Anodes Cardiff bay

[single]

Messing about with anodes, i ended up fitting ally this year but i have since been told magnesium is the best? I know zinc are no good but how are others getting on? The boat is in the bay water for about 80% of the year.

 

[chrishelen]

I think the 'aqua buses' use magnesium. They never leave thebay .

 

[bitbaltic]

Magnesium. We only have a saildrive anode and replace it every year. The boat is moored in the bay and realistically the amount of time it spends out of freshwater when at sea is pretty immaterial. Unless you are going to cruise extensively you probably should go for a freshwater rather than saltwater setup.

 

[Allan]

My boat spends most of the time in the bay and extended time in salt water. I use a zinc anodes on the hull and prop shaft then add a magnesium anode over the side when on the mooring. I think it is moor important if there is mains on nearby pontoons.
Allan

 

[pondfish]

Allan if you use zinc in the bay the fresh water will build a white crust over them making them useless when you go out into salt water they wont work,
Your better off putting magnesium and ally next time you lift it out,

 

[RAP77]

I have my boat in Cardiff for the winter. I asked MG Duff (the anode people) about what anode to use. This is their reply.

"The correct anode material for fresh water is magnesium and for salt water it is zinc. The only anode material that works in more than one water type is Aluminium, which works in both salt and brackish water. Aluminium will not work in truly fresh water. Usually you would choose the anode material to suit where the vessel is moored, as this is where the vessel will spend the majority of its time during the year.

I would agree that using a magnesium hanging anode to protect your metalwork whilst moored in fresh water would be a great solution to the expense of a lift out."

I have hung a magnesium anode over the stern and connected it to to the bonding circuit.