- 13/05/2021 at 11:46 #24003Doug OdgersParticipant
I need to renew the anodes on A90’s rudder.
It seems the blade is made of aluminium.
Does this require any special anodes or is the ‘bog standard’ zinc laden sufficient?
- 17/05/2021 at 10:02 #24043AOAKeymaster
I think you want a magnesium anode rather than the more usual zinc. They make themy specifically for aluminium rudders as large diameter profiles discs.Ed.2/6/21 This response is incorrect, with apologies, as magnesium is freshwater use only. Large disc zinc anodes should be used.
Available from lots of places. E.g Force 4
- 17/05/2021 at 12:49 #24056Doug OdgersParticipant
Thank you for your excellent advice.
Good job I asked !
- 04/06/2021 at 14:14 #24098AOAKeymaster
Oh dear, I am really sorry to have misled you Doug. Dom is absolutely right. I allowed myself to become confused having just fitted magnesium to a boat on the broads. Looking again at photos of Helene’s rudder anode the apprear, as Dom says, standard zinc.
I have edited my original erroneous reply to avoid misleading anyone else in the future.
Nick, on the naughty step
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