Anodes

[Seastoke]

Roy. I was speaking to Mr G, and we are in agreement. Salt water conduct electricity and you should start off by pumping out that free ballast you keep in the bilge.

 

[Seastoke]

Oh dear me. That's what anodes are designed to do when there is electrolysis. So the answer to your question is "electrolysis".

A prudent man would now look for evidence of galvanic corrosion on other parts of the boat in case the components fail and cause the boat to sink.

Bin man I was told by a vicar to be more prudent after I took your advice !!!.
I was checking my rudders and prop with a hammer ,and the sound rang out like bells . The problem , it was Sunday morning. So I now know , what prudent means , before I thought it was a loan company as I bought my first boat with money from prudential.

 

[Fire99]

This happened in another marina too. Someones saildrive fizzed away and others had a rapid depletion of their anodes.
Quite often the boat owner swears blind their boat is perfect so it must be the marinas electrical instalation.
The marina contracted mcduff to test the marina side of things and there was not one fault.

That can be the case but not always.. If a number of boats report an issue it needs looking at.. I can say categorically I had fast anode depletion and I personally (with an electrical background) did all the checks and got a 2nd opinion from a professional in the field and my boat was not to blame.... So it works both ways.