Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q56 (NDA-II/2023) Science & Technology › Basic Science (Physics, Chemistry, Biology) Official Key

Galvanization is a method of protecting iron from rusting by coating with a thin layer of

Explanation

Galvanization is a chemical process used to protect iron and steel from rusting by applying a thin protective coating of Zinc (Option C). This method is highly effective for increasing the longevity of metal structures exposed to the environment.

  • Physical Barrier: The zinc layer prevents oxygen and moisture, the primary causes of oxidation, from reaching the underlying iron surface.
  • Sacrificial Protection: Zinc is more reactive than iron. In the presence of an electrolyte (like moisture), zinc acts as a sacrificial anode and corrodes first, protecting the iron even if the coating is slightly damaged or scratched.
  • Application: The most common technique is hot-dip galvanizing, where the iron component is submerged in a bath of molten zinc at high temperatures.

Because of its durability and cost-effectiveness, galvanization is widely used in construction, automotive industries, and for manufacturing household items like buckets and pipes.

✓ Thank you! We'll review this.

SIMILAR QUESTIONS

IAS · 1994 · Q127 Relevance score: 5.44

Galvanised iron sheets are protected from rusting due to the presence of a layer of

NDA-II · 2021 · Q74 Relevance score: 4.26

To protect steel and iron from rusting, a thin layer of which one of the following metals is applied ?

NDA-II · 2013 · Q37 Relevance score: 2.82

Statement I : Zinc is used for galvanization to protect iron of from rusting. Statement I : Zinc is more reactive towards oxygen than iron.

CDS-II · 2011 · Q109 Relevance score: 0.73

Sacrificial anode protects iron of ships, underground pipelines etc. from rusting, a process known as cathodic protection. Which one of the following metals cannot be used as a sacrificial anode ?

NDA-II · 2017 · Q66 Relevance score: 0.40

Zinc is used to protect iron from corrosion because zinc is