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How does a nail rust?

Updated: 8/9/2023
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12y ago

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The metal in the nail combines with the oxygen found in the air due to natural causes. Any part of the nail which is exposed to the oxygen can oxydize (rust).


Expose it to oxygen and water for a long period of time.

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12y ago
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7y ago

Nails are made of steel, and contain iron. Rust is the oxidation, or corrosion, which forms on iron when in contact with the oxygen in the air. The rate of corrosion is increased by moisture, salt, acids, or other chemicals. To prevent rusting, nails are sometimes coated with zinc, and these dull, grayish nails are referred to as "galvanized". Most rust consists of Iron (III) oxide (Fe2O3) and iron oxide-hydroxide. Similar oxidation forms the tarnish on silver and the green patina on copper and bronze.

It's because of a chemical process called oxidation. That is where oxygen combines with the iron, and the iron loses electrons.

Iron oxide has a lower free energy than do iron and oxygen. Just as a ball will roll downhill because it has a lower free energy at the bottom of the hill than at the top, iron will combine with oxygen - essentially 'rolling down a chemical reaction hill'. The reason things like water, salt, acids and other chemicals cause iron to rust faster, is that these substances act as catalysts to the oxidation reaction.

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13y ago

Most nails are made of steel. We know that steel is an alloy of iron and a bit of carbon (along with a bit of some other metals). Nails are often coated by the makers to inhibit rust, but when the coating fails, the steel is exposed to the elements or environment. Moisture and oxygen, which are present in air, attack exposed steel and form rust, and that's why a nail can rust.

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14y ago

By combinding moister and oxygen.Rust can come off ask that question.

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15y ago

a process called oxidation. oxygen in then air touches the iron on a nail and causes the iron to oxidize and form the rust

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13y ago

This is because of presence of water and air. A nail will not rust if there is no presence of air or water. If there is presence of water or air only, the nail would not rust. -CindyChan

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14y ago

Corrosion - h2o(water) and/or oxygen corrodes the nail slowly rusting and destroying it.

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14y ago

Nails made from Iron will try to return to a simpler state such as Iron Oxide or rust

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12y ago

iron combines with oxygen which produces water which makes rust after time

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