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 43.908.10 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 43.803.26 aluminium shaft collar anode is engineered for sailboats with limited clearance around the propeller shaft. Designed to fit 1" (25.4 mm) shafts, this compact anode has a 25 mm thickness and features pre-installed stainless steel pins and locking nuts for secure attachment. Its low-profile shape makes it ideal for confined spaces while ensuring reliable cathodic protection of metal components in saltwater environments.
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€ 10,68
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1-2 weeks delivery time Designed for sailboats with limited clearance around the propeller shaft, the Osculati 43.803.35 aluminium shaft collar anode fits 1" 3/8 (35 mm) shafts and provides effective corrosion protection in saltwater environments. Its low-profile 25 mm thickness and integrated stainless steel pins and nuts allow secure and compact installation in tight marine spaces. Ideal for vessels where space efficiency and reliable electrochemical defense are crucial.
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€ 12,04
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1-2 weeks delivery time The Osculati 43.803.25 aluminium shaft collar anode is purpose-built for sailboats with limited shaft space. Designed for 25 mm diameter shafts and featuring a compact 25 mm thickness, it provides essential galvanic protection in saltwater environments. Supplied with stainless steel pins and locking nuts, this low-profile anode ensures a secure fit and long-lasting corrosion defense where clearance is minimal.
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€ 10,05
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1-2 weeks delivery time Specifically designed for sailboats with limited clearance around the propeller shaft, the Osculati 43.803.20 aluminium shaft collar anode fits 3/4" (19 mm) shafts. With a low-profile 25 mm thickness and marine-grade aluminium construction, it delivers reliable galvanic protection in saltwater environments. The unit includes stainless steel pins and nuts for secure mounting in tight spaces.
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€ 11,19
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1-2 weeks delivery time Engineered for use in confined marine shaft spaces, the Osculati 43.803.30 aluminium shaft collar anode fits 30 mm diameter shafts and offers a low-profile design with a 25 mm thickness. Ideal for sailboats and compact engine rooms, it ensures efficient galvanic protection in saltwater conditions. Supplied with stainless steel pins and nuts, the anode is easy to install and secure in tight locations.
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€ 12,04
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1-2 weeks delivery time The Osculati 43.803.40 aluminium shaft collar anode is tailored for 40 mm shafts in sailboats where space around the shaft is limited. Its 25 mm low-profile design makes it ideal for confined installations while providing effective saltwater corrosion protection. Supplied with stainless steel pins and nuts, it ensures a durable and secure fit on any compact shaft layout.
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€ 13,29
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1-2 weeks delivery time The Osculati 43.803.45 is a low-profile aluminium shaft collar anode designed to fit 45 mm shafts in confined spaces commonly found on sailboats. With a slim 25 mm thickness and corrosion-resistant stainless steel pins and nuts included, it ensures effective galvanic protection and a secure, compact installation on shafts operating in saltwater environments.
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€ 14,91
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1-2 weeks delivery time The Osculati 43.803.50 aluminium shaft collar anode is designed for 50 mm shafts and is ideal for confined marine installations, particularly on sailboats. With a slim 25 mm thickness and a low-profile shape, this anode ensures efficient galvanic protection in saltwater. Stainless steel pins and nuts are included for secure, corrosion-resistant mounting in compact shaft areas.
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€ 16,98
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1-2 weeks delivery time The Osculati 43.803.22 is a compact aluminium shaft collar anode designed for 7/8" (22 mm) shafts. Its 25 mm low-profile thickness makes it ideal for sailboats with minimal clearance around the shaft. Built for saltwater environments, it provides efficient galvanic protection and comes equipped with stainless steel pins and nuts for a secure, corrosion-resistant installation.
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€ 11,53
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1-2 weeks delivery time The Osculati 43.651.02 Arneson transmission anode is a 610 g aluminium version engineered to protect propulsion systems from galvanic corrosion. Designed for use with Arneson surface drive units, this lightweight anode provides superior performance in saltwater environments where aluminium is preferred over zinc. It ensures efficient sacrificial protection with minimal drag impact on high-speed craft.
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€ 57,55
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1-2 weeks delivery time The Osculati 43.910.11 is a versatile bolt-on aluminium anode designed for general-purpose cathodic protection on hulls, trim tabs, rudders, and other submerged metal components. Manufactured from high-purity aluminium for superior performance in saltwater and brackish conditions, this anode is ideal for vessels requiring a flat-mount, replaceable corrosion protection solution.
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€ 63,82
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1-2 weeks delivery time The Osculati 43.912.11 aluminium anode measures 200 × 65 mm and weighs 650 g, offering efficient bolt-on corrosion protection for hulls, rudders, trim tabs, and brackets. Engineered for marine environments, it outperforms traditional zinc anodes in saltwater and brackish conditions, with easier handling and better environmental compliance. Ideal for boats requiring compact, replaceable surface-mounted anodes.
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€ 23,32
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1-2 weeks delivery time The Osculati 43.912.13 bolt-on aluminium anode offers 1000 g of sacrificial protection for marine hulls and metal components exposed to saltwater and brackish environments. Measuring 320 × 65 mm, it delivers effective performance equivalent to 2.2 kg zinc, while offering lower weight and enhanced environmental compliance. Ideal for trim tabs, rudders, and underwater brackets.
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€ 36,50
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1-2 weeks delivery time The Osculati 43.919.04 is a round, bolt-on rudder blade anode with a 110 mm diameter and 270 g aluminium mass, designed to protect underwater steering components from galvanic corrosion. With integrated mounting holes and a slim 18 mm profile, this compact anode is ideal for rudders and trim tabs on both recreational and commercial vessels operating in saltwater and brackish environments.
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€ 13,22
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1-2 weeks delivery time The Osculati 43.919.05 is a round, bolt-on aluminium anode with a Ø125 mm diameter and 390 g weight, engineered for rudders, trim tabs, and underwater plates. With stainless-friendly aluminium construction and a 21 mm profile, it delivers efficient saltwater corrosion protection for mid-sized marine vessels. Features pre-drilled mounting holes for fast, tool-free installation.
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€ 20,17
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1-2 weeks delivery time The Osculati 43.919.06 is a high-efficiency aluminium rudder blade anode with a 140 mm diameter and 570 g weight. Designed for use on rudders, trim tabs, and hull-mounted fittings, this round anode provides reliable saltwater protection and features pre-drilled Ø33 mm and Ø12.5 mm mounting holes for easy bolt-on installation. Its robust 30 mm profile ensures extended service life for medium to large vessels.
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€ 26,89
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1-2 weeks delivery time The Osculati 43.919.01 is a compact aluminium rudder blade anode with a 50 mm diameter and 30 g mass, ideal for protecting small rudders and underwater fittings on light vessels operating in saltwater or brackish water. Its slim 11 mm profile and Ø20/6.5 mm pre-drilled holes make for fast, secure installation in tight spaces.
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€ 3,34
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1-2 weeks delivery time The Osculati 43.919.02 is a compact, round aluminium anode with a 70 mm diameter and 80 g weight, engineered for bolt-on protection of rudders, trim tabs, and other small submerged surfaces. Its lightweight design and Ø22/8.5 mm mounting holes ensure fast installation and reliable corrosion protection in saltwater and brackish environments.
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€ 5,58
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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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€ 9,50
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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.