Preventing corrosion of a pipeline by using special cathodes (and anodes) to circumvent corrosive damage by electric current. Also a function of zinc coatings on iron and steel drainage products - galvanic action.
A method of preventing oxidation (rusting) of exposed metal structures, such as bridges and pipelines, by imposing between the structure and the ground a small electrical voltage that opposes the flow of electrons and that is greater than the voltage present during oxidation.
One of several techniques to prevent corrosion of a metal surface by reversing the electric current that causes corrosion. A tank system can be protected by sacrificial anodes or impressed current (See sacrificial anodes and impressed current.).
The process in which a structural metal, such as iron, is protected from corrosion by connecting it to a metal that has a more negative reduction half-cell potential.
See sacrificial protection.
A method of preventing the corrosion or deterioration of underground pipe and connected equipment, through the control of electrolysis.
the connection of an active metal, such as magnesium, to steel to protect the steel from corrosion.
Method used to minimise rate of electrochemical corrosion of structures, for example, installations offshore, pipelines and storage tanks.
Systems that protect underground metal from corrosion by running small electrical currents along the metal. Most often used to protect well heads, oil, gas, and water pipelines.
a means of corrosion prevention whereby electrons are supplied to the structure to be protected from an external source such as anoother more reactive metal or a dc power supply.
A technique to prevent corrosion of a metal surface by making it the cathode of an electrochemical cell.
The measures taken to stop the flow of direct electrical currents from the pipeline to and through the soil in which it is buried.
A technique to reduce the corrosion rate of a metal by making it the cathode of an electrochemical cell. Thermal spray zinc and aluminium coatings provide this protection to steel substrates, the coating being the anode and the steel being the cathode.
a more active metal is placed next to a less active metal. The more active metal will serve as an anode and will be corroded instead of the less active metal. The anode is then called a sacrificial anode.
(1) Reduction of corrosion rate by shifting the corrosion potential of the electrode toward a less oxidizing potential by applying an external electromotive force. (2) Partial or complete protection of a metal from corrosion by making it a cathode, using either a galvanic or an impressed current. Contrast with anodic protection.
The reduction or prevention of corrosion of a metal surface caused by making it cathodic. This is accomplished by using a sacrificial anode (such as in zinc rich coatings or galvanizing) or by using impressed current.
Reducing the corrosion of a metal by making the particular surface a cathode of an electrochemical cell.
A method of preventing oxidation (rusting) of exposed metal structures, such as bridges and pipelines, by imposing a small electrical voltage that opposes the flow of electrons between the structure and the ground that is greater than the voltage present during oxidation.
Protection supplied by a sacrificial anode to prevent corrosion of other parts.
The sacrificial use of one metal (the sacrificial anode) to protect against the surface corrosion of another surface. Usually a galvanic cell is established by the more easily corroded sacrificial anode or by impressed current which causes the other metal surface to become cathodic and thereby protected.
Protection of a ship's hull against corrosion by superimposing on the hull an impressed current provided by a remote power source through a small number of inert anodes. Also accomplished by fitting aluminum, magnesium or zinc anodes in tanks or the underwater portion of a ship, which waste away by galvanic action.
A chemical process used to reduce corrosion on metal and metal alloy containers. Techniques such as wrapping in plastic, painting the surface, or placing a sacrificial anode (such as magnesium) to protect underground pipes and storage tanks against electrolysis or deterioration are examples.
the prevention of corrosion by making the metal to protect a cathode; this is because when corrosion occurs in an electrolyte, corrosion cells are set up causing electric currents to flow out from anodes to cathodes; the anodes give itself up or corrode and the cathodes receive current or get protected; on a ship, cathodic protection is applied on the ships hull, sea water piping system, ballast tanks, etc.
A corrosion control system in which the metal to be protected is made to serve as a cathode, either by the deliberate establishment of a galvanic cell or by impressed current. (See anode.)
Cathodic protection (CP) is a technique to control the corrosion of a metal surface by making that surface the cathode of an electrochemical cell.
