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 43.801.70 is a zinc low-profile ring anode designed for shafts with a 70 mm (2 3/4") diameter. Its slim 25 mm thickness is ideal for sailboats where installation space is limited. Supplied with integrated stainless steel pins and nuts, it provides secure mounting and long-term cathodic protection in saltwater environments, safeguarding critical underwater metal components.
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$ 126,57
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1-2 weeks delivery time The Osculati 43.801.25 is a compact zinc shaft anode with a 25 mm inner diameter, specially designed for sailboats with restricted installation space. With a low-profile thickness of 25 mm and supplied with stainless steel pins and nuts, this anode ensures solid mounting and effective corrosion protection in saltwater environments, preventing galvanic deterioration of shafts and related underwater components.
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$ 20,37
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1-2 weeks delivery time The Osculati 43.801.20 is a zinc shaft anode with a 20 mm (3/4") internal diameter and a compact 25 mm thickness, engineered for sailboats operating in saltwater where installation space is limited. It features stainless steel pins and nuts for secure and corrosion-resistant mounting, offering effective cathodic protection for small-diameter shafts and other critical submerged metal parts.
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$ 20,37
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1-2 weeks delivery time The Osculati 43.801.30 is a zinc shaft anode with a 30 mm internal diameter and a low-profile thickness of 25 mm, specially designed for sailboats where installation space is limited. Fitted with corrosion-resistant stainless steel pins and nuts, it provides reliable cathodic protection in saltwater environments, safeguarding shafts and other submerged metal components from galvanic corrosion.
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$ 20,37
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1-2 weeks delivery time The Osculati 43.801.40 is a zinc low-profile ring anode with a 40 mm internal diameter and 25 mm thickness, ideal for sailboats with limited clearance around the shaft. Made from high-purity zinc and supplied with stainless steel pins and nuts, it ensures secure installation and reliable cathodic protection in saltwater environments, effectively preventing galvanic corrosion of propeller shafts and nearby underwater metal fittings.
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$ 28,06
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1-2 weeks delivery time The Osculati 43.801.45 is a low-profile zinc anode with a 45 mm internal bore, engineered for sailboats with restricted installation space. Its 25 mm thickness and included stainless steel pins and nuts make it ideal for reliable sacrificial protection of propeller shafts and underwater metal parts in saltwater environments. A compact yet robust solution for long-term corrosion prevention.
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$ 28,06
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1-2 weeks delivery time The Osculati 43.801.50 is a zinc low-profile shaft anode with a 50 mm inner bore, engineered for sailboats operating in saltwater and featuring tight installation spaces. With a thickness of just 25 mm and stainless steel pins and nuts included, it offers secure attachment and consistent cathodic protection to prevent galvanic corrosion on propeller shafts and submerged metal components.
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$ 48,16
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1-2 weeks delivery time The Osculati 43.801.55 is a zinc low-profile shaft anode with a 55 mm internal bore and a 25 mm body thickness. Designed for sailboats with tight engine compartments or limited shaft clearance, it provides reliable sacrificial protection against galvanic corrosion. Supplied with stainless steel pins and nuts, it ensures secure and corrosion-resistant mounting in aggressive saltwater environments.
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$ 83,61
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1-2 weeks delivery time The Osculati 43.801.60 is a zinc shaft anode with a 60 mm internal bore and a slim 25 mm profile, ideal for installations on sailboats with restricted space around the propeller shaft. Engineered for use in saltwater, it provides reliable cathodic protection against galvanic corrosion. Stainless steel pins and nuts are included for a durable and secure installation.
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$ 96,26
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1-2 weeks delivery time The Osculati 43.801.22 is a zinc low ring anode with a 22 mm (7/8") internal diameter and a compact 25 mm thickness, designed for sailboats with minimal clearance around the shaft. It is made for saltwater use and includes stainless steel pins and nuts for a secure, corrosion-resistant installation. Ideal for protecting smaller shafts and submerged metal components from galvanic corrosion.
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$ 20,37
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1-2 weeks delivery time The Osculati 43.904.01 is a ZP-0 type aluminium anode with a mass of 200 g, designed for weld-on or bolted installation. With dimensions of 210 × 120 × 40 mm and a 22.5 mm tapered base, it offers versatile mounting on hulls, tanks, or other submerged metallic surfaces. Suitable for saltwater corrosion protection, the anode’s lightweight aluminium construction makes it especially effective for aluminum or high-performance marine structures.
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$ 26,77
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1-2 weeks delivery time The Osculati 43.904.00 is a ZP-0 zinc anode weighing 500 g, designed for welding or bolting onto submerged metal surfaces. With overall dimensions of 210 × 120 × 40 mm and a tapered 22.5 mm base, this anode is suitable for hulls, tanks, and structural components in marine environments. Its high-purity zinc composition offers reliable cathodic protection in saltwater, while its design allows piercing for bolted installation when welding is not preferred.
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$ 34,74
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1-2 weeks delivery time The Osculati 43.905.11 is a ZP-1 type aluminium anode designed for welding or bolting onto submerged metal surfaces. With a total weight of 390 g and dimensions of 230 × 160 × 57 mm, this tapered anode features a 25 mm base for efficient weld-on applications on curved or flat structures. It can also be pierced and bolted, providing installation flexibility. Ideal for corrosion protection in saltwater, particularly on aluminium hulls and lightweight marine structures.
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$ 39,46
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1-2 weeks delivery time The Osculati 43.905.00 is a ZP-1 model zinc anode designed for welding or bolting to hulls, tanks, or other submerged marine structures. With a weight of 1000 g and dimensions of 230 × 160 × 57 mm, it features a 25 mm tapered base for improved weld-on contact. It can also be pierced and bolted for flexible installation. Ideal for saltwater environments, the high-purity zinc construction ensures reliable cathodic protection over extended service periods.
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$ 41,95
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1-2 weeks delivery time The Osculati 43.911.10 is a ZP-2 model aluminium weld-on anode with a tapered design, measuring 430 × 280 × 98 mm and a 48 mm base thickness. Designed for saltwater protection of large hulls and submerged marine structures, it offers lightweight performance and superior corrosion resistance. The anode may also be pierced and bolted, allowing flexible installation in shipbuilding and heavy-duty retrofits.
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$ 114,65
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1-2 weeks delivery time The Osculati 43.911.00 is a ZP-2 zinc anode with a total weight of 5000 g and a tapered form measuring 430 × 280 × 98 mm with a 48 mm base thickness. Engineered for welding or piercing and bolting, this anode is ideal for protecting hulls, tanks, and large submerged marine structures from galvanic corrosion in saltwater. Its high mass ensures extended service life in demanding environments.
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$ 199,25
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1-2 weeks delivery time The Osculati 43.910.00 is a ZP-3 model weld-on zinc anode with a weight of 2000 g, measuring 250 × 135 × 87 mm and featuring a 35 mm tapered base. Designed for saltwater corrosion protection of hulls, tanks, and submerged marine structures, it can be welded directly to the surface or pierced and bolted, offering flexibility for both new installations and maintenance retrofits.
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$ 74,47
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1-2 weeks delivery time The Osculati 43.133.00 is a zinc pencil anode with dimensions 13 × 50 mm, designed specifically for use in BMW marine engine heat exchangers. It protects internal cooling passages from galvanic corrosion caused by saltwater contact. Compact and easy to replace, this anode threads directly into the heat exchanger body to provide continuous sacrificial protection.
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$ 19,68
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1-2 weeks delivery time The Osculati 43.229.01 is a zinc pencil anode designed for Bukh marine engine heat exchangers. Measuring Ø12 × 35 mm with Vok thread and M5 connection, it is threaded directly into the cooling system to provide essential sacrificial protection against galvanic corrosion. This anode is a maintenance-critical part for extending the life of internal components exposed to seawater inside the heat exchanger.
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$ 18,13
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1-2 weeks delivery time The Osculati 43.229.13 is a zinc pencil anode specifically designed for Caterpillar marine engines, replacing OEM part 116-7011. Measuring Ø9 × 35 mm with an additional 11 mm threaded section (1/4"), this anode provides essential sacrificial protection to the engine’s heat exchanger by neutralizing galvanic currents in the cooling circuit exposed to seawater.
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$ 22,86
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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.