Corrosion Resistant: The ability to prevent corrosion on the substrate is what is meant by corrosion resistance. Example: Oil can prevent the rusting of iron so it is corrosion-resistant.
Zinc: Zinc is a d- block element having a full-filled d-orbital.
The corrosion rate of ferrous metals can be greatly slowed down by the corrosion byproducts that zinc naturally forms.
Steel is shielded from corrosion in two ways by zinc First off, zinc or a zinc-containing separating layer separates the steel from the corrosive environment physically second is the benefit of zinc is that it develops a surface patina that substantially slows down the corrosion of the zinc itself.