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Question
A lamp post made of which amongst the following materials will rust easily?
A lamp post made of which amongst the following materials will rust easily?
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Solution
The correct option is C
Iron
Iron articles, when exposed to air and moisture for a prolonged time, acquire a brown flaky coating called rust. Rusting reduces the structural strength of iron and can be prevented by painting, galvanising, greasing and alloying.
Applying paint on the surface of iron object shields iron from coming in direct contact with air and moisture.
In oiling and greasing, a film of oil or grease is applied on iron objects.
Galvanisation is a method to prevent rusting by applying a coating of zinc on the iron surface.
Alloying is a method to prevent rusting by mixing a metal with one or more metals or non-metals. An alloy is a mixture of one or more metals or non-metals. Stainless steel is an example of an alloy made by mixing iron with some other metals and non-metals.
Iron
Iron articles, when exposed to air and moisture for a prolonged time, acquire a brown flaky coating called rust. Rusting reduces the structural strength of iron and can be prevented by painting, galvanising, greasing and alloying.
Applying paint on the surface of iron object shields iron from coming in direct contact with air and moisture.
In oiling and greasing, a film of oil or grease is applied on iron objects.
Galvanisation is a method to prevent rusting by applying a coating of zinc on the iron surface.
Alloying is a method to prevent rusting by mixing a metal with one or more metals or non-metals. An alloy is a mixture of one or more metals or non-metals. Stainless steel is an example of an alloy made by mixing iron with some other metals and non-metals.
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