(a) Define corrosion, what name is given to the corrosion of iron? (b) Name the colour of coating formed on silver and copper articles, when exposed to air? (c) List two damages caused by corrosion and suggest how corrosion can be prevented. (d) How corrosion can be advantageous?
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Corrosion is the deterioration of a metal as a result of chemical reactions between it and the surrounding environment
rusting of iron
(b) black colour of coating is formed on silver and green colour of coating on Cooper when exposed to air
(c) damages are :
(1) quality is lost
(2) shineness is lost
how corrosion can be prevented
(1) one simple way to prevent corrosion is to use a corrosion resistant metal such as aluminium and stainless steel.
(2) the application of painting is a most effective way to prevent corrosion
(d) advantage of corrosion are as follows:
(1)Protection : Surface corrosion forms an oxide layer which further protects the inner metal form corrosion
(2)Corrosion prevents corrosion : Some metals like zinc are used as sacrificial anodes to prevent corrosion to other metal.
(
(3)Galvanic corrosion : The principle on which primary batteries work. In which one metal corrodes preferentially to another when both metals are in electrical contact, in the presence of an electrolyte.
rusting of iron
(b) black colour of coating is formed on silver and green colour of coating on Cooper when exposed to air
(c) damages are :
(1) quality is lost
(2) shineness is lost
how corrosion can be prevented
(1) one simple way to prevent corrosion is to use a corrosion resistant metal such as aluminium and stainless steel.
(2) the application of painting is a most effective way to prevent corrosion
(d) advantage of corrosion are as follows:
(1)Protection : Surface corrosion forms an oxide layer which further protects the inner metal form corrosion
(2)Corrosion prevents corrosion : Some metals like zinc are used as sacrificial anodes to prevent corrosion to other metal.
(
(3)Galvanic corrosion : The principle on which primary batteries work. In which one metal corrodes preferentially to another when both metals are in electrical contact, in the presence of an electrolyte.
ujjvalkakadia:
aluminium is not corrosion resistance mam
it even corrode and forms an oxide layer on itself
due to which we can store HCl in it
yeah it corrode and makes a layer of oxide which is unreactive but it is counted in corrosion reactant because it protects itself from being corrode after making a layer of aluminium oxid
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corrosion is the process in which an substance undergoes degradation of makes some compounds which are different from the original state of that substance
rusting is the name given to corrosion of iron
colour coating is black as both silver (Ag)and copper(Cu) reacts with atmospheric oxygen and make compounds like copper oxide and silver oxide
damages is that due to corrosion the mass substance is reduced and it makes the material more weaker
u can prevent it by applying a coat of anything which prevents it to react with the other reactant due to which our material undergoes corrosion
eg u can paint iron to prevent it from rusting
it can be advantageous as if cu and ag forms a layer of oxide on then it can be further prevent them from corrosion as that layer is itself inert and hence your material will not corrode further
if u are satisfied pls mark me as brainliest and follow me hope this helps u
rusting is the name given to corrosion of iron
colour coating is black as both silver (Ag)and copper(Cu) reacts with atmospheric oxygen and make compounds like copper oxide and silver oxide
damages is that due to corrosion the mass substance is reduced and it makes the material more weaker
u can prevent it by applying a coat of anything which prevents it to react with the other reactant due to which our material undergoes corrosion
eg u can paint iron to prevent it from rusting
it can be advantageous as if cu and ag forms a layer of oxide on then it can be further prevent them from corrosion as that layer is itself inert and hence your material will not corrode further
if u are satisfied pls mark me as brainliest and follow me hope this helps u
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