Question

Galvanization is the:
(A) Deposition of aluminium on iron
(B) Deposition of copper on iron
(C) Deposition of tin on iron
(D) Deposition of zinc on iron

Answer 1

Hint: Here, in this answer, we have to discuss about galvanisation, so galvanisation is the process of applying a protective zinc coating to steel or iron, just to prevent rusting the most common method is hot dip galvanizing, in which steel sections are submerged in between both of molten zinc. Galvanisation is mostly involved in cleaning steel and immersing it in molten zinc to obtain a coating.

Complete step by step answer:
As we learnt previously, galvanisation forms a deposition of zinc which prevents corrosive substances from reaching the underlying steel or iron. The zinc, it serves as a sacrificial anode. So, in future if the coating is scratched, then the steel which is exposed will be protected by the remaining zinc. The zinc protects its base metal by corroding before iron.
And it is a process that is applied protective zinc coating to steel or iron and these galvanisations can be done with electrochemical and electrodeposition processes.
Hence, Galvanization is the decomposition of zinc on iron.
Additional information: In the galvanisation process, a galvanized layer protects steel against long time corrosion. If an organic is deposited on the zinc, these are called a duplex system.
(Zn + organic top layer)
And we also have to know about this point that zinc is deposited during discontinuous galvanisation generally with a layer thicker between approximately 80 and 150 um. And this layer inside out a double layer and it is a very impactive one also.

So, the correct answer is Option D .

Note:
Galvanising is a very popular way of protecting iron and steel against corrosion. And also, in the agricultural sector most corrosion protection which is used in construction is very stable by realized galvanized steel.