Question

In galvanizing, iron sheets are coated with zinc metal.
True
False

Answer 1

Hint: We have to know that Galvanization or galvanizing is the process of applying a protective zinc to avoid rusting. The common method is hot-dip galvanizing, where the parts are immersed in a bath of molten hot zinc.

Complete step by step answer:
One of the methods to prevent rusting is galvanization. We can use a thin layer of zinc to coat objects of iron (or) steel. This could stop/avoid oxygen and water reaching the metal underneath. Zinc also performs the role of a sacrificial metal. We know that zinc is more reactive when compared to iron. Therefore, zinc oxidizes the object first when compared to iron.
We also know that when iron and moist air come together, they react with each other and form a brown coloured powder known as rust. Iron is damaged by iron. So, we can coat iron sheets with zinc to prevent iron from rusting.
Some other reasons why we coat iron with zinc metal are,
When intact, the coating of zinc avoids corrosive substances from attaining the underlying steel or iron.
The zinc defends iron by corroding. For successful results, application of chromates over zinc is seen as an industrial trend.
The underlying metal turns explosive, protection could continue as long as there is zinc close enough to be electrically coupled. In the immediate area, after zinc is consumed, localized corrosion of the base metal could take place.
In galvanizing, zinc metal coats iron sheets.
The answer is true.

Note:
We have to know that galvanized steel could last for several decades if other supplementary measures are regulated like paint coatings and extra sacrificial anodes. The rate of corrosion in non-salty environments is mainly due to the levels of sulfur dioxide in the air. We can use hot dip galvanized steel for manufacturing steel frames as a fundamental construction material for steel frame buildings.