Corrosion Protection - ZF SD-10 Description And Owners Manual

The SD-10 is equipped with a replaceable sacrificial anode on the lower leg of the drive. This
anode is designed to dissolve in response to electrical current generated while in sea water.
This anode is not designed to accommodate other hardware or other excessive electrical
currents related to additional components or changes to the electrical AC and DC systems on
The ZF SD-10 will be mechanically connected to the powering engine. The design of the
electrical system of the engine will impact the selection of a proper galvanic protection system.
Isolated systems:
If the engine alternator and starting motor uses an isolated circuit (having both a
battery + and – connection terminal) then the system can be treated as an
"isolated" system.
Non-Isolated systems:
If either the starter motor or the alternator uses a single battery + and uses the
body or case as a ground through the engine, then the system of the SD-10 and the
engine must be considered as "grounded" to the battery negative and not isolated.
VI CORROSION PROTECTION
board the vessel.
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