Question

In order to protect underground pipelines and storage tanks made of iron, the iron is made the cathode of a voltaic cell through a process called ___________________.

	sacrificial anodization
	cathodic protection
	rusting
	galvanization

Answer 1

There are two methods which belongs to cathodic protection

a) one is by connecting the base metal with a more reactive metal and making the more reactive metal anode which sacrifices itself protecting the base metal [Iron in this case] : This is known as Sacrificial anodization protection

b) the second method is : Impressed current method where the base metal is connected to a battery in such a way that it starts behaving as cathode. This method is used in the given problem

In order to protect underground pipelines and storage tanks made of iron, the iron is made the cathode of a voltaic cell through a process called Impressed current method which is a kind of cathodic protection.