Question

why rusting of iton ia faster in costal areas than deserts

Answer 1

hey mate here is ur ans
rust is -Fe2O3.xH2O

the factors which affect rusting is the moisture content
in coastal region due to the closeness to water bodies relative humidity is higher
whereas deserts are dry with scarce rainfall thus lack of moisture in air
so the rate of rusting is faster in case of coastal areas than in case of deserts

hope it helps you
Have a great day ahead