Question

Galvanized iron sheets are coated with:
A. copper
B. nickel
C. zinc
D. carbon

Answer 1

Hint As we know that galvanization is the process of applying a protective sheet to avoid rusting. We can see that the most common method is hot-dipping galvanizing, in which the parts are found to be immersed in a bath of molten hot zinc.

Complete Step by step solution:
- It is found that we can use a thin layer of zinc to coat objects of steel.
- This mainly could stop oxygen and water reaching the metal underneath. It is also found that zin also performs the role of a sacrificial metal.
- As we know that zinc is more reactive than compared to iron. Hence, when compared to iron, zinc oxidizes the object first.
- It is found that when iron comes in contact with air then rust is formed, so we can coat iron sheets with zinc to prevent iron from rusting.
- As we know that zinc defends iron by corroding. And for better result application of chromates over zinc is seen as an industrial trend.

- Hence, we can conclude that the correct option is (c), that is Galvanized iron sheets are coated with zinc

Note: -It is found that the rate of corrosion in non-salty environments is mainly due to the levels of sulphur dioxide present in the air. We can also use hot dip galvanized steel for manufacturing steel frames that acts as a fundamental construction material for steel frame buildings.