes are designed for use in freshwater environments. These anodes come with a convenient strip for easy installation and offer reliable protection for your vessel, ensuring it remains free from corrosion in freshwater conditions.
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€ 19,46
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1-2 weeks delivery time MGD Magnesium Bolt-On Hull Anodes are designed for freshwater environments, offering easy installation with their bolted connection. These anodes provide reliable protection against corrosion, ensuring the longevity of your vessel.
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€ 56
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1-2 weeks delivery time These MGD Magnesium Rudder Anodes are designed for use in freshwater environments and offer exceptional protection for the rudder blade. With a product diameter of ⌀100 mm and a weight of 0.20 kg, they provide reliable corrosion protection, ensuring the longevity of your vessel.
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€ 26,56
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1-2 weeks delivery time Talamex Magnesium Weld-On Hull Anodes are designed to offer reliable protection against corrosion in brackish and freshwater environments. With a focus on durability and effectiveness, these magnesium anodes provide optimal protection for your vessel, ensuring long-lasting performance in challenging conditions.
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€ 18,57
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1-2 weeks delivery time Talamex Magnesium Bolt-On Hull Anodes are designed for reliable corrosion protection in brackish and freshwater environments. With easy installation via a bolted connection, these anodes provide exceptional durability and performance.
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€ 34
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1-2 weeks delivery time The Osculati 43.908.10 magnesium anode (Aliscafi type) offers optimal cathodic protection for aluminum hulls and other submerged metal components in freshwater environments. Measuring 900 × 45 × 12.5 mm and weighing 850 g, this elongated anode is designed for easy installation on high-speed vessels or flat surfaces. Magnesium’s high electrochemical activity ensures superior performance where zinc or aluminum anodes may fall short. Ideal for preventing galvanic corrosion in lakes, rivers, and other low-conductivity waters.
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€ 55,72
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1-2 weeks delivery time The Osculati 43.919.03 bolt-on aluminium rudder blade anode has a 90 mm diameter and 170 g mass, designed for corrosion protection of medium-sized rudders, tabs, and submerged fittings. With a 17 mm profile and pre-drilled Ø31 mm and Ø8.5 mm holes, it offers fast installation and long-lasting performance in saltwater and brackish environments.
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€ 68,09
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1-2 weeks delivery time The Osculati 43.912.23 bolt-on magnesium anode is designed for maximum efficiency in freshwater and low-conductivity environments. Measuring 320 × 65 mm and weighing 700 g, it provides superior galvanic protection for hulls, rudders, and trim tabs. Magnesium’s high electrochemical activity makes it ideal for inland boats, outperforming both zinc and aluminium in lakes and rivers.
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€ 50,60
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1-2 weeks delivery time The Osculati 43.918.03 bolt-on magnesium anode, with a Ø110 mm diameter and 170 g weight, is engineered for optimal galvanic protection in freshwater conditions. Designed for rudders and trim tabs, it features pre-drilled mounting holes (Ø31 mm and Ø10.5 mm) and an 18 mm low-drag profile, making it ideal for light vessels operating in lakes and rivers.
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€ 15,03
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1-2 weeks delivery time The Osculati 43.918.00 magnesium rudder blade anode, with a compact Ø50 mm diameter and 20 g weight, is engineered for efficient protection in freshwater environments. Ideal for small vessels, this anode features a low-profile 11 mm thickness and pre-drilled Ø20 mm and Ø6.5 mm holes for fast bolt-on installation on rudders, tabs, or other submerged metal surfaces.
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€ 4,31
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1-2 weeks delivery time The Osculati 43.918.01 magnesium anode offers 60 g of efficient galvanic protection for rudders, tabs, and small underwater surfaces. With a 70 mm diameter, 13 mm profile, and pre-drilled Ø22 mm and Ø8.5 mm mounting holes, this compact bolt-on solution is perfect for boats operating in freshwater and low-conductivity environments.
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€ 5,98
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1-2 weeks delivery time The Osculati 43.918.02 magnesium rudder blade anode features a 90 mm diameter and 110 g weight, making it ideal for protecting submerged rudders, tabs, and other components on vessels operating in freshwater. Its high electrochemical activity outperforms zinc and aluminium in low-conductivity water, while pre-drilled mounting holes (Ø31 mm and Ø8.5 mm) enable fast, secure installation.
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€ 10,03
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1-2 weeks delivery time Round magnesium anode for hidden mounting, specifically engineered for freshwater environments. Osculati 43.918.48 has a 120 mm base diameter, 35 mm height, and weighs 550 g. Its concealed mounting design ensures a streamlined appearance while delivering effective corrosion protection for hulls and submerged structures.
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€ 71,19
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1-2 weeks delivery time Magnesium anode with hidden mounting system, ideal for vessels operating in freshwater. Osculati 43.918.47 features a 135 mm base diameter, 47 mm height, and weighs 980 g. The concealed installation ensures a smooth hull surface while providing high-efficiency protection for metal components submerged in low-conductivity water.
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€ 85,99
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1-2 weeks delivery time The Osculati 43.210.21 stern anode is manufactured from high-purity magnesium and offers superior galvanic protection for vessels operating in freshwater. With a compact diameter of 100 mm and height of 40 mm, this 510 g anode is optimized for high electrochemical efficiency. Alternative versions available in zinc (1.96 kg) and aluminium (770 g) for different water conditions.
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€ 59,49
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1-2 weeks delivery time The Osculati 43.210.22 magnesium anode is designed for freshwater stern protection and delivers high electrochemical performance. Weighing 750 g with dimensions Ø125 mm × 38 mm, it ensures optimal corrosion resistance for underwater components. Also offered in zinc (2.7 kg) and aluminium (1.10 kg) versions for other water types.
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€ 56,36
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1-2 weeks delivery time The Osculati 43.210.23 magnesium anode is engineered for stern-mounted corrosion protection in freshwater environments. With a 140 mm base diameter, 35 mm height, and weight of 830 g, it ensures high-efficiency galvanic shielding. Alternative versions available in zinc (3 kg) and aluminium (1.3 kg) for other water conditions.
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€ 59,01
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1-2 weeks delivery time The Osculati 43.902.15 Vetus-type oval anode is made from high-activity magnesium, optimized for corrosion protection in freshwater applications. Measuring 100 × 44 × 18 mm, it features a 48 mm mounting distance with Ø25 mm central hole and 10.5 mm slot. With a lightweight body and compact size, it is ideal for rudders, trim tabs, and other submerged fittings.
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€ 23,02
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1-2 weeks delivery time The Osculati 43.902.30 is a lightweight Vetus-type magnesium anode designed for use in freshwater environments. With a compact form factor of 150 × 60 × 25 mm and a weight of 250 g, it includes Ø27 mm and 11×15 mm mounting options with 80 mm spacing. Also available in zinc (1.0 kg) and aluminium (550 g) for alternative water types.
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€ 26,29
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1-2 weeks delivery time Magnesium weld-on anode by Osculati, model 43.908.02, weighs 1500 g and is designed for cathodic protection of metal structures in marine environments. Measuring 300 × 80 × 40 mm, it includes a 400 × 30 mm steel insert for welding. Ideal for protecting hulls, tanks, and piping in freshwater or low-conductivity water systems.
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€ 56,57
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How does a magnesium anodes for boats provide corrosion protection in fresh water?
Magnesium anodes provide effective corrosion protection for boats in fresh water environments. Due to their high electrochemical activity, magnesium anodes generate a higher driving voltage compared to zinc anodes or aluminum anodes, making them more suitable for the higher resistivity of fresh water. This increased activity ensures that the magnesium anode corrodes preferentially, safeguarding critical components such as the engine, drive, hull, and shaft from galvanic corrosion. It's important to note that while magnesium anodes are ideal for fresh water use, they are not recommended for saltwater environments, as they can corrode too quickly in such conditions.
How does the deposit of a magnesium anode change over time, and when should it be replaced?
Over time, a magnesium boat anode gradually dissolves as it sacrifices itself to protect metal components such as the magnesium hull, shaft, and rudder from corrosion. Anodes, including disc anodes and shaft anodes, should be inspected regularly for signs of significant depletion, typically when 50% or more of the anode has corroded. If the anode deposit becomes insufficient to provide cathodic protection, replacing it with a new magnesium anode kit is essential to maintaining effective corrosion resistance.
What is the difference between a hanging anode and a fixed anode in marine applications?
A hanging anode is a sacrificial anode that is suspended overboard using a cable, allowing it to provide temporary or additional corrosion protection for boats, docks, or other submerged structures. Fixed anodes, such as magnesium hull anodes or shaft anodes, are permanently mounted to specific areas of the boat, ensuring continuous cathodic protection. Hanging anodes are often used in freshwater boats or as a supplementary solution, while fixed anodes are an essential part of the vessel’s corrosion prevention system, designed to slow the rate of corrosion over time.
What types of Boat Zincs do you have in your catalog?
Boat Anodes, Anodes for Aluminium Boats, Boat Anodes for Saltwater, Marine Anodes, Vetus Anodes, Yacht Anodes, Magnesium Anodes for Boats