When exposed to water and air, the chemical element aluminum, does not corrode. However, the truth of the matter is that the shell of aluminum responds so promptly with water that its shell should dissolve in the rain. Despite this fact, when aluminum metal is set in an atmosphere, a thin layer, known as aluminum oxide, forms on the metal's surface, making it resistant to rust. At the point when the external layer of aluminum oxide gets hydrated or wet, its molecular structure alters only enough to become chemically inert, which is why it resists
