MGDuff AD79 Aluminium Anode



The MGDuff AD79 Zinc Anode 1.5Kg is for fresh water use only and can be used on steel or plastic hulls. Contact us for information on wood or aluminium hull protection.

MGDuff Anodes divert the corrosive process away from the metal components of a boat or structure and onto the sacrificial anodes. These are attached to the metal components of a boat or structure and, because they are made of a metal higher placed in the galvanic series, they attract corrosion and protect against damage.

Weight: 1.5kg
Overall Length: 229mm
Anode Body Length: 171mm
Width: 83mm
Depth: 41mm
Stud Size: 10mm
# of Fixing Holes: 2
Fixing Hole Details: 19mm x 11mm fixing holes at 200mm / 8" hole centres

1. Choose your material:
- Zinc for saltwater boats
- Aluminium anodes for saltwater or brackish waters
- Magnesium for fresh water
2. Select Style and Model:
- Bolt-on hull anodes come with 8" or 9" hole centres (You have to buy the studs or bolts separately) weld-on requires the anode to be welded in place (usually commercial vessels)
- There are different models of anode depending on where you put it. Shaft and beneteau anodes protect the drive shaft and stern tube. Hull anodes can be placed anywhere depending on where you want to protect and pencil/engine anodes tend to be specially designed for each brand and model engine. Button or disc anodes are designed to protect rudder / trim tabs.

*For more information on placement or engine anodes please contact us on 00353 28 23190.

**With regard to steel boats, it is vital that special attention is paid to areas around the water line. These are particularly vulnerable but receive no protection from anodes above the water line.

***All MGDuff anodes will suit wood, GRP or steel hulls. For aluminium hull anodes please contact one of our branches.
Do not mix and match aluminium, zinc or magnesium anodes on the same boat.


Composition (weight %)
Iron Fe 0.12 max. 
Silicon Si 0.05 - 0.15 
Copper Cu 0.003 
Zinc Zn 3.0 - 6.0 
Indium In 0.015 - 0.030 
Mercury Hg 0.001 max. 
Titanium Ti 0.025 max. 
Aluminium Al Remainder

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