How is the future of cathodic protection eng?

Good prospects and the demand in the market is steady.
They are experts in their own field.
However there is not much growth for an individual.

 is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. 
A simple method of protection connects protected metal to a more easily corroded "sacrificial metal" to act as the anode.
The sacrificial metal then corrodes instead of the protected metal.
For structures such as long pipelines, where passive galvanic cathodic protection is not adequate, an external DC electrical power source is used to provide sufficient current.