Impressed Current Cathodic Protection Principle

Impressed current cathodic protection systems have the benefit of using an external power supply to drive current.

Impressed current cathodic protection principle. The principle of cathodic protection is to create a potential gradient opposing the flow of electrons from the surface to be protected. The other method that can be used to apply cathodic protection is called an impressed current system. Cathodic protection is the use of dc current from an external source to oppose the discharge of corrosion current from anodic areas of the structure. This makes it possible to protect virtually any structure regardless of size or current requirements using long life anodes and enough appropriately sized power supplies.

The main difference between impressed current cathodic protection iccp and passive cathodic protection cp is the presence of an external power supply. We can follow maintain and fix issues from shore. Principle of cathodic protection the principle of the cathodic protection system is determining the anode in a large corrosion cell for making the intended material as cathode overcoming smaller corrosion cells. Thomas edison experimented with impressed current cathodic protection on ships in 1890 but was unsuccessful due to the lack of a suitable current source and anode materials.

Lets discuss the practical operation of impressed current cathodic protection. It would be 100 years after davy s experiment before cathodic protection was used widely on oil pipelines in the united states 5 cathodic protection was applied to steel gas pipelines beginning in 1928 6 and more. Extensive checking and control options are directly connected to the vessel management system. Its prevention by cathodic protection is also an electro chemical process.

The control panel provides the current necessary to polarise the surface to be protected. One of the methods of doing this is by using an impressed current cathodic protection system. Our systems are smart. Our state of the art iccp impressed current cathodic protection system will protect your assets.

The setup is represented in this slide. Impressed current cathodic protection iccp iccp systems uses an external source of electrical power provided by a regulated dc power supply often referred to as control panel. Both corrosion protection systems however operate on the same basic concept of bimetallic galvanic corrosion. The power to the unit is fed from the 440v ac 60 hz 3 phase supply.

As you know when two metals having different electrode potentials come into contact in an electrolyte then one will become anode and other act as cathode.