Anodes for Hull and Shaft

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Logo of QUICK
QUICK Nautical Equipment - Made in Italy since 1992 In 1996, QUICK launched the first windlass with ARIES. Today, SVB offers a wide range of different QUICK windlasses with various features. Since 1998 hot water boilers and heating elements in various volumes followed by bow thrusters and on-board electrical systems, such as battery chargers or remote controls, have been added to the QUICK portfolio. The windlass, bow thruster, keel hydraulics and gangway can be controlled by means of the practical hand-held remote control.
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Logo of SIDE-POWER
Bow thrusters from SIDE-POWER guarantee reliable operation even after years. The high standard of materials, accessories and services has already convinced several tens of thousands of customers, including many well-known original equipment manufacturers. The standard equipment already includes many thoughtful details, such as a generously sized electric motor with thermal protection, noise Q-propeller with a lot of power, galvanic isolation between the engine and transmission, electronic delay in case of a sudden change in thrust direction, switch panel with time-controlled shut-off and pre-wired control cables.
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Logo of LEWMAR
Lewmar has been developing innovative and reliable marine products since 1946, allowing you to enjoy a stress-free time on the water. With its extensive range of anchors and windlasses, hatches & portlights, winches and hardware, Lewmar offers complete solutions for small charter boats and mega yachts alike. Production takes place in their own production facilities in the UK, forming the basis for the high quality standard of all Lewmar products.
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Logo of MERCURY
Known worldwide as a manufacturer of reliable outboards, Mercury has been producing marine propulsion systems since 1939. In 1930, when Mercury founder Carl Kiekhaefer and his team of passionate boaters built the first Mercury engine in an old barn, he laid the foundation for the continued production of high-performance marine engines. In 1940, the newly founded company presented its first engine range, which included 5 engine models, at the New York Boat Show.
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Logo of VETUS
VETUS is a developer, manufacturer and commercial enterprise for marine engines, generators and technical equipment on board of pleasure craft and small commercial vessels. The company was founded in 1964 by Dutchman, William Henry den Ouden.
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Usually anodes need to be changed once a season, and even more frequently in rough waters. The required material of the anode depends on the material of the boat and the sailing area. You can choose between zinc, magnesium and aluminum anodes. Sacrificial anodes must never be painted over, brushed off or lubricated. Learn more about Anodes...
Anodes

Hull / shaft anodes

- Protect your boat with sacrificial anodes -

What are sacrificial anodes?

Sacrificial anodes are metals or alloys that have a more anodic, i.e. less noble, potential than steel and are used against corrosion. The less noble material of the anode "sacrifices" itself and dissolves, thus protecting the hull and the parts of the boat that are susceptible to corrosion. If the anodes don't show any signs of dissolving after a while, something might be wrong. Something is always getting dissolved. If the sacrificial anodes are not attacked by corrosion, another area is probaly affected by corrosion.

Where should anodes be mounted?

Anodes are mounted along the keel. The electric current is higher at the stern post due to the propeller being located there. It is advisable to install several anodes in this area. Anodes should also be mounted on the rudder and propeller shaft.

How often must anodes be changed?

Typically, anodes have to be replaced once per season. In harsh water conditions, a more frequent replacement schedule might be necessary. 

Which anode for which material and which water?

For the protection of hulls, engines and outboard motors made from aluminium alloys, zinc anodes are commonly used in salt- and brackish water. In fresh water conditions, magnesium anodes are commonly used. For hulls and other underwater parts made from steel, brass or bronze, zinc anodes may be used. However, they tend to be replaced more frequently than aluminium anodes due to the fact that zinc anodes always contain a small percentage of the toxic heavy metal cadmium. This is also why aluminium anodes are considered to be a lot more environmentally friendly. Moreover, aluminium anodes are more efficient, longer-lasting and recommended for usage in brackish waters or when going back and forth between salt and freshwater.

Can sacrificial anodes lose their effect?

Anodes must never be painted or lubricated! This is because they would lose their electrical conductivity with water and thus, they will not be able to properly prevent corrosion. If a boat stays on land for a long period of time, some layers of oxidation (especially in the case of aluminium anodes) might prevent them from functioning properly, as the potential difference might be too low.

Amount of anodes (in kg) required per unprotected metal surface:

Metal surfaces in m2 / zinc anodes in kg
5 to 10 m2 / 5.5 kg
10 to 20 m2 / 9.5 kg
20 to 30 m2 / 18.0 kg
30 to 40 m2 / 20.0 kg
40 to 50 m2 / 25.0 kg

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Customer ratings & reviews

All reviews (153.144)
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Michael G. on 11.04.2024

Better price for the same goods in the UK by far. Thanks.

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Petr M. on 11.04.2024

Always perfect.

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ANTONIO M. on 10.04.2024

Very easy to order