Deleted
Deleted Member
Posts: 0
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Anodes
Jan 26, 2010 8:54:32 GMT
Post by Deleted on Jan 26, 2010 8:54:32 GMT
Hi All
I'm new to this so please excuse me if I get something wrong.
I'm bringing my Grand Banks 42 to Cardiff bay from a marina in salt water.
Does anyone know which type of anodes I need to use? At this moment I have normal zinc anodes. Will I need to change them to say aluminum?
I have only recently changed them, the cost to change them again is about £350 plus the lift out, all in all about £800
Kind regards
Paul
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Anodes
Jan 26, 2010 12:00:17 GMT
Post by allan on Jan 26, 2010 12:00:17 GMT
I had my boat out of the water last year and changed the anode. Before I did this I contacted McDuff to find out what they recommended. Their answer said that they were not sure what to recommend. They said that they had heard that salt levels in the bay were higher than originally thought. I doubt that myself, so went for aluminium with a magnesium lump to hang over the side when on the pontoon. Our pontoons do not have power, I believe that power on the pontoon makes things much worse. My boat spends a lot of time out of the bay, I sailed around 2000 miles last year and she was in Plymouth for a month, I think this is a factor too. Some boat rarely leave the bay and I think these should have freshwater anodes. These are just my thoughts, I'm sure others will have done the same research as me and come to different conclusions. Allan
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Viv
Member of CYC
Posts: 430
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Anodes
Jan 26, 2010 12:13:41 GMT
Post by Viv on Jan 26, 2010 12:13:41 GMT
We changed ours to freshwater anodes when Alana came down from Caernarfon to her home in the Bay in October 2007. She came out of the water in Feb/March 2009 and it was fine. We too heard that power on the pontoon makes things worse.
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Anodes
Jan 26, 2010 18:35:27 GMT
Post by alsybach on Jan 26, 2010 18:35:27 GMT
Hi All
many thanks for your thoughts, I've spoke to someone today about this.
He recommended that I leave my existing salt water anodes in place and hang magnesium anodes connected to my bonding system over the side whilst I'm in the bay.
I can see the logic of this as the zinc anodes will not work very well whilst I'm in fresh water but will normally when I'm in salt water, whereas the magnesium anode would disappear in no time in salt water but will be OK in fresh water. I can take the magnesium anodes in when i leave the berth.
I have a galvanic isolator on board so I don't get much trouble from stray currents from the marina electrical installation
How does that sound??
Regards
Paul
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Anodes
Jan 26, 2010 23:30:20 GMT
Post by allan on Jan 26, 2010 23:30:20 GMT
That sounds fine to me. If you can find a way to check your zinc anodes to ensure they do not get covered with the white deposits it would be even better. Sending a small child over the side will be fine for this task, if you have one! If there is some white deposits just give the kid a wire brush and a promise of a bit more pocket money and you should be fine. Allan
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