What is Corrosion Class 10?

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Detailed Solution

Corrosion is the slow destruction of metals due to their reaction with air, water, or other chemicals. Corrosion occurs when metals like iron come in contact with moisture and oxygen. Over time, they form a weak, flaky substance called rust. This process weakens the metal.

Common Example:

Rusting of Iron: When iron reacts with water and oxygen, it forms iron oxide or rust.

4Fe + 3O₂ + 6H₂O → 4Fe(OH)₃ (rust)

Conditions for Corrosion:

Presence of water or moisture
Presence of air (oxygen)
Pollutants or salts can speed up corrosion

Effects of Corrosion:

Weakens structures like bridges and buildings
Damages vehicles, machines, and tools
Leads to economic losses

Prevention of Corrosion:

Method	Description
Painting	Covers metal to stop air and moisture
Galvanization	Coating metal with zinc
Oiling or Greasing	Prevents water contact
Alloying	Mixing metal with others to resist corrosion

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