Class 2 (2nd Engineer) MEKG 📅 Jul 2023

Exam Question

(a) Describe the preparation necessary before the application (in dry dock) of sophisticated or approved long life coating to the underwater surface of the hull. (8)

(b) State the significance of the roughness profile. (4)

Reference Answer

### (a) Preparation for Application of Long Life Coating (8 Marks)
Preparation of the underwater hull surface in dry dock is the most critical factor determining the performance and lifespan of a sophisticated coating system. The process involves meticulous stages to ensure the substrate is perfectly prepared for coating application.
**1. Initial Survey and Assessment:**
* Upon dry docking, the hull is inspected to assess the condition of the existing coating, the extent of fouling, corrosion, and any physical damage.

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