Exam Question
(a) Discuss the use of Non-metals onboard ships & name some of the common nonmetals used. (4)
(b) What are their areas of application on ships? (4)
(c) Name the advantages & also the limitations in using non-ferrous materials. (8)
Class 4 (4th Engineer)
MEKG
📅 Aug 2025
Reference Answer
### (a) Use of Non-metals Onboard Ships & Common Examples
Non-metallic materials are extensively used on modern ships due to their superior performance characteristics in the harsh marine environment. Unlike ferrous metals, they offer a unique combination of properties that make them ideal for specific applications where traditional materials would fail or be suboptimal. The primary reasons for their use revolve around their excellent resistance to corrosion, low weight, and insulating properties.
**Key Reasons for Use:**
* **Corrosion Resistance:** The marine environment, with its high salinity and moisture, is extremely corrosive to ferrous metals. Non-metals are largely immune to galvanic corrosion and chemical attack from seawater.
Non-metallic materials are extensively used on modern ships due to their superior performance characteristics in the harsh marine environment. Unlike ferrous metals, they offer a unique combination of properties that make them ideal for specific applications where traditional materials would fail or be suboptimal. The primary reasons for their use revolve around their excellent resistance to corrosion, low weight, and insulating properties.
**Key Reasons for Use:**
* **Corrosion Resistance:** The marine environment, with its high salinity and moisture, is extremely corrosive to ferrous metals. Non-metals are largely immune to galvanic corrosion and chemical attack from seawater.
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