MG Duff Zinc Shaft Collar Anodes

For propeller and shaft protection on small commercial and pleasure craft.
Easily fitted and replaced.
Without inserts.
Order by shaft diameter.
Anodes protect the various metal components ( propeller, shaft, keel, rudder, engine) from deterioration caused by galvanic corrosion when your boat’s hull is submerged.
Galvanic corrosion 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.
Anodes deterioration must be monitored carefully and replaced every year when doing the antifouling/launching or when the anode is 75% dissolved.
The choice of anode depends of the nature of the water:
Saltwater = Zinc Anodes
Freshwater = Magnesium Anodes
Brackish Water = Aluminium Anodes