Anodes

[pessimist]

I know there is some debate about wiring anodes to seacocks. The previous owner has neatly circumvented the issue by wiring one in one hull and not in the other. The one which is wired goes to the battery negative which seems odd. The seacocks are newish DZR and I understand Vyv Cox,s excellent site correctly should not be wired. The props and sail drives both have their own anodes. Should the hull anodes be wired to anything? Do they serve any useful purpose? Is the world flat?
TIA
Confused of Exmoor

 

[NBs]

Hi,

I hope this article help you.

The Mysteries of Bonding Systems - Professional BoatBuilder Magazine

NBs

 

[Alex_Blackwood]

I know there is some debate about wiring anodes to seacocks. The previous owner has neatly circumvented the issue by wiring one in one hull and not in the other. The one which is wired goes to the battery negative which seems odd. The seacocks are newish DZR and I understand Vyv Cox,s excellent site correctly should not be wired. The props and sail drives both have their own anodes. Should the hull anodes be wired to anything? Do they serve any useful purpose? Is the world flat?
TIA
Confused of Exmoor

Is there, by any chance, also a connection to the shore power earth as well as the bat.-ve?

 

[pessimist]

Is there, by any chance, also a connection to the shore power earth as well as the bat.-ve?

Not that I can see.

 

[vyv_cox]

DZR needs no anode protection, it is highly resistant to corrosion. My Blake's seacocks are amongst the first DZR ones made, in 1984. All three of them survive in good condition.

Now that ball valves, skin fittings and hose tails are all available in DZR there is even less need to protect them with an anode than previously, although there is only a very small voltage between all of the copper alloys.

Over-riding all of this, what are you asking a zinc anode to do? The answer is protect the zinc phase in brass to prevent dezincification. This is clearly impossible as they are the same material.

 

[pessimist]

Thanks, that clears it up clearly and succinctly. Now, about my second questio - round or flat?

 

[vyv_cox]

Thanks, that clears it up clearly and succinctly. Now, about my second questio - round or flat?

What is it connected to? Not that the shape has any influence. I removed my hull anode in 1994. The only ones I have are one on the prop and one on the shaft. P-bracket and prop are painted.

 

[pessimist]

Sorry, poor attempt at humour. I was referring to the world. Thanks again for your answer.

 

[vyv_cox]

Sorry, poor attempt at humour. I was referring to the world. Thanks again for your answer.

Pear shaped for less resistance

 

[MikeBz]

Pear shaped for less resistance

Excellent, that’s very much the way it seems to be going.