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Class 2 (2nd Engineer) MEKG 📅 Oct 2019

Exam Question

Discuss the means by which corrosion of the following may be limited by manufacturers and ship's personnel respectively:

(a) Internal and external surfaces of auxiliary steam lines.

(b) External surfaces of auxiliary boilers.

(c) Water boxes of sea water coolers and condensers.

(d) Main sea water inlet lines.

Reference Answer

(a) Internal and External Surfaces of Auxiliary Steam Lines:
Causes of corrosion in Internal Surface:
Water and oxygen in the steam can lead to corrosion through oxidation.
Carbon dioxide (CO2) in the air or steam dissolves to form carbonic acid, a corrosive agent.

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