Exam Question
(a) Discuss the use of Non-metals onboard Ships & name some of the common non-materials 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
📅 Sep 2024
Reference Answer
### (a) Use and Common Non-Metals Onboard Ships
Non-metallic materials are extensively used in marine applications due to their superior properties in specific contexts compared to traditional ferrous metals. Their primary advantage lies in overcoming the inherent weaknesses of steel in a marine environment, such as susceptibility to corrosion and high density. The selection of a non-metal is based on its specific chemical and physical properties which make it suitable for a particular function.
Key reasons for their use include:
* **Corrosion Resistance:** They are immune to galvanic and electrolytic corrosion, which is a major issue for metals in the presence of seawater as an electrolyte.
Non-metallic materials are extensively used in marine applications due to their superior properties in specific contexts compared to traditional ferrous metals. Their primary advantage lies in overcoming the inherent weaknesses of steel in a marine environment, such as susceptibility to corrosion and high density. The selection of a non-metal is based on its specific chemical and physical properties which make it suitable for a particular function.
Key reasons for their use include:
* **Corrosion Resistance:** They are immune to galvanic and electrolytic corrosion, which is a major issue for metals in the presence of seawater as an electrolyte.
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