Cathodic protection

Aluminium sacrificial anodes (light colored rectangular bars) mounted on a steel jacket structure.

Zinc sacrificial anode (rounded object) screwed to the underside of the hull of a small boat.

Galvanic sacrificial anode attached to the hull of a ship, showing corrosion.

Simple impressed current cathodic protection system. A source of DC electric current is used to help drive the protective electrochemical reaction.

Cathodic protection (CP) is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. A simple method of protection connects the metal to be protected to a more easily corroded "sacrificial metal" to act as the anode. The sacrificial metal then corrodes instead of the protected metal. 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.

单词	Cathodic disbonding
释义	Cathodic disbonding 英语百科 Cathodic protection Cathodic protection (CP) is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. A simple method of protection connects the metal to be protected to a more easily corroded "sacrificial metal" to act as the anode. The sacrificial metal then corrodes instead of the protected metal. 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.
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Cathodic disbonding

Cathodic protection