Exam Question
(a) How are heat exchangers protected from the effects of corrosion? (8)
(b) What are the problems associated with bio-fouling? (8)
Class 4 (4th Engineer)
MEP
📅 Nov 2025
Reference Answer
### (a) How Heat Exchangers are Protected from Corrosion
Protection of marine heat exchangers, particularly those using seawater as a cooling medium, is a multi-faceted approach involving material selection, electrochemical protection, design considerations, and rigorous operational maintenance.
**1. Material Selection (Primary Defence)**
The choice of materials is the first line of defence against corrosion. Different components are constructed from materials specifically chosen for their resistance to the fluid they will contact.
Protection of marine heat exchangers, particularly those using seawater as a cooling medium, is a multi-faceted approach involving material selection, electrochemical protection, design considerations, and rigorous operational maintenance.
**1. Material Selection (Primary Defence)**
The choice of materials is the first line of defence against corrosion. Different components are constructed from materials specifically chosen for their resistance to the fluid they will contact.
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