Anodes for Hull and Shaft

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 Hull / Shaft Anodes...
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Zinc Propeller / Shaft Anodes

Shaft Anodes / long Shaped, zinc
Product image of  Shaft Anodes / long Shaped, zinc
Shaft Anodes / long Shaped, zinc
from 38 61 €
(2)
4 variants
Shaft Anodes / long Shaped, zinc Preview image
Shaft Anodes / long Shaped, zinc Preview image
Zinc Collar Nut Shaft Anodes
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Zinc Collar Nut Shaft Anodes
from 10 88 € €14.16
(76)
8 variants
Zinc Collar Nut Shaft AnodesPreview image
Zinc Collar Nut Shaft AnodesPreview image
Zinc Collar Nut Shaft AnodesPreview image
-23%
Shaft zinc anodes, short version
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Shaft zinc anodes, short version
from 4 16 € €10.45
(45)
9 variants
-60%
Zinc Anode with Cutter SLC / 25 / 30 / 35 mm
Product image of  Zinc Anode with Cutter SLC / 25 / 30 / 35 mm
Zinc Anode with Cutter SLC / 25 / 30 / 35 mm
from 58 78 €
(30)
3 variants
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc Anode with Cutter SLC / 25 / 30 / 35 mmPreview image
Zinc anode - hat shape / conical
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Zinc anode - hat shape / conical
from 7 14 € €8.59
(3)
3 variants
Zinc anode - hat shape / conicalPreview image
Zinc anode - hat shape / conicalPreview image
-17%
Zinc Anode / conical external and internal
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Zinc Anode / conical external and internal
from 18 45 €
(14)
10 variants
Zinc anode - conical / hexagonal
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Zinc anode - conical / hexagonal
from 6 05 € €7.43
(5)
9 variants
-19%
Shaft and Propeller Anode / Zinc
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Shaft and Propeller Anode / Zinc
from 40 29 € €46.21
No rating yet
3 variants
-13%
Shaft and Propeller Anode / Zinc
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Shaft and Propeller Anode / Zinc
from 40 29 € €46.21
No rating yet
7 variants
-13%
Shaft and Propeller Anode / Zinc
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Shaft and Propeller Anode / Zinc
from 40 29 € €46.21
No rating yet
9 variants
-13%
Shaft and Propeller Anode / Zinc
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Shaft and Propeller Anode / Zinc
from 33 57 € €40.64
No rating yet
10 variants
-17%
Shaft and Propeller Anode / Zinc
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Shaft and Propeller Anode / Zinc
from 31 89 € €40.64
(5)
10 variants
-22%
Zinc Anode for Flexofold Propellers
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Zinc Anode for Flexofold Propellers
only 16 76 € €18.54
(2)
In stock
Zinc Anode for Flexofold PropellersPreview image
Zinc Anode for Flexofold PropellersPreview image
-10%
Zinc Anode for Gori Propellers 15'' - 16.5''
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Zinc Anode for Gori Propellers 15'' - 16.5''
only 10 04 €
(1)
In stock
Zinc Anode for Gori Propellers 15'' - 16.5''Preview image
Zinc Anode for Gori Propellers 15'' - 16.5''Preview image
Zinc Anode for Gori Propellers 15'' - 16.5''Preview image
Zinc Anode (triangular) for Gori Propellers 18'' - 20''
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Zinc Anode (triangular) for Gori Propellers 18'' - 20''
only 10 04 €
No rating yet
In stock
Zinc Anode (triangular) for Gori Propellers 18'' - 20''Preview image
Zinc Anode (triangular) for Gori Propellers 18'' - 20''Preview image
Zinc Anode (triangular) for Gori Propellers 18'' - 20''Preview image
NEW
Zinc Anode for Gori 2-Blade Saildrive Propeller / ring
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Zinc Anode for Gori 2-Blade Saildrive Propeller / ring
only 24 33 €
(2)
In stock
Zinc Anode for Gori 2-Blade Saildrive Propeller / ringPreview image
Zinc Anode for Gori 2-Blade Saildrive Propeller / ringPreview image
Zinc Anode for Gori 2-Blade Saildrive Propeller / ringPreview image
Zinc Anode for Gori 3-Blade Saildrive Propeller / ring
Product image of  Zinc Anode for Gori 3-Blade Saildrive Propeller / ring
Zinc Anode for Gori 3-Blade Saildrive Propeller / ring
only 24 33 €
(3)
In stock
Zinc Anode for Gori 3-Blade Saildrive Propeller / ringPreview image
Zinc Anode for Gori 3-Blade Saildrive Propeller / ringPreview image
Zinc Anode for Gori 3-Blade Saildrive Propeller / ringPreview image
Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / Saildrive / ring shaped
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Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / Saildrive / ring shaped
only 27 69 €
No rating yet
Only 5 in stock
Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / Saildrive / ring shapedPreview image
Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / Saildrive / ring shapedPreview image
Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / Saildrive / ring shapedPreview image
NEW
Zinc Anode for Gori 3-blade Folding Propeller Ø 15'' - 16'' / shaft system / ring-shaped
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Zinc Anode for Gori 3-blade Folding Propeller Ø 15'' - 16'' / shaft system / ring-shaped
only 27 69 €
No rating yet
In stock
Zinc Anode for Gori 3-blade Folding Propeller Ø 15'' - 16'' / shaft system / ring-shapedPreview image
Zinc Anode for Gori 3-blade Folding Propeller Ø 15'' - 16'' / shaft system / ring-shapedPreview image
Zinc Anode for Gori 3-blade Folding Propeller Ø 15'' - 16'' / shaft system / ring-shapedPreview image
NEW
Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / shaft system / ring-shaped
Product image of  Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / shaft system / ring-shaped
Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / shaft system / ring-shaped
only 29 37 €
(1)
Only 4 in stock
Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / shaft system / ring-shapedPreview image
Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / shaft system / ring-shapedPreview image
Zinc Anode for Gori 3-blade Folding Propeller Ø 18'' - 20'' / shaft system / ring-shapedPreview image
NEW
Alamarine Zinc Anode
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Alamarine Zinc Anode
from 6 68 € €7.88
No rating yet
3 variants
Alamarine Zinc AnodePreview image
Alamarine Zinc AnodePreview image
Alamarine Zinc AnodePreview image
Alamarine Zinc AnodePreview image
Alamarine Zinc AnodePreview image
Alamarine Zinc AnodePreview image
Alamarine Zinc AnodePreview image
-15%
Zinc Anode for Riva Boats
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Zinc Anode for Riva Boats
from 334 41 € €501.78
No rating yet
8 variants
Zinc Anode for Riva BoatsPreview image
Zinc Anode for Riva BoatsPreview image
-33%
FERRETTI, Zinc Anode
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FERRETTI, Zinc Anode
from 20 13 € €22.52
No rating yet
5 variants
-11%

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.

Table for calculating the required amount of anodes (in kg), depending on the corresponding 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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Stig M. on 25.10.2021

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