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From: mike senko (no email)
Date: Tue Oct 02 2001 - 09:11:37 EDT
One other question on this subject.
Why would anyone want to use galvanic isolators?
To save the zinc?
The purpose of the zinc is to save the prop and other
underwater metals from galvanic corrosion.
Replacing zinc is cheaper than replacing props, through hulls,
rudders, and prop shafts.
IMHO, if you are losing your zinc's too fast, you have a problem that
needs correcting, not an isolator.
Mike
----- Original Message -----
From: "Eric Thompson" <>
To: "LIVE_ABOARD" <>
Sent: Sunday, September 30, 2001 12:02 AM
Subject: lv-ab: Galvanic Current
> Norm asked if the current was AC or DC.
> Norm,
> The current was DC. Today we measured from the shorepower
> ground pins to the bay and found that there was 0.48 Volts
> at my friends dockbox. The shorepower was negative with
> respect to the bay.
> Then we went to my dockbox, 5 slips away, and repeated the
> procedure. This time we measured 0.36 Volts. The shorepower
> was POSITIVE with respect to the bay.
> I'm sure the BAY AIN'T THE PROBLEM!
> The guy across the dock from me, 15 feet away, is losing a
> "dinnerplate" zinc every 60 days!
> GALVANIC ISOLATORS ALL AROUND!
>
> Eric Thompson
> S/V Procrastinator
> South San Francisco
>
>
>
>
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