[alberg30] zinc

Scott Wallace tristan at one.net
Wed Nov 17 13:20:25 PST 1999


From:	Scott Wallace <tristan at one.net>

Can you use zincs on outboards, too?

Scott

Robert Kirk wrote:

> From: Robert Kirk <kirk at neptune.gsfc.nasa.gov>
>
> At 09:43 AM 11/17/99 -0500, George Dinwiddie wrote:
>
> >Anytime you have dissimilar metals in a conductive solution,
> >you'll get electrolytic corrosion.  Fresh water is not nearly
> >so conductive as salt, so the speed of the corrosion may be
> >slower, but it'll still happen.  Zincs are a cheap means of
> >protecting your bronze.
>
> George is right, you do need them.  I use one of those teardrop shaped
> zincs that fit on an adapter which screws onto the end of the
> propeller.  They are readily available in the boat stores and simplicity to
> replace each year.  Each year it comes off corroded enough to show that I
> was right to use one, but not completely corroded away.
>
> I have heard that some configurations don't have enough room between the
> end of the shaft and the rudder to fit them, but they only require an inch
> or two.
>
> Bob Kirk
> Isobar #181
>
> 

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