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Anodes

Anodes

Zinc Anodes with Straps
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-45%
Zinc Anodes with Straps
8.50 EUR €15.40 from €8.50
Zinc Anode / 1 kg
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-50%
Zinc Anode / 1 kg
17.95 EUR €36.24 only €17.95
Zinc Anode with Long Hole / 1.2 kg
Product image of Zinc Anode with Long Hole / 1.2 kg
-33%
Zinc Anode with Long Holes / 2.4 kg
Product image of Zinc Anode with Long Holes / 2.4 kg
-49%
Zinc Anode / 2.45 kg
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-51%
Zinc Anode / 2.45 kg
34.95 EUR €70.85 only €34.95
Zinc Hull Anodes, Flat Shape with Boreholes
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-36%
Zinc Double Anodes, round Shape
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Zinc Anodes for Aluminum Boats
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Zinc Anode Kits for Engines
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-6%
Shaft Anodes / long Shaped, zinc
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Zinc Collar Nut Shaft Anodes
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-34%
Zinc Collar Nut Shaft Anodes
12.95 EUR €19.52 from €12.95
Shaft zinc anodes, short version
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-49%
Shaft zinc anodes, short version
7.95 EUR €15.71 from €7.95
Zinc Anode with Cutter SLC / 25 / 30 / 35 mm
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Zinc anode - hat shape / conical
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-8%
Shaft and Propeller Anode / Zinc
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Shaft and Propeller Anode / Zinc
Product image of Shaft and Propeller Anode / Zinc
Shaft and Propeller Anode / Zinc
Product image of Shaft and Propeller Anode / Zinc
Shaft and Propeller Anode / Zinc
Product image of Shaft and Propeller Anode / Zinc
Shaft and Propeller Anode / Zinc
Product image of Shaft and Propeller Anode / Zinc
-9%
Shaft and Propeller Anode / Zinc
37.95 EUR €41.73 from €37.95
Alamarine Zinc Anode
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SARNICO Zinc Anode
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OPERA Zinc Anode
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OPERA Zinc Anode
547.95 EUR from €547.95
VERTIGO Zinc Anode
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Zinkanode FERRETTI
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FERRETTI, Zinc Anode
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-6%
FERRETTI, Zinc Anode
649.95 EUR €690.20 from €649.95
Ferretti Shaft and Propeller Anode / Zinc
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DOLCE VITA Zinc Anode
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-8%
DOLCE VITA Zinc Anode
199.95 EUR €216.54 only €199.95
SPLENDIDA 72 Zinc Anode
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ACQUAVIVA Zinc Anode
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-7%
ACQUAVIVA Zinc Anode
29.95 EUR €32.13 only €29.95
ZINC SAVER II Galvanic Isolator
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Drive Shaft Grounding
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Zinc Anode with 4 m Fastening Cable / 2.2 kg
Product image of Zinc Anode with 4 m Fastening Cable / 2.2 kg
-29%
Pin Zinc Anode for BUKH Engines DV10 - DV48
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Flat Aluminium Anodes
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Aluminium Anode
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-48%
Aluminium Anode
12.95 EUR €24.95 from €12.95
Aluminium Anodes, flat shape with drilling
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-38%
Aluminum Anode Kits for Engines
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Aluminium Shaft Anodes, Long Construction
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Magnesium Anode, Flat Shape with Drilling
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Round Magnesium Anodes
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Round Magnesium Anodes
12.95 EUR from €12.95
Magnesium Anodes / Teardrop
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Magnesium Anodes / Teardrop
19.95 EUR from €19.95
Magnesium Collar Nut Shaft Anodes
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Magnesium Anode Kits for Engines
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Magnesium Collar Nut Shaft Anodes
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Anodes

Typically anodes have to be replaced once per season. In harsh water conditions, a more frequent replacement schedule might be necessary. The 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. 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. The purpose of the sacrificial anode is to be dissolved. 
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 aluminum 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.
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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