gsc3
Well-known member
- Joined
- Jul 27, 2017
- Messages
- 72
- Fluid Motion Model
- C-32 C
- Hull Identification Number
- FMLC2454L516
- Vessel Name
- Sojourner
- MMSI Number
- 338229582
Galvanic corrosion is a hazard for boats that are docked near steel seawalls or concrete seawalls reinforced by iron rebar and are connected to shore power. The problem is particularly bad for boats with underwater aluminum fixtures, such as outboard lower units. Unplugging the boat’s power cable from the dockside AC outlet should prevent the galvanic current that causes the corrosion. Alternatively, installing a galvanic isolator, which costs about $185, will stop the galvanic current, and the resulting corrosion, even with the boat connected to shore power.