Environmental medium analysis of cathodic protection system

The cathodic protection system works through the electrochemical battery, which is composed of cathode, anode, environmental medium and cable as electrolyte, so it is also called electric protection. The loop resistance has an important influence on the size and distribution of the current passing through. People always hope that the current from the anode in the cathodic protection system will pass through the environmental medium as much as possible, and reach the metal surface evenly. This is the current efficiency and current distribution of protection current.


Environmental medium is one of the main resistance components in the current loop of cathodic protection system. The function of environmental medium as an electrolyte is to conduct current first, but it is also a resistance body that hinders or affects the current passing through. The resistivity of different environmental media varies greatly, which has a significant impact on cathodic protection design, equipment selection and investment.


Environmental media also provide and carry cathodic protection reagents and diffusion reaction products. Thus, the cathodic reaction or anode reaction in the electrochemical cell is accelerated or inhibited, thus affecting the effective operation of the cathodic protection system. It can also be considered that the conductivity of environmental media is often the controlling factor for the corrosion process of metal structures and the effectiveness of cathodic protection.


The type, structure, composition and distribution of environmental media will have an important impact on the effective operation of cathodic protection system, generally through the influence of electrode reaction and dielectric conductivity. The former works through the formation and development of electrochemical micro cell and macro cell, while the latter works through the influence of polarization and current efficiency.


Shandong Linyi Bosi conductive materials Co., Ltd. is a high-tech enterprise specializing in the production of MMO flexible anode, conductive polymer flexible anode and titanium coated anode, mainly providing cathodic protection technology, engineering design, installation and technical services.