Cathodic Protection


What is Cathodic Protection

Cathodic protection is an electrochemical technique to prevent the corrosion that occurs on metallic materials placed in contact with aggressive environments , such as soils , seawater, fresh water, chemicals , concrete, etc…

How is the corrosion

The corrosion that trigger in metallic materials are of various types , including: – To stray currents or stray – To electrochemical reaction with the environment – To geological pile – For the galvanic cell

How does the “cathodic protection”

Cathodic protection is a technique of total blockage of the corrosion on the metal structure . Cathodic protection is to circulate a current between the anode of a sunken land and the structure to be protected; this current causes the lowering of the potential of the metallic material , thus reducing the corrosion rate up to a complete standstill.

How to apply cathodic protection

Cathodic protection is a technique completely non-invasive and can be applied to metal structures already buried , without any specific intervention on the latter. A cathodic protection system consists of a DC generator (power supply cathode ) , whose negative pole is connected to the structure to be protected simply by an electric cable , while the positive pole is connected to an anode made ​​to sink HOC with specific materials ( Fe-Si -Cr , Titanium, etc.). . The electric field generated by this circuit is sufficient to inhibit corrosion even for several Km of conduct.

Fields of application

The fields of application are varied , including:


  • Off-Shore Facilities
  • Sea Line
  • Port/Harbour Facilities
  • Ship Hulls


  • Rafineries
  • Industrial Establishments
  • Storage/Storerooms
  • Storage Facilities
  • Control and Automation/Computerization of the Commercial Systems


  • Gas Pipelines
  • Water Pipelines
  • Oil Pipel
  • Liquid Oxygen Pipeline
  • Tanks
  • Cable Ducts
  • Decompression Stations
  • Pump in/out Boxes


  • Bridges
  • Foundations for Buildings
  • Piling
  • Dams
  • Road Foundations
  • Load Bearing Frameworks