Galvanic Corrosion; Corrosion Prevention - Four winns FREEDOM Owner's Manual

B. Galvanic Corrosion
Galvanic corrosion results from a potential electrical dif-
ference existing between dissimilar metals immersed in
a conductive solution (e.g., salt or brackish water). If
these metals touch or are otherwise electrically con-
nected, this potential difference produces an electron
flow between them. The attack on the more active metal
is usually increased and the attack on the less active
metal is decreased, as compared to when these metals
are not touching.
C. Corrosion Prevention
Anti-corrosion anodes are attached to the bottom of the
gimbal housing to prevent corrosion to your stern drive
and underwater parts. These anodes will be slowly
eroded away by galvanic action and require periodic in-
spection. Please refer to the section on "Anti-Corrosion
Anodes" in your engine manufacturer's manual for ad-
ditional information. The engine manual is included in
the owner's packet.
Freedom™/Horizon™ Owner's Manual Section H
Page 10