Exam Question

### (a) Sketch and Description of an Impressed Current Cathodic Protection (ICCP) System
**Principle of Operation:**
The Impressed Current Cathodic Protection (ICCP) system is an active method used to prevent the electrochemical corrosion of a ship's hull. The principle is to suppress the natural galvanic currents flowing between anodic and cathodic areas on the hull surface. This is achieved by impressing a direct current from an external source onto the hull, forcing the entire submerged hull surface to act as the cathode of an electrochemical cell. Seawater acts as the electrolyte. This effectively stops the hull metal from losing ions to the sea, thus preventing corrosion.
**System Components and Description:**