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Rust forms when metals containing iron mix with the oxygen in the air or the water and create a compound named iron oxide. This compoumd has water molecules, so we call it a hydrated compound. Chemically and very simply speaking, iron atoms lose a few electrons to oxygen atoms. This process, where electrons are lost from atoms, is the oxidation process. When oxidation occurs it produces a chemical reaction that creates iron oxide

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13y ago

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Metal rusts because of a chemical reaction between oxygen and metal. This chemical reaction can be sped up in water.

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Wiki User

14y ago
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* Rust actually is a chemical reaction between a metal and moisture.

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Wiki User

17y ago
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The oxygen and water vapour react, salt speeds this up. Have you ever seen any bridges that rust? That is because they tower over salt water.

Oxygen+Water vapour->rust

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Wiki User

13y ago
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When Iron and Oxygen mix. This happens easier in water than air because air is only about 27% oxygen and water is around 33% oxygen.

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13y ago
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Rust is oxidized iron and occurs when oxygen chemically reacts with iron

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Wiki User

14y ago
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Rust is an iron oxide, the product of a oxidation-reduction (redox) reaction between iron and oxygen in the presence of water or air moisture.

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Wiki User

10y ago
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'Rust' is the everyday name for Iron Oxide (Fe2O3).

It forms when iron is in contact with both air and water.

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lenpollock

Lvl 16
1y ago
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Q: What is rust and how does it form?
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