Deck General · Deck Maintenance
Galvanic corrosion of steel hull plating is commonly controlled by:
- APainting the hull white
- BFitting sacrificial zinc (or aluminum) anodes✓ Correct
- CIncreasing the vessel's speed
- DRemoving all dissimilar metals from the ship
Explanation
Sacrificial anodes (zinc, aluminum) are more active than steel and corrode preferentially, protecting the hull and underwater fittings. Impressed-current systems serve the same purpose on larger ships.
Authority: Knight's Modern Seamanship; cathodic protection principles
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