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You are here: Chandlery > Hull Maintenance > Anodes for Boats > MG Duff ZD77 Pear Shaped Anode

MG Duff ZD77 Pear Shaped Anode

ItemPart NumberWeightStud DiameterHole Spacing Normal Price Online Price  
Pear Anode with backing pad and nuts ZD772kgM10200mm£42.70£38.43
Backing Pad for ZD77B77n/an/a200mm£2.00£1.80


The MG Duff ZD77 pear shaped zinc anode is ideal for protecting your boat during salt water use.
The ZD77 comes complete with backing pad, nuts and washers.
A set of 2 replacement bolts including nuts, washers and terminals is also available
When your boats hull is immersed in water, anodes protect the various metal components (propellor shaft, keel, rudder, engine) from the deterioration caused by galvanic corrosion.

Galvanic corrosion (also called electrolyte) is the deterioration of metal which occurs when dissimilar metals are joined together by a conductor in an electrically conductive fluid.
The least noble metal (the anode) dissolves while the most noble metal (the cathode) remains protected.
Zinc is the correct metal for salt water
Salt water: zinc anode 

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