2006 Hunter 36 Galvanic Corrosion

[Frank Reinhart]

I recently bought a 2006 Hunter 36 and having some serious galvanic corrosion issues. I put a new prop on the boat and it already has significant damage. The boat is moored on the West Coast of Florida. A certified marine electrician has not been able to identify the source of the problem yet. Looking for insight from other Hunter owners.
Thx
Frank

 

[Charles Erwin]

Can you supply a copy of the hull potential measurements your certified electrician obtained?
What is the condition of the zinc anode(s) fastened to the shaft and/or the propeller?

For the time being rig a wire and zinc 'guppy'. The wire fastens well and solid to the shaft - the guppy goes in the water. (Don't forget to detach before using.)

Charles

 

[Frank Reinhart]

Thx Charles. I did put a Guppy in the water and it does work. I think the zinc anodes were not installed properly on the shaft. They don't have much wear on them.

 

[Charles Erwin]

Propellers range from relatively expensive to excessively expensive so potential measurements are worth the effort and easy to perform too.

To clinch a diagnosis - obtain hull potential assessment results. Culprit might be a DC (maverick) current problem and is not galvanic at all.

No guesswork necessary.

Charles

 

[Frank Reinhart]

Thx again Charles

 

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