IMPRESSED CURRENT CATHODIC PROTECTION

Cathodic protection (CP) is a technique used to control thecorrosion of a metal surface by making it the cathode of an electrochemical cell. … For structures such as long pipelines, where passive galvanic cathodic protection is not adequate, an external DC electrical power source is used to provide sufficient current.

Cathodic protection is used all over the globe to protect pipelines, water treatment plants, above and underwater storage tanks, ship and boat hulls, offshore production platforms, reinforcement bars in concrete structures and piers, and more. Cathodic protection is often used to protect steel from corrosion.

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