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

Exam Question

(a) Sketch the cross-section of a bulk carrier with either deep or shallow double bottom showing the type of framing used (6)

(b) Describe the corrosion problems experienced within the ballast tanks (5)

Reference Answer

(a) Mid-ship section of bulk carrier:
(b) (i) Corrosion problems in ballast tanks are significant and arise due to various factors:
Galvanic corrosion occurs due to the interaction between dissimilar metals, accelerated by the seawater environment and differential aeration.
Sulphate-reducing bacteria in river mud can cause localized pitting, leading to penetration of the bottom shell.

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