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Cathodic Protection

Cathodic Protection


Cathodic protection (CP) is a kind of electrochemical protection technology. The cathode protection (galvanic protection) is used to exert an impressed current on the metal surface, make it work as a cathode of an electrochemical cell, thus control the electronic migration of metal corrosion, and avoid or weaken the corrosion. Corroco cathodic protection mainly includes galvanic anode, impressed current anode, extruded anode for water heater, cathodic protection accessory (galvanic protection accessory).

Working Principle:

When the metal electrolyte solution corrosion system is affected by cathodic polarization, with the negative shift of electric potential, metal anode oxidation reaction overpotential decreases and the reaction rate decreases, thus metal corrosion rate decreases. This phenomenon is termed cathodic protection effect. The protective method of making use of this effect to reduce metal equipment corrosion is called cathodic protection (galvanic protection).


Cathodic protection (cathode protection) system is used to protect a wide range of metallic structures in various environments. Currently, cathodic protection (galvanic protection) technology is widely used in soil, steel water or fuel pipelines and storage tanks such as home water heaters, steel pier piles, ship and boat hulls, offshore oil platforms, onshore oil well casings and metal reinforcement bars in concrete buildings and structures. Besides, galvanic protection can be applied to galvanized steels, in which a sacrificial coating of zinc on steel parts protects them from rust.

Corroco International Industrial Co., Ltd is a professional manufacturer and supplier of cathodic protection in China. In addition to this galvanic protection of anti corrosion cathode system, we also produce anode rod for water heater, hydrometallurgical electrode, hydrometallurgical equipment, metallurgy technology and engineering, water valve, machining and parts, etc. With 12 years' production experience, our products have been exported to the United States, Canada, Britain, Germany, Iran, Pakistan, India, Kuwait, Dubai, Saudi Arabia, the Philippines, Malaysia, Singapore, Congo, Turkey, etc.