Thank you for your interesting video. Didn't know there are anodes for different waters. I have a question - is there such a thing as installing too many zinc anodes to cause damage instead of protection?
Hi Joseph, Yes! Having too many zinc anodes on a boat can actually be detrimental, particularly if your boat has a wooden or metal hull. Over zincing happens when there is too much anodic protection. Having an excessive number of sacrificial anodes installed on your boat can lead to unintended consequences. 1) Burnback and discoloration 2) Paint delamination and flaking 3) Caustic wood rot
@@Force4Chandleryltd Thank you so much. Incidentally, I found out a day ago from a video by Marine Surveys R. US. that it is the alkaline environment from too many anodes that damages fibers in wood. They did not elaborate on metal hull though. One other question that did arise from this is whether we need to connect the bonding system to the hull directly even if it is made of wood or fiberglass, i.e. not just to the metal through-hulls or engine, etc. Do we need to do that even though they are seemingly non-conductive?
Hello, So this required a big of digging - and what I would always suggest is you speak to an anode manufacturer to double check these things. M G Duff and Tecnoseal both have great technical teams to help advise you on such subjects. What we did find was this - "We do not recommend bonding a wooden hulled boat, but if you do, make sure the bonding system is insulated from contact with the wood. Any current flowing through the wood (especially if damp) causes rapid deterioration." - performancemetals.com/pages/why-bond-metal-parts-on-a-boat They also say - "It can sometimes be better to use bronze fittings which are naturally protected and do not require protection from an anode, particularly on a wooden hulled boat which can be damaged by the low voltage provided by the anode."
Can you weld an anode to the side of the boat rather than drilling a hole in the hull , worried about the seal failing and flooding my boat . Have a narrowboat , with four magnesium anodes ready to fit !
Hi Simon, thank you for your question. Yes we stock a range of weld on magnesium anode for freshwater use - these are very popular on Narrowboats www.force4.co.uk/item/M-G-Duff/MD73-Magnesium-Weld-On-Anode/CPO If there is anything else we can help you with please let us know.
Good video but it’s a shame it didn’t cover bolting the stud from the inside. Apart from an aside comment one might be led to believe that all you need is sikaflex !
Hi Kevin, thank you for your comment. We couldn't film the anode bolt from the inside as the bolt was under the engine with just enough room to get a spanner on the nut. The video does mention that you should use earth bonding wires to connect the anode to the shaft and gearbox.
The anode on this boat really was diminished - it definitely needed replacing
Thank you for your interesting video. Didn't know there are anodes for different waters. I have a question - is there such a thing as installing too many zinc anodes to cause damage instead of protection?
Hi Joseph,
Yes! Having too many zinc anodes on a boat can actually be detrimental, particularly if your boat has a wooden or metal hull.
Over zincing happens when there is too much anodic protection. Having an excessive number of sacrificial anodes installed on your boat can lead to unintended consequences.
1) Burnback and discoloration
2) Paint delamination and flaking
3) Caustic wood rot
@@Force4Chandleryltd Thank you so much. Incidentally, I found out a day ago from a video by Marine Surveys R. US. that it is the alkaline environment from too many anodes that damages fibers in wood. They did not elaborate on metal hull though. One other question that did arise from this is whether we need to connect the bonding system to the hull directly even if it is made of wood or fiberglass, i.e. not just to the metal through-hulls or engine, etc. Do we need to do that even though they are seemingly non-conductive?
Hello,
So this required a big of digging - and what I would always suggest is you speak to an anode manufacturer to double check these things. M G Duff and Tecnoseal both have great technical teams to help advise you on such subjects.
What we did find was this - "We do not recommend bonding a wooden hulled boat, but if you do, make sure the bonding system is insulated from contact with the wood. Any current flowing through the wood (especially if damp) causes rapid deterioration." - performancemetals.com/pages/why-bond-metal-parts-on-a-boat
They also say - "It can sometimes be better to use bronze fittings which are naturally protected and do not require protection from an anode, particularly on a wooden hulled boat which can be damaged by the low voltage provided by the anode."
@@Force4Chandleryltd Thank you so much. This is indeed a complicated subject.
Can you weld an anode to the side of the boat rather than drilling a hole in the hull , worried about the seal failing and flooding my boat . Have a narrowboat , with four magnesium anodes ready to fit !
Hi Simon, thank you for your question. Yes we stock a range of weld on magnesium anode for freshwater use - these are very popular on Narrowboats www.force4.co.uk/item/M-G-Duff/MD73-Magnesium-Weld-On-Anode/CPO
If there is anything else we can help you with please let us know.
Good video but it’s a shame it didn’t cover bolting the stud from the inside. Apart from an aside comment one might be led to believe that all you need is sikaflex !
Hi Kevin, thank you for your comment. We couldn't film the anode bolt from the inside as the bolt was under the engine with just enough room to get a spanner on the nut. The video does mention that you should use earth bonding wires to connect the anode to the shaft and gearbox.