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Introduction & Information

Cathodic protection (CP) is a technique to control the corrosion of a metal surface by making that surface the cathode of an electrochemical cell. It is a method used to protect metal structures from corrosion.


Cathodic protection systems are most commonly used to protect steel, water/fuel pipelines and storage tanks; steel pier piles, ships, offshore oil platforms and onshore oil well casings. Cathodic protection systems are widely used, particularly with engineering structures such as building reinforcement and buried metallic pipeline and cables. Cathodic protection devices protect structures and metalwork from corrosion, making the metal surface to be protected by a cathode element in a path of electric current, encouraging corrosion to form elsewhere in the circuit in a less critical or cheaper (anode) material.



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