Rusting of an Article Made up of Iron Is Called?
Corrosion is the rusting of iron, and during this process, the iron is transformed to iron oxide, which is an example of chemical change. Corrosion is a chemical change since rust is a chemical complex (hydrated iron oxide, Fe2O3.H2O) that is completely different from the element iron (Fe).
When exposed to the atmosphere, iron on the surface of an iron article turns a greenish-brown colour. Under the influence of oxygen in the environment, iron is oxidised into iron(II) oxide.
Corrosion is the term for the rusting of iron. Because the creation of iron oxide is an irreversible process, corrosion is a chemical change.
Prevention From Corrosion
- Galvanization is the application of a protective zinc coating to iron in order to prevent corrosion.
- The most prevalent procedure is hot-dip galvanising, which involves immersing the pieces in molten hot zinc.
Galvanising Protects the Underlying Iron or Steel in Numerous Ways
- When the zinc coating is intact, it prevents corrosive elements from accessing the steel or iron beneath it.
- Zinc protects iron by first corroding it. Galvanizing iron with chromates and zinc produces better and longer-lasting results.
- If the underlying metal is exposed, protection can be maintained as long as zinc is close enough to be electrically connected. Local corrosion of the base metal begins once the zinc in the area is depleted.