[Public-List] Rudder Zinc

[Glennb]

Clayton,

I have a 2" diameter zinc screwed onto the hull just in front of the rudder pinter and bonded to the Pintle with heavy gauge copper wire.  also a zinc on the end of the prop shaft abaft the prop.  Both zinc's get eaten up each year.  Never had any corrison issues on the shoe, however my rudder shaft runs down to the pin in the shoe, so might be getting catholic protection from the Pintle zinc.  

BTW my boat was over zincked when I first bought it. It had three zincs, the third was on the rudder. The overzincing was causing green corrosion  buildup on the bronze castings So I took the one off the rudder and have been happy camper since.

Glenn
Dolce 318

Sent from my iPad

On Oct 19, 2012, at 7:25 PM, George Dinwiddie <gdinwiddie at alberg30.org> wrote:

> Clayton,
> 
> On 10/19/12 10:17 PM, Clayton Zimmerman wrote:
>> 
>> 
>> Hello all, quick question as I prepare for a weekend camping out in
>> the boatyard and working on Tanager #349. Tanager has a sloppy rudder
>> which I've tracked down to the rudder boot. Kirk on Salsa shared his
>> great advice on how he fixed his rudder and I'm looking to do the
>> same. The question is are the round zincs on the fin of the rudder
>> somehow electrically connected to the brass fittings on the rudder?
> 
> That's pretty hard to know, as zincs on the rudder are not common on the Alberg 30.
> 
>> My thought is to use a teflon bearing/bushing pressed into the rudder
>> boot. It would be sacrificial and eventually need replacement, but
>> would save the rudder pin from further wearing. However if that zinc
>> is critical, I've also just electrically isolated the boot and fear
>> it will corrode away. Mind you, there is also a zinc on the prop
>> shaft. Appreciate the great knowledge of this forum,
> 
> - George
> 
> -- 
> ----------------------------------------------------------------------
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