I learned that rust is the oxide form of a metal that reacts with oxygen in the atmosphere.

a.

Corrosion is the oxidation of a metal to its oxide (or sulfide) due to the affect of the atmosphere around it.

b.

Corrosion is the oxidation of a metal to its oxide (or sulfide) due to the affect of the atmosphere around it. Corrosion of iron metal is called rusting.

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a.

Rust is the product formed by the oxidation of iron metal by atmospheric oxygen.

b.

The process of rusting is affected by humidity of air, acidity in air, presence of an electrolyte.

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Aluminum metal has a property than when exposed to atmospheric oxygen, it forms a layer of oxygen on its surface that prevents it from reacting with the environment around it. Therefore, the aluminum can will not have rusted at all even after being exposed to the harsh weather. On the other hand, steel is an alloy of iron and this iron will react with atmospheric oxygen in presence of water to rust. Therefore, after a week the steel can would have rusted while the aluminum can will not have rusted.

Only iron can will rust.

Iron rusts when it comes in contact with oxygen and water. Presence of electrolytes (salt dissolved in water) speed up this process. Therefore, before applying the rust-proofing product it is essential that the car is clean so that it does not have any electrolyte on its surface and dry so that it does not have any water on its surface.

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Caribbean islands are small pieces of land surrounded by the salty waters of the Atlantic ocean. This means that air on the islands is saturated with salty water. Salt water accelerates the rusting process of the iron metal in the presence of water and oxygen. Therefore, automobiles bodies made up of mostly iron metal are more likely to rust quickly on the Caribbean islands than in Canada.

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Galvanized steel is better for outdoor use as this steel is coated with zinc to prevent it from rusting. Zinc being more reactive than iron, rusts first and converts to zinc oxide. This layer of oxide forms a protective barrier between the steel and atmospheric oxygen and water and hence prevents it from rusting.

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