Rich,
No, it does not. The problem in your neighbor's boat affecting your boat IS
the common bonding. Without that, there is no circuit! Secondly, a ground
isolator is not a cure, it is an inhibitor because the leakage current
through that diode is still very damaging. These measures only address stray
current corrosion. Galvanic corrosion on the other hand, causes identical
damage, but is caused by dissimilar metals in a common electrolyte and
sacrificial anodes are another band aid, not a cure. These anodes can
actually encourage galvanic corrosion. This is a very complex subject and if
you are suffering from this, the goal should be elimination, not a band aid.
On another point, there is a lot of advise out there in print that is either
incomplete or unadulterated b-ll s---t and propagating it without a thorough
understanding does no one any good.
Steve

"RichH" wrote in message
...
Opppps, Brain Fart !!!

Zinc (-1.0v) less reactive than Mg (-1.6v).

Still the rest applies: galvalnic isolator, common bonding through the
AC ground, reference cell, etc., etc.