Explain the process of rusting and how could it be prevented?
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Explanation:
Iron can be prevented from rusting by applying a layer of Chromium or zinc. To protect iron and steel from rusting, a layer of zinc is applied on it. This process is known as Galvanisation. Stainless steel is obtained by mixing carbon, manganese, nickel and chromium with iron.
Answer:
Rusting : If an iron piece is kept open for sometime, a brown layer is obtained on the surface of iron. This brown layer is rust and the process is called rusting. Rust is not iron but a new substance iron oxide is formed as a chemical reaction.
The process of rusting can be represented as:
Iron Fe+oxygen O2(in air)+water H2O⟶Ironoxide Fe3O3
For rusting of iron, air and moisture are two important factors. Rust gradually destroys iron. As iron is used in structure of ships, cars, trucks, bicycle etc and in the formation of bridges and big buildings. Therefore, to prevent rusting, it is necessary to protect it from air and moisture both.
A simple solution to this is painting, oiling, greasing etc. Iron can be prevented from rusting by applying a layer of Chromium or zinc. To protect iron and steel from rusting, a layer of zinc is applied on it. This process is known as Galvanisation. Stainless steel is obtained by mixing carbon, manganese, nickel and chromium with iron. It is hard and resistant to rust.