540
14
MAINTENANCE
Studio ti 03312 540-04usa
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14.2 SACRIFICIAL ANODES
The submerged, external metal parts of the yacht and internal parts of the
engines and generator are protected from corrosion by means of
sacrifical anodes. The anodes waste away to protect the metals on which
they are installed. Outside the hull there is a sacrifical anode fixed to the
stern.
If the bow thruster is installed also this one must carry a sacrifical anode.
These anodes are intended to waste away sacrifically as a protection for
metals that are in contact with seawater. If the anodes waste away
completely, other metal components may undergo corrosion.
All anodes should be inspected regularly to monitor their wasting rate.
Any anode with a fifty percent (50%) of wear respect to its original size,
should be replaced. The rate of wasting away of sacrifical anodes
depends on many factors, e.g., internal electrical faults, external
electrical faults and the presence of other corrosion accelerators or
galvanic activity near your yacht.
The anodes that protect the internal parts of the engines and generator
are located in the internal seawater cooling circuits.
Check the engine and generator manuals for the location of these
important internal anodes. The internal anodes should be checked at
regular intervals, depending upon how many hours the engines or
generator is used.
There also may be internal anodes in other equipment that uses seawater
as a cooling liquid. Check and replace these anodes according to the
maintenance schedule and instructions in the Manufacturer’s manuals for
the specific equipment.
NOTICES
Each time the yacht is dry-shored, check the condition of the propeller,
shafts and all underwater metals. Examine the protective anodes, and
the fastening system. Replace the anodes if their wear exceeds the
50% of their size.
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