Silverton 330 Sport Bridge, Руководство пользователя

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55
BONDING
SYSTEM
________________
The purpose of the Bonding System is to pro-
tect your yacht’s underwater components from
electrolysis and galvanic corrosion. Examples
of underwater components would be the propel-
lers, propeller shafts, rudders, engine/generator
seawater intake valves and any other metallic
parts that may come in contact with seawater.
Electrolysis and galvanic corrosion occurs pri-
marily in salt water , but can occur to a lesser
degree in fresh water. Salt water allows electric
current to
fl
ow from anodic to cathodic material.
Any two metals from two components and their
relative positions in the galvanic rating table will
determine which metal loses material (anode)
and which metal remains lar gely undisturbed
(cathode). The distance apart on the galvanic
table of the two metals determines the rate of
wear. To help prevent corrosion, sacri
fi
cial zinc
anodes are
fi
tted to the underwater components
of your yacht, such as the propeller shafts and
rudders. A lar ge sacri
fi
cial zinc anode plate
is also attached to the underwater area of the
transom (See photographs on Page 19 and 20,
which illustrate the location of the zinc anodes).
The purpose of these sacri
fi
cial zinc anodes
is to attract any destructive electrical currents
away from the metallic underwater components,
thereby preventing their eventual corrosion and
allowing the corrosion of the sacri
fi
cial zinc
anodes. The sacri
fi
cial zinc anodes are consid-
erably easier and cheaper to replace and their
deterioration will not af fect the performance
of your yacht, as would the deterioration of a
propeller or rudder.
The Bonding System is a network of wires (color
coded green) that are connected to all metallic
underwater components within the interior of
the hull, which makes them one unit for electri-
cal current purposes. This network of wires is
then attached to the sacri
fi
cial zinc anode located
on the transom, which allows corrosion of the
anode, but prevents corrosion of the underwater
components.
General maintenance of the Bonding System
consists of yearly replacement of the sacri
fi
cial
zinc anode located on the transom and all other
zinc anodes located on the propeller shafts,
rudders, etc. and should be completed during
the spring launch procedure. The anodes may
require more frequent replacement, depending
on your docking location and the length of your
boating season. If possible, check the anodes for
excessive corrosion midway through your boat-
ing season. If excessive corrosion is noted, have
your dealer or a competent technician replace
the sacri
fi
cial zinc anodes. Periodically check
the wiring connections to make sure they are
tight and free of corrosion. Tighten and clean
connections as necessary.
NOTE: Silverton recommends placing sacrifi -
cial zinc anodes on the following components:
•
Propeller shafts
•
Rudders
•
Trim Tabs
IMPORTANT: DO NOT paint any of the sac-
rifi cial zinc anodes as it will retard the fl ow of
electric current through them and render them
ineffective.