(a) Briefly discuss the principle and the key components and elements of an ICCP system, outlining their functions in safeguarding the integrity of metal structures on ships.
(10)
(b) Enumerate the advancements in ICCP technology over the years and how these innovations contribute to more efficient and sustainable corrosion protection.
(6)
Reference Answer
### (a) Principle, Key Components, and Functions of an ICCP System (10 Marks) #### Principle of Operation The principle of an Impressed Current Cathodic Protection (ICCP) system is to suppress the natural electrochemical corrosion process that occurs on a ship's hull when immersed in an electrolyte like seawater. Corrosion is an electrochemical reaction involving four key elements: an anode (where metal is lost), a cathode, an electrolyte (seawater), and a metallic path (the hull itself). 1. **Electrochemical Suppression**: The ICCP system converts the entire wetted surface of the ship's hull into the cathode of an electrochemical cell. It achieves this by impressing a controlled, low-voltage Direct Current (DC) from an external power source onto the hull via strategically placed anodes.
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