claymore
Well-Known Member
Came across these whilst buying a replacement anode. Does anyone use them and what difference do they make?
Sacrificial Anode foam backing pad
- Thread starter claymore
- Start date
fluffc
Well-Known Member
They prevent damage to your hull...
claymore
Well-Known Member
Not sure how - if the anode is bolted on to the same place and isn't jiggling around, what damage would it do anyway?
cliff
Well-Known Member
If fitted properly it stops the flow of water across the back of the anode and prevents wastage in that area and subsequent loosening/loss of the anode.
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"Artificial intelligence is no match for natural stupidity"
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tcm
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tightwad anode options and strategy
It's useful to stop or slow erosion of the back of the anode, partly to stop it loosening the anode and also any damage half-eroded anode might do to the hull.
You can save the cost of backing sheet by painting the back of the anode with antifoul or smearing it with sikaflex and allowing to dry before reassembly - it's just to inhibit erosion in that area.
Same sort of thing on the anode bolts themselves - not utterly vital but you can preserve the condition of the anode bolts by protecting/ covering them with small dob of sikaflex- so to replace anodes next time you just dig off that sika with pliers etc to get to the oho very nicelyclean and not-eroded-at all anode bolt. You can save on ripoff sikaflex by using b+q bathroom sealant, any rubbery cack from a tube will do fine. The name of the game is to extend the life of the outrageously expensive anodes.
Also if you fit a galvanic isolator which costs about £40, then this minimises the wasteful erosion of anodes. Actually i rekon it's more like electrolytic theft of the anodes really. I am toying with the idea of some giant reverse-polarity thing which i can nip up to a pontoon, plug in overnight and bzzzz get my anodes nicely recoatd with a generous layer of someone else's zinc hoho! ...Except that someone else has obviously invented this cos otherwise where has all the zinc gone, hm, answer me that one eh? Some ratbag must have got loads of zinc, tons of it over the years. One option is to try re-invoicing the marina for the anodes their electricity has buzzed off me and tellem it is new policy with EU directive recycled carbon footprint credits otherwise they get nicked...
It's useful to stop or slow erosion of the back of the anode, partly to stop it loosening the anode and also any damage half-eroded anode might do to the hull.
You can save the cost of backing sheet by painting the back of the anode with antifoul or smearing it with sikaflex and allowing to dry before reassembly - it's just to inhibit erosion in that area.
Same sort of thing on the anode bolts themselves - not utterly vital but you can preserve the condition of the anode bolts by protecting/ covering them with small dob of sikaflex- so to replace anodes next time you just dig off that sika with pliers etc to get to the oho very nicelyclean and not-eroded-at all anode bolt. You can save on ripoff sikaflex by using b+q bathroom sealant, any rubbery cack from a tube will do fine. The name of the game is to extend the life of the outrageously expensive anodes.
Also if you fit a galvanic isolator which costs about £40, then this minimises the wasteful erosion of anodes. Actually i rekon it's more like electrolytic theft of the anodes really. I am toying with the idea of some giant reverse-polarity thing which i can nip up to a pontoon, plug in overnight and bzzzz get my anodes nicely recoatd with a generous layer of someone else's zinc hoho! ...Except that someone else has obviously invented this cos otherwise where has all the zinc gone, hm, answer me that one eh? Some ratbag must have got loads of zinc, tons of it over the years. One option is to try re-invoicing the marina for the anodes their electricity has buzzed off me and tellem it is new policy with EU directive recycled carbon footprint credits otherwise they get nicked...
Plan_B
Well-Known Member
Given that they charge £1.20 ish in the swindleries, I bought a part sheet of foam at Beaulieu BJ last year for £2.50 and cut 20 out using a old one as a pattern.
Still got enough foam left for another 20!
Also lots of freebie mouse-mats are usable - 2 x pear shapes out of each one.
Pensions don't go as far as the used to.
Still got enough foam left for another 20!
Also lots of freebie mouse-mats are usable - 2 x pear shapes out of each one.
Pensions don't go as far as the used to.
Malcb
Well-Known Member
Some chandlers sell them seperately. I noticed, recently, that the chandlery at Shamrock Quay included the foam backing pad plus locking washers and new nuts with the anode.
I'm not saying it was any cheaper, but at least it did include everything needed to change the anode.
I'm not saying it was any cheaper, but at least it did include everything needed to change the anode.
