Princess 45 Anodes eating up pretty fast

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Soul_dancee

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Hi everyone.

Here is another complicated case ?

For some reason my rudder anodes are eating up pretty quickly

(changed oct2020 - march2021 and now i am in the process of changing the by middle of November)

I have tried many electrician to find out if there is any electrical discharge from the shore power or the generator. But no luck.

I am not sure if most boats face this issue.


Thanks
 
Looks like you could be suffering from 'stray current corrosion '
How long have you been in your present berth ?
Are there any new arrivals possibly discharging into the marina nearby and setting up electrolytic action.
 
Soul_dancee said:
As i read about it it sound really interesting, but does it really work?
Click to expand...

Only one way to find out ??

I thought it did and it gave we a warm feeling of security. Worth a go for £70 for the plug inline version and see what your anodes look like next time round.
 
You need to go from first principles:
A full continuity test when the boat is out of the water, and write out on a drawing what bit of metal is connected to what other bit of metal and what anode protects it.

Check all bonding wires and connections inside the boat if green and furry replace wire with tinned wire and replace connections, also cover in grease and check continuity.

With Anodes always use a serrated washer.

Do you have a galvanic isolator ? see

Get an electrician to check around your boat for stray currents.

Check all your skin fittings inside and out for connectivity, condition pink?, are they leaking do the valves close easily.

A good indicator of a problem is uneven anode errosion ie port is all gone and starboard is like new. To work anodes need to errode evenly to do their job.

Anodes might look expensive until you look at the price of props, shafts
 
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