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Class 2 (2nd Engineer) SC&S 📅 Apr 2024

Exam Question

With reference to the prevention of hull corrosion discusses: (16)

(a) Surface preparation and painting of new ship plates.

(b) Design of the ships structure and its maintenance.

(c) Cathodic protection by sacrificial anodes, of the internal and external areas of the ship.

Reference Answer

(a) Surface Preparation and Painting of New Ship Plates:
The process begins with the removal of mill scale, a thin layer of iron oxide that forms during the steel rolling process.
1. Removal of Mill Scale:
Weathering: Using wire brushes.

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