Cathodic Protection on Steel Reinforced Concrete Marine Structures

摘要

The corrosion of reinforcing steel in concrete is considered the major cause of deterioration on steel reinforced concrete structures located in marine environments. Millions of dollars are spent every year in repairing the damaged structures to assure their safe use. This deterioration is most evident on substructure components (foundations, footers, pilings, etc.) in southern climates, however can also be present on superstructure components (bridge decks, beams, pile caps, etc.) on the Pacific coast or in northern states where de-icing salts are used. The use of cathodic protection has become the preferred method for mitigating corrosion of steel reinforcement in concrete. A wide variety of both impressed current and sacrificial systems have been effectively used to control the effects of corrosion on steel reinforced concrete structures located in marine environments.