Exam Question
(a) Discuss the use of non-metals onboard ships and name some of the common non-metals 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
📅 May 2023
Reference Answer
### (a) Use of Non-Metals Onboard Ships and Common Examples
Non-metallic materials are extensively utilized in modern ship construction and repair due to their superior properties in specific applications compared to traditional metals. Their primary advantage lies in their versatility and ability to resist the harsh marine environment. The use of these materials is driven by the need for corrosion resistance, weight reduction, and improved insulation (both thermal and electrical).
**Key Reasons for Use:**
* **Corrosion Immunity:** Unlike ferrous metals, most non-metals are inert to saltwater and do not suffer from galvanic or electrolytic corrosion, significantly reducing maintenance and extending component life.
Non-metallic materials are extensively utilized in modern ship construction and repair due to their superior properties in specific applications compared to traditional metals. Their primary advantage lies in their versatility and ability to resist the harsh marine environment. The use of these materials is driven by the need for corrosion resistance, weight reduction, and improved insulation (both thermal and electrical).
**Key Reasons for Use:**
* **Corrosion Immunity:** Unlike ferrous metals, most non-metals are inert to saltwater and do not suffer from galvanic or electrolytic corrosion, significantly reducing maintenance and extending component life.
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