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Question
The method(s) by which corrosion can be prevented is/are:
The method(s) by which corrosion can be prevented is/are:
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Solution
The correct option is D By cathodic protection
Prevention of Corrosion:
Using paint or some chemicals: Prevent the surface of the metallic object to come in contact with the atmosphere. It is done by covering the surface with paint, grease, oil or some chemicals (bisphenol).
Protective coating: By covering the material surface by other metals Sn,Zn etc. that are inert or react
to save the material. Steel objects that must withstand the weather are coated with a layer of zinc. This process is called galvanisation.
Cathodic protection:A technique to control corrosion of a metal surface by making it work as a cathode of an electrochemical cell by placing in contact with the metal that is more easily oxidised (like zinc).
Prevention of Corrosion:
Using paint or some chemicals: Prevent the surface of the metallic object to come in contact with the atmosphere. It is done by covering the surface with paint, grease, oil or some chemicals (bisphenol).
Protective coating: By covering the material surface by other metals Sn,Zn etc. that are inert or react
to save the material. Steel objects that must withstand the weather are coated with a layer of zinc. This process is called galvanisation.
Cathodic protection:A technique to control corrosion of a metal surface by making it work as a cathode of an electrochemical cell by placing in contact with the metal that is more easily oxidised (like zinc).
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