Electrochemistry — Chemistry STD 12 Science — Question

→ Prevention of corrosion is of prime importance.
→ One of the simplest methods of preventing corrosion is to prevent the surface of the metallic object to come in contact with atmosphere.
→ This can be done by covering the surface with paint or by some chemicals (e.g. bisphenol) Another simple method is to cover the surface by other metals (Sn, Zn, etc.) that are inert or react to save the object.
→ An electrochemical method is to provide a sacrificial electrode of another metal (like Mg, Zn, etc.) which corrodes itselt but saves the object.