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 43.919.03 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 The Osculati 43.910.01 is a general-purpose flat zinc anode designed for bolt-on installation on hulls, trim tabs, rudders, and other submerged metal components. Ideal for saltwater applications, it provides reliable galvanic protection and is easy to install using standard marine hardware.
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€ 85,41
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1-2 weeks delivery time The Osculati 43.912.01 is a 1300 g zinc anode with a flat 200 × 65 mm profile, designed for bolt-on installation on hulls, rudders, tabs, and brackets in saltwater environments. This robust sacrificial anode delivers reliable protection against galvanic corrosion for medium to large vessels and marine equipment operating in harsh offshore conditions.
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€ 32,75
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1-2 weeks delivery time The Osculati 43.912.03 bolt-on zinc anode, measuring 320 × 65 mm and weighing 2.2 kg, provides heavy-duty galvanic corrosion protection for hulls, rudders, trim tabs, and brackets in saltwater environments. Its flat profile and bolt-on design allow for fast, secure installation on medium to large vessels.
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€ 46,43
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1-2 weeks delivery time The Osculati 43.915.00 bolt-on zinc rudder anode with 110 mm diameter is designed for effective cathodic protection of rudder blades and other submerged metal parts. Manufactured from high-purity zinc for use in saltwater environments, it features a central bore of Ø31 mm and mounting holes Ø10.5 mm spaced to fit standard marine rudder systems. Weighing 680 g, it offers reliable long-term corrosion protection and easy installation.
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€ 18,69
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1-2 weeks delivery time The Osculati 43.915.02 zinc rudder blade anode is a bolt-on corrosion protection unit with a 125 mm diameter and 980 g weight, suitable for saltwater environments. It features a central bore of Ø31 mm and mounting holes of Ø10.5 mm. With a height of 21 mm, it is optimized for protecting marine rudder blades and other submerged metal parts from electrochemical damage.
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€ 27,16
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1-2 weeks delivery time The Osculati 43.915.03 bolt-on rudder blade anode features a robust zinc body with a 140 mm diameter and 1.45 kg weight, offering high-capacity cathodic protection in saltwater environments. It includes a 33 mm central hole and 12.5 mm mounting holes, with a total height of 30 mm. Designed for larger rudders and underwater structures, this anode ensures efficient mitigation of galvanic corrosion through simple bolt-on installation.
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€ 38,67
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1-2 weeks delivery time The Osculati 43.914.97 bolt-on rudder blade anode is a compact zinc sacrificial anode with a 50 mm diameter and 80 g weight, tailored for smaller marine rudders and submerged fittings. It includes a central hole of 20 mm and two mounting holes of 6.5 mm. At just 11 mm high, it's an ideal choice for small boats requiring reliable cathodic protection in saltwater environments.
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€ 5,93
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1-2 weeks delivery time The Osculati 43.914.98 bolt-on rudder blade anode is a medium-sized sacrificial zinc anode with a 70 mm diameter and 190 g weight, designed to protect underwater metal parts such as rudders and trim tabs in saltwater environments. It features a 22 mm center hole and 8.5 mm mounting holes, with an overall height of 13 mm, making it suitable for small to mid-sized boats requiring reliable galvanic corrosion protection.
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€ 10,16
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1-2 weeks delivery time The Osculati 43.914.99 bolt-on rudder blade anode is a precision-engineered zinc sacrificial anode with a 90 mm diameter and 420 g mass, intended to provide consistent and long-lasting cathodic protection for rudders and submerged metallic structures in saltwater environments. It features a central bore of 31 mm and 8.5 mm twin mounting holes. With a profile height of 17 mm, it is optimized for medium displacement vessels exposed to high salinity and electrochemical gradients.
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€ 11,37
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1-2 weeks delivery time The Osculati 43.901.01 is a circular aluminium anode with a 78 mm diameter and 450 g weight, designed for single-bolt mounting on underwater metal components such as rudder blades, shafts, and trim tabs. With a 45 mm height and constructed from a high-performance aluminium alloy, this anode is ideal for salt and brackish water use, offering lighter weight and longer service life compared to zinc alternatives.
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€ 12,04
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1-2 weeks delivery time The Osculati 43.901.01 is a circular aluminium anode with a 78 mm diameter and 450 g weight, designed for single-bolt mounting on underwater metal components such as rudder blades, shafts, and trim tabs. With a 45 mm height and constructed from a high-performance aluminium alloy, this anode is ideal for salt and brackish water use, offering lighter weight and longer service life compared to zinc alternatives.
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€ 32,54
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1-2 weeks delivery time The Osculati 43.251.51 is a combined Eliche Radice-style propeller nut and aluminium sacrificial anode designed for shaft diameters of 20, 22, or 25 mm. It features a 16×1.5 mm thread and a brass internal hex socket for easy installation and secure fastening. This integrated design provides both mechanical retention and corrosion protection for marine propeller assemblies operating in saltwater.
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€ 45,07
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1-2 weeks delivery time The Osculati 43.251.52 is a combined Eliche Radice-type propeller nut and aluminium anode, designed specifically for 30 mm shaft diameters with a 20×1.5 mm thread. Featuring a corrosion-resistant brass internal hex socket and a high-performance aluminium sacrificial body, it ensures both secure propeller fixation and long-term electrochemical protection in marine saltwater environments.
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€ 55,76
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1-2 weeks delivery time The Osculati 43.251.53 is an aluminium anode combined with a propeller nut designed for 35 mm diameter shafts using a 24×2 mm thread. Featuring a brass internal hex socket for secure and precise installation, this unit provides dual functionality—mechanical locking of the propeller and galvanic corrosion protection for the shaft and propeller hub in salt and brackish water conditions.
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€ 77,44
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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.