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CORROSION / RUSTING

Corrosion is an electrochemical process in which anode and cathode develop on the metal surface due to which transfer of electrons occur.As a result metal converts into oxides ,hydroxides and sulphides. This causes degradation of the metal surface . In case of IRON it is called RUSTING .Rust is hydrated ferric oxide(Fe2O3.xH2O). It is a surface phenomenon. This lecture also explains the mechanism of rusting, examples of corrosion,methods of prevention of corrosion and also factors which accelerates the process of corrosion. Correction:--In the lecture I have said that Aluminium is non-corrosive but actually aluminium is highly reactive so it forms an oxide layer over its surface thus prevents corrosion of metal.So,actually we can't say that aluminium is non -corrosive(kindly note). let's learn........