Question
Write a note on corrosion.
✓
Answer
- Metal gets corroded in the presence of acid and moisture.
- This process is called corrosion.
- Rusting of iron, tarnishing of silver, green coating of salt on the utensils of copper are the examples of corrosion.
- Due to corrosion, iron gets covered with a red brown substance (powder) which is called rusting of iron (or corrosion).
- Corrosion causes damage to the articles (objects) made from iron such as car-bodies, bridges, iron railings, ships, etc.
- There is a huge expenditure to control corrosion.
- Rusting can be prevented by painting the surface of iron or coating the surface of iron with more reactive metal $(Zn)$.
- Prevention of corrosion by coating iron surface with zinc is called galvanization.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
With the help of suitable figure, explain about angle of deviation.
Distinguish between:
Nervous System and Endocrinal System
Nervous System and Endocrinal System
State the characteristics of the magnetic field produced by a current-carrying circular loop. Sketch its magnetic field lines.
If in figure 11.24, $R_1=10 \Omega, R_2=40 \Omega$, $R_3=30 \Omega, \quad R_4=20 \Omega, \quad R_5=60 \Omega$ and a 12 V battery is connected to the arrangement. Calculate (a) the total resistance in the circuit and (b) the total current flowing in the circuit.
→Distinguish between: Fossil fuels and Bio fuels
Write the Joule's law of heating? state the factors on which heat generated in a conductor due to electric current depends.
Write short note on: Budding
State advantages and limitations in harnessing wind energy.
