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Author Topic: rusting and corrosion  (Read 4843 times)

Offline EvilFrog

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rusting and corrosion
« on: 15/08/2009 02:46:05 »
what is the different between rusting and corrosion? confuse....


 

Offline Chemistry4me

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rusting and corrosion
« Reply #1 on: 15/08/2009 04:10:44 »
Basically corrosion is more of a general term to mean the process of degradation of metals due to chemical reactions with its surroundings. Many metal corrosion produces a layer of metal oxide. When talking about corrosion of iron the results of the corrosion process is rust (iron oxides). Rust is formed by the reaction of iron and oxygen in the presence of water or air moisture.
 

Offline EvilFrog

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rusting and corrosion
« Reply #2 on: 15/08/2009 04:36:31 »
That mean corrosion will cause rusting?
 

Offline Chemistry4me

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rusting and corrosion
« Reply #3 on: 15/08/2009 10:16:24 »
The corrosion of iron causes rust to form.

 

Offline EvilFrog

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rusting and corrosion
« Reply #4 on: 15/08/2009 15:08:10 »
that mean only iron will rusting?
 

Offline DrChemistry

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rusting and corrosion
« Reply #5 on: 15/08/2009 15:50:59 »
Yes. Iron rusts because the term 'rust' is associated with the Iron oxides formed. It does not mean that it is the only metal which can disintegrate. Other metals can corrode. As a matter of fact, we may say that the process of rusting is a common type of corrosion occuring specifically to Iron.


Other metals corrode, but with different rate. Aluminum do not, for instance, corrode easily. Aluminum  produces a thin layer of Aluminum Oxide which protects it from corrosion. Nickel is sometimes used to produce stainless steal for cuttlery, due to its anti-corrosion properties.
« Last Edit: 15/08/2009 15:54:12 by DrChemistry »
 

Offline EvilFrog

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rusting and corrosion
« Reply #6 on: 18/08/2009 14:11:12 »
thanks !!
 

Offline DrChemistry

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rusting and corrosion
« Reply #7 on: 18/08/2009 20:26:43 »
No problem. I hope we all clarified things a little :-)
 

Offline vittorio

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rusting and corrosion
« Reply #8 on: 02/05/2010 08:48:51 »
i think that the image should be corrected. actually is oxygen dissolved in the water droplet that reacts with iron, the oxygen itself will not react directly with iron unless you're at very high temp and you have high temperature oxidation.

Vittorio

Mod edit - Link removed.  Please don't spam your site here.
« Last Edit: 01/06/2010 10:29:41 by BenV »
 

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rusting and corrosion
« Reply #8 on: 02/05/2010 08:48:51 »

 

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