Class 2 (2nd Engineer) MEKG 📅 Feb 2024

Exam Question

(a) What different methods are used for preserving ship's hull during service. What type of antifouling coats are used (8)

(b) State what materials are being banned by international regulation for use in Antifouling coats and the reason for banning. (4)

Reference Answer

### (a) Hull Preservation Methods and Antifouling Coats
Methods for preserving a ship's hull during service are a combination of protective coatings and electrochemical systems designed to prevent corrosion and fouling.
**1. Hull Preservation Methods:**
* **Protective Coating Systems:** This is the primary defence against corrosion. A typical modern high-performance system applied after surface preparation (e.g., abrasive blasting to SA 2.5 standard) consists of multiple layers:

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