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MGDUFF Zinc Boat Hull Anode ZD79
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MG Duff ZD79 Straight Zinc Hull Anode for Salt Waters (3kg / Bolt On)

Part No. 812003

€88.73 You pay €88.73 Incl VAT You pay €73.94 Excl VAT

RRP €101.12 €84.26

Save €12.39 (12.3%) Save €10.32 (12.3%)


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Brand MG Duff
Model ZD79
Construction Zinc
Style Straight Anode
Length Anode: 171mm, Overall: 229mm
Width 83mm (3-1/4"), Overall: 83mm (3-1/4")
Height 41mm (1.6"), Overall: 41mm (1.6")
Nominal Weight kg 3.0
Fixing Weld / bolt on, bolt points can be welded to fix to steel hulls
Bolt Centres 200mm (8")

MGDUFF ZD79 straight shaped zinc sacrificial hull anode, suitable for use in salt waters. Sacrificial anodes should be fitted and correctly bonded to all boats / vessels to help prevent corrosion by cathodic protection when in the water.

Cathodic protection is an electrochemical process which halts the natural reaction (corrosion) of metals in a particular environment by superimposing an electrochemical cell more powerful than the corrosion cell. Sacrificial anodes are fitted or bonded to the metal to be protected which in turn, as it has a greater electrical potential than the anode material, becomes cathodic and causes the anode to waste instead of itself.

All cathodic protection systems must be inspected annually and the sacrificial anodes renewed if more than 50% are wasted. You should check the working surface of the sacrificial anode to ensure that it is free of paint and chalky corrosion deposits. When fitting or replacing a sacrificial anode you should also replace the serrated fan disc washers under the nuts and change the anode backing sheet on wood and GRP hulls. Exposed fixing studs, nuts and washers should be well greased or painted after assembly.

MGDUFF Sacrificial Zinc Hull Anode

  • Bolt Size: 10mm (M10)

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