The metal that forms a self-protecting film of oxide to prevent corrosion is

The standard electrode potentials are given as:
$E^o_{Fe^{+2}/Fe} = -0.44 \, V$ and $E^o_{H^{+}/O_2/H_2O} = 1.23 \, V$
Calculate the $E^o_{cell}$ for the corrosion process: ............. $V$

Galvanized iron is coated with a layer of which metal?

During galvanization of iron,which metal is used for coating the iron surface?

Why is it important to stop corrosion?

Write the chemical formula of rust.