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Rust is made when iron reacts with water and air. So, obviously the process is quicker with water as it doesnt have to use water vapour in the air.

to break it down:

rusting in a formula form is this

2Fe(s) + 2H2O(l) + O2(g) ==> 2Fe2+(aq) + 4OH-(aq)

Fe2+(aq) + 2OH-(aq) ==> Fe(OH)2(s)

Fe(OH)2(s) =O2=> Fe(OH)3(s)

Fe(OH)3(s) =dehydrates=> Fe2O3.nH2O(s)

basically what is happening is 2 iron is reacting with 2 water and 1 oxygen to form 2 iron ions and 4 hydroxide ions then they react and form iron(II)hydroxide which oxidizes to form iron(III)hydroxide whic dehydrated to form rust ( Fe2O3.nH2O) which is obviously solid. its quite a complicated process but the steps are quite easy to follow.

hope this helps =D

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13y ago
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14y ago

Damp, or wet weather will speed "oxidation", or rusting. Acid rain caused by pollution will further speed up the process.

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12y ago

rain and any type of precipitation

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Q: When does rusting occur at a fast rate?
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Related questions

Can rusting of iron occur in distelled water?

yes,rusting of iron can occur in distilled water.In fact it occur even very fast because ionic content in distilled water is very less.So,rusting of iron occur in distilled water.


Will rusting occur in boiled water?

Rusting will occur in boiled water but at a very slow rate. This is mainly due to the fact that water which is boiled is said to be de-ionized.


Effects of salt on the rate of rusting?

The rate of rusting increases with the presence of salt.


What are the conditions necessary for rusting?

The conditions necessary for rusting are water (or water vapour) and air, specifically Oxygen. If one condition is absent and the other is present then rusting would not occur but if both are present then rusting will occur


Under what conditions will rusting not occur?

Rust will not occur where it is dry and humid


How fast did the Titanic rust?

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Difference between rusting and combustion?

Rusting is much slower than combustion, and rusting in the strictest sense can occur only with iron or its alloys.


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Is there any difference between rusting and combustion since both involve oxidation?

Differences:RUSTING :Rusting is a slow process.Little heat is released.Both air and moisture are necessary for rusting.COMBUSTION:Burning is fast oxidation.large amounts of heat are released.Only air is necessary for combustion.In other words, Rusting is much slower than combustion, and rusting in the strictest sense can occur only with iron or its alloys.


What type of energy causes rusting to occur?

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Can rusting of iron occur in distilled water?

Yes, rusting of iron occurs in distilled water. In fact, the rusting is faster since, the ionic content in distilled water is lesser.


Which type of gas does rusting require?

The gas that is required to allow rusting to occur is Oxygen