Cathodic protection
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Cathodic protection 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 protecte
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
An air cooled cathodic protection rectifier connected to a pipeline
Cathode
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A cathode is the electrode from which a conventional current leaves a polarized electrical device such as a lead–acid battery. This definition can be recalled by using the mnemonic CCD for cathode cur
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…
Glow from the directly heated cathode of a 1 kW power tetrode tube in a radio transmitter. The cathode filament is not directly visible.
Two indirectly-heated cathodes (orange heater strip) in ECC83 dual triode tube
Cold cathode (lefthand electrode) in neon lamp