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What is rust?

Updated: 8/11/2023
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7y ago

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­R­ust is the common name for a very common compound, iron oxide. Iron oxide, the chemical Fe2O3, is common because iron combines very readily with oxygen, so readily, in fact, that pure iron is only rarely found in nature.

Iron (or steel) rusting is an example of corrosion, an electrochemical process involving an anode (a piece of metal that readily gives up electrons), an electrolyte (a liquid that helps electrons move) and a cathode (a piece of metal that readily accepts electrons). When a piece of metal corrodes, the electrolyte helps provide oxygen to the anode. As oxygen combines with the metal, electrons are liberated. When they flow through the electrolyte to the cathode, the metal of the anode is removed by the electrical flow or converted into metal cations in a form such as rust.

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7y ago
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11y ago

the slow reaction of an iron piece reacting with moisture

When Something stays in water and rust.

Rusting occurs when iron reacts with the oxygen in the air.

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11y ago

It is this redish crusty stuff that most likely grows on metal, sometimes on bricks, that all I have seen it on

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