Do my anodes get eaten if.....

[vyv_cox]

All you need is two dissimilar metals somewhere on the boat, as I have found and they don't even have to be under the water.

Surely there is no boat in the world that does NOT have dissimilar metals, all connected together, above the waterline? In the same way that an engine cannot be protected by an external anode, an external anode cannot be sacrificially corroded by an internal engine.

 

[Woodlouse]

Perhaps this explains where all my teaspoons go.

I think there's a very real possibility they end up in my cutlery draw. I did a count up last year and couldn't figure out how I only came to have five knives, but nearly 80 spoons.

 

[nigelmercier]

I think there's a very real possibility they end up in my cutlery draw. I did a count up last year and couldn't figure out how I only came to have five knives, but nearly 80 spoons.

This could be a wormhole, like the one that Biros use. Let's try an experiment: I'll put a random object in my teaspoon compartment, if it ends up in your drawer, you tell me what it is.

 

[VicS]

Perhaps this explains where all my teaspoons go.

For your teaspoons to be consumed by galvanic corrosion you must have some more noble metal on the boat.

Presumably the spoons are silver so perhaps the trouble is due to all the gold fittings you have in the heads.


I reckon my spoons disappear because the GRP hull is a more noble plastic than the common plastic the spoons are made of.

 

[Woodlouse]

This could be a wormhole, like the one that Biros use. Let's try an experiment: I'll put a random object in my teaspoon compartment, if it ends up in your drawer, you tell me what it is.

It's either a pair of scissors. Or another bloody teaspoon.

 

[nigelmercier]

It's either a pair of scissors. Or another bloody teaspoon.

No, you must be getting them from someone else. It was a cork-screw. It has definitely gone, went soon after 6pm

 

[Woodlouse]

No, you must be getting them from someone else. It was a cork-screw. It has definitely gone, went soon after 6pm

Well that's one possibility to check off the list. I think in retrospect I'm looking for a boat with a gross surplus of knives.

 

[nigelmercier]

Well that's one possibility to check off the list. I think in retrospect I'm looking for a boat with a gross surplus of knives.

You mean the wormhole is bidirectional?

 

[Deleted member 36384]

Not wormholes, wire coat hangers. If you have wire coat hangers on your yacht that is the problem. I think they convert stuff to replicate.

 

[ianj99]

I use an isolating transformer rather than galvanic isolator as my boat is steel and on shore power post of the time. The 6 anodes last at least 3 years.
(the boat electrics are insulated return so the hull is not used as an earth so no stray dc leakage)

The best zinc saver is coat of paint

 

[santavey]

Surely there is no boat in the world that does NOT have dissimilar metals, all connected together, above the waterline? In the same way that an engine cannot be protected by an external anode, an external anode cannot be sacrificially corroded by an internal engine.

oohh...now I am confused. No anode anywhere on my Volvo 2002 fresh water cooled. Not one on the engine. Not one on the heat exchanger that I can find.
I'm told that engine doesn't have one. So if the engine cannot be protected by an external anode what protects it?
Now suffering acute engine/anode paranoia.

 

[VicS]

oohh...now I am confused. No anode anywhere on my Volvo 2002 fresh water cooled. Not one on the engine. Not one on the heat exchanger that I can find.
I'm told that engine doesn't have one. So if the engine cannot be protected by an external anode what protects it?
Now suffering acute engine/anode paranoia.

It does not need protecting. The engine itself is protected from internal waterside corrosion by the inhibitors in the antifreeze with which it should be filled ....... Just like your car engine is. The design and materials used in the construction of the heat exchanger mean it does not need any protection by anodes.


The seawater cooled version has an anode in the cylinder head

 

[vyv_cox]

VicS beat me to it, no need to repeat what he has said. Raw water cooled engines have an internal anode(s) and cannot be protected by an anode on the hull.