Class 1 (Chief Engineer) Engineering Management 📅 Jan 2025

Exam Question

Anti Fouling Systems (AFS) convention - compliant paints have received special focus with the recent developments of energy-efficiency regulations in shipping. Against this background discuss:

(a) Composition of cathodic and anodic protection. (5)

(b) Process of application of a AFS Convention-compliant paint scheme on an existing ship and the additional supervisions required to ensure its effectiveness. (6)

Reference Answer

### (a) Composition of Cathodic and Anodic Protection
As a Senior MEO Class 1 Examiner, the distinction between systems for internal piping (Anodic Protection/MGPS) and external hull protection (Cathodic Protection/ICCP) is critical. A full-marks answer must clearly differentiate their principles, components, and purpose.
#### 1. Anodic Protection (Marine Growth Prevention System - MGPS)
This system is primarily installed to prevent bio-fouling and secondarily to control corrosion within the ship's seawater cooling systems (sea chests, strainers, piping, and heat exchangers).

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