The document discusses corrosion control methods for underwater piles. It introduces corrosion and its causes, then describes five zones of corrosion on marine piles. It outlines conceptual studies and three phases of corrosion management. Major corrosion control methods discussed are protective coatings (metallic, inorganic, organic) and cathodic protection using suspension anode delivery systems. Standards from NACE International, ASTM, and others are referenced. The conclusion states that cathodic protection is most effective for marine conditions while coatings are used on large structures.