Zinc anodes for boats, also known as marine zinc anodes or boat anodes, are sacrificial metal components used to protect the hull and underwater metal parts of boats and yachts from corrosion caused by galvanic currents in seawater.
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1-2 weeks delivery time The Osculati 43.902.10 aluminium oval anode is a compact Vetus-type unit ideal for localized protection of underwater metals. With a streamlined form factor of 100 × 44 × 18 mm, this model is suited for rudders, trim tabs, and small hull fittings. Designed for saltwater or brackish applications, it offers a lightweight aluminium option to traditional zinc units.
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$ 25,55
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1-2 weeks delivery time The Osculati 43.902.20 is a Vetus-type oval aluminium anode weighing 550 g, specifically designed for marine cathodic protection in saltwater and brackish environments. With dimensions of 150 × 60 × 25 mm and 80 mm mounting distance, it includes a Ø27 mm center hole and 11×15 mm bolt slots. Also available in zinc (1.0 kg) and magnesium (250 g) variants.
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$ 42,81
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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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$ 34,53
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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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$ 70,08
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1-2 weeks delivery time The Osculati 43.902.01 is a Vetus-type zinc anode with a solid 2300 g weight, designed for reliable galvanic protection in saltwater environments. Its rectangular body measures 247 × 63 × 30 mm and includes mounting holes Ø32 mm and 13×25 mm slots spaced 140 mm apart. Also available in aluminium (1.07 kg).
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$ 107,62
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1-2 weeks delivery time The Osculati 43.902.11 Vetus-type anode is made of high-purity zinc and weighs 2700 g. With dimensions 290 × 53 × 33 mm and mounting slot spacing of 200 mm, it is ideal for cathodic protection of hulls, brackets, or stern fittings in saltwater environments. Fitted with Ø32 mm and 13×25 mm mounting holes. No aluminium version available.
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$ 118,05
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1-2 weeks delivery time The Osculati 43.902.02 Vetus-type zinc anode offers 4500 g of high-purity sacrificial mass, ensuring maximum protection for hulls and underwater metal structures in saltwater environments. With dimensions of 350 × 68 × 36 mm and 200 mm mounting slot spacing, it features Ø38 mm and 13×25 mm mounting options. Aluminium version also available at 1.76 kg.
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$ 200,96
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1-2 weeks delivery time The Osculati 43.902.05 Vetus-type edged zinc anode provides 1000 g of high-purity zinc for stern, hull, or bracket protection in saltwater environments. Measuring 152 × 52 × 23 mm with reinforced side edges (B: 68 mm, H1: 29 mm), it includes Ø11 mm and 11×15 mm bolt slots spaced 80 mm apart. Aluminium version also available (390 g).
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$ 69,27
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1-2 weeks delivery time The Osculati 43.902.06 Vetus-type zinc edged anode weighs 2400 g and is engineered for robust protection of hulls and underwater fittings in saltwater environments. With dimensions of 250 × 55 × 21 mm and 140 mm mounting slot spacing, it features Ø11 mm and 11×15 mm holes, plus reinforced edges (B: 75 mm, H1: 37 mm). Also available in aluminium (940 g).
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$ 139,21
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1-2 weeks delivery time The Osculati 43.902.26 is a Vetus-type aluminium edged anode with a weight of 940 g, designed for effective corrosion protection of hull-mounted and underwater components in saltwater or brackish conditions. With dimensions 250 × 55 × 21 mm, reinforced edges, and dual mounting formats (Ø11 mm and 11×15 mm) spaced 140 mm apart, this model offers secure fitment and long-lasting performance. Also available in zinc (2.40 kg).
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$ 103,81
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1-2 weeks delivery time The Osculati 43.902.00 is a Vetus-type oval zinc anode weighing 1000 g, designed to protect submerged components in saltwater. With dimensions 150 × 60 × 25 mm, it features dual mounting options (Ø27 mm and 11×15 mm slots) spaced 80 mm apart. Also available in aluminium (550 g) and magnesium (250 g) for different water conditions.
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$ 44,36
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1-2 weeks delivery time The Osculati 43.901.99 Vetus-type zinc anode weighs 300 g and is designed for compact saltwater protection of rudders, tabs, or hull fittings. Measuring 100 × 44 × 18 mm with 48 mm mounting spacing, it includes a Ø25 mm center hole and 10.5 mm slot. Lightweight and efficient for localized protection.
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$ 30,55
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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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$ 124,15
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1-2 weeks delivery time Osculati magnesium weld-on anode 43.908.05 is a high-capacity 2500 g sacrificial block designed to protect large metal surfaces in contact with freshwater. Measuring 320 × 147 × 38 mm and equipped with a 400 × 30 mm steel insert, it provides excellent corrosion resistance for hulls, tanks, or submerged structures in low-conductivity environments.
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$ 174,85
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1-2 weeks delivery time The Osculati 43.908.06 is a high-efficiency weld-on magnesium anode designed for cathodic protection in fresh water environments. With a total weight of 4000 g and dimensions of 400 × 152 × 33 mm, it features a 550 × 40 mm insert with 4 welded attachment points for secure and durable installation on steel hulls, tanks, or marine structures. Its sacrificial design offers superior corrosion protection for submerged metal components.
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$ 241,53
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1-2 weeks delivery time The Osculati 43.901.00 is a circular zinc anode with a single-bolt mounting system, designed for effective cathodic protection in seawater. With a diameter of 78 mm, a height of 45 mm, and a mass of 1050 g, it offers optimal protection for submerged metallic components such as shafts, rudders, or hull fittings. The single-bolt design simplifies installation and ensures secure contact with the protected surface.
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$ 65,50
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1-2 weeks delivery time The Osculati 43.801.32 is a low-profile zinc ring anode with a 31.8 mm (1 1/4") shaft hole, designed specifically for sailboats with limited clearance around the propeller shaft. Made from high-purity zinc, it includes stainless steel fasteners (pins and nuts) for secure installation. With a compact thickness of 25 mm, it fits easily in tight spaces while providing effective cathodic protection in seawater environments.
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$ 20,37
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1-2 weeks delivery time The Osculati 43.801.26 is a zinc low-profile ring anode with a 25.4 mm (1") shaft hole, engineered for sailboats where space around the shaft is limited. With a thickness of just 25 mm, it ensures effective cathodic protection without interfering with nearby components. Equipped with stainless steel pins and nuts for secure and corrosion-resistant attachment, it’s ideal for protecting propeller shafts in saltwater.
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$ 20,37
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1-2 weeks delivery time The Osculati 43.801.38 is a compact zinc ring anode with a 38 mm (1 1/2") internal bore, designed for sailboats with limited shaft clearance. Built from high-purity zinc for seawater applications, it features a low profile of 25 mm and is fitted with stainless steel pins and nuts for a secure, corrosion-resistant mount on propeller shafts and similar submerged parts.
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$ 26,11
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1-2 weeks delivery time The Osculati 43.801.35 is a zinc shaft anode with a 35 mm (1 3/8") inner bore and a low-profile thickness of 25 mm, designed specifically for sailboats operating in seawater with restricted space around the shaft. Supplied with stainless steel pins and nuts for secure mounting, this anode provides reliable sacrificial protection for propeller shafts and submerged drive components in compact installations.
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$ 20,37
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How do zinc anodes protect marine engines and outboard motors from corrosion?
Zinc anodes, also known as sacrificial anodes, protect marine engines and outboard motors by corroding in place of more important metal parts, such as the hull or outboard components. By attaching hull zinc anodes or trim tab anodes, the less noble zinc metal is sacrificed when placed in an electrolyte solution like saltwater, preventing corrosion of the engine and other vital boat components. Other anodes, like aluminum and magnesium, are also used based on the water type, but zinc remains the popular choice for saltwater environments due to its effective corrosion prevention.
The right choice of marine anodes, whether zinc, aluminum, or magnesium, can greatly extend the lifespan of your boat and its components. Products like the boat lift zinc anode and trim tab anode help protect specific areas from galvanic corrosion. Using high-quality anodes at unbeatable prices is a smart investment for boaters who want to store their boat safely and protect outboard engines and other critical parts. Even components like 316 stainless steel cables benefit from reduced exposure to corrosive damage when effective sacrificial anodes are in place.
How do aluminum, zinc, and magnesium anodes differ in protecting a boat?
Aluminum, zinc, and magnesium anodes all serve as sacrificial metals to protect boats from corrosion, but they perform differently based on the environment. Zinc anodes are commonly used in saltwater, whereas aluminum anodes offer versatility for both salt and brackish water, providing more efficient protection due to their lighter alloy composition. Magnesium anodes are best suited for freshwater applications as they are a more reactive, "less noble" metal, ideal for preventing corrosion in low salinity environments, such as lakes and rivers.
Why is anode placement on the hull plate important for effective corrosion protection?
Proper placement of boat zinc anodes on the hull plate is crucial for effective corrosion protection, as it ensures the sacrificial zinc can adequately neutralize galvanic currents and protect vulnerable metal areas. Anodes like martyr anodes, rudder zincs, and plate zinc are strategically placed to cover high-risk spots on a metal boat, preventing corrosion from spreading. Using a zinc anode kit helps streamline the placement process, ensuring a comprehensive approach to corrosion protection for your boat and its underwater components.
For a complete corrosion prevention solution, explore our Anodes for Aluminium Boats, designed for maximum durability and efficiency.
Are there any specific maintenance practices for prolonging the lifespan of marine fuel pumps?
Regularly changing the boat motor fuel filter is essential to prevent contaminants from reaching the fuel pump, ensuring its longevity and optimal performance. Additionally, keeping the entire fuel system clean and free from debris is crucial in maintaining the efficiency of the marine fuel pump, which plays a vital role in supplying clean fuel to the engine.
For enhanced protection against corrosion in saltwater environments, consider installing Boat Anodes For Saltwater.