Bissoy.com
Doctors Medicines MCQs Q&A

In which process is a protective zinc coating applied on iron to prevent it from rusting?

In which process is a protective zinc coating applied on iron to prevent it from rusting? Correct Answer Galvanisation 

The correct answer is " Galvanization ".

Key Points

  • Galvanization is the process of applying a coating of zinc to steel or iron. 
  • This is done to protect steel and iron from the process of rusting.
  • The most common method of galvanization is " hot-dip-galvanization".
  • In this method, parts are submerged in a bath of molten hot zinc.

​Important Points

  • Annealing is a heat treatment process used mostly to increase the ductility and reduce the hardness of a material.
  • Smelting is a form of extractive metallurgy to produce a metal from its ore.
  • Welding is a fabrication process whereby two or more parts are fused together by means of heat, pressure or both forming a join as the parts cool. 

​​Additional Information

  • When zinc is coated on iron or steel,  it protects corrosive substances from reaching the underlying steel or iron. 
  • The electroplating such as chromate conversion coating is applied to provide further surface passivation to the substrate material.
  • The hot-dipping method is not applicable to the materials that are constantly exposed to acid and acid rains.
  • It is also not applicable to bolts and nuts.

Related Questions

The process of coating iron or steel sheet with a thin coat of zinc to prevent iron from rusting is called ____________
Which of the following statements is/are correct? A. Iron can replace zinc from zinc sulphate solution. B. Zinc can replace copper from copper sulphate solution. C. Copper can replace Iron from Iron sulphate solution.
Mr. Mukesh is a trader having products A and B. A contains 40% iron and 60% zinc, and product B contains 35% iron, 40% zinc and 25% bronze. If products A and B are mixed in the ratio 1 : 4, then what percentage of iron and zinc will be present in the newly made product respectively?
Which of the following are not chemical changes? 1. Tempering of iron 2. Conversion of the iron piece into an electro-magnet by passing the current around the iron 3. Melting of iron 4. Rusting of iron Select the correct answer using the code given below:
Iron is prevented from rusting by coating with zinc. This process is called as
Galvanization a process to prevent rusting involves use of ___ coating to steel or iron.
Two alloys of zinc and copper are combined in the ratio 3 : 5 by volume. The resultant alloy is a 45% zinc alloy. What will be the proportion of zinc in the first alloy if the proportion of zinc in the second is 70%?
Consider the following statements
1. Galvanisation is the method of protecting steel and iron fromrusting by coating them with a thin layer of zinc.
2. Pure iron is very soft but if it is mixed with a small amount of carbon, it becomes hard and strong.
3. When iron is mixed with nickel and chromium, we get stainless steel, which is hard and does not rust.
Which of the statements given above are correct?
A' had only one good eye. He was employed by 'B' on a work in which some risk to the eye by injury was clear. However, the risk was not so great as to necessitate supply of protective goggles to the workmen with both eyes good. 'B' knew the fact that 'A' had only one good eye but did not supply protective goggles to 'A' because no other workman was supplied with protective goggles. During the course of employment, the good eye of 'A' was injured. 'A' brought an action in tort.
Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is