Active Cathodic Protection
https://en.wikipedia.org/wiki/Cathodic_protection
Definitions
| Electrode | A substance that is a good conductor of electricity. An electrode acts as a metallic contact through which the current enters and leaves an electrolyte. |
| Anode | An electrode where oxidation occurs. |
| Cathode | An electrode where reduction occurs. |
| Electrolyte | A solution that contains salts and minerals. This medium is electrically conductive (sea water, for example). These are made up of atoms and ions can either gain or lose electrons. Electrolytes are also called ionic solutions. |
| Oxidation |
A chemical reaction where an electrode loses electrons during the reaction. This results in loss of electrons, gain of oxygen or loss of hydrogen. |
| Reduction |
A chemical reaction where an electrode gains electrons. This results in gain of electrons, loss of oxygen or gain or hydrogen. |
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Redox (also known as oxidation-reduction) |
A chemical reaction that involves a transfer of electrons between two metals. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron. |
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Corrosion |
Corrosion of metal is a redox reaction in which a metal is oxidized naturally to its ions, resulting in partial or complete destruction of the metal. |
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Rust |
Rust is an iron oxide formed by the reaction of iron and oxygen in the presence of water and/or air moisture. |
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Cathodic Protection |
For example, when iron is in contact with water, it rusts. Rusting is an electrochemical process that begins when iron (Fe) is in contact with water, and loses its electrons to Oxygen (O2) in the water to form Ferrous Oxide. Ferrous oxide is the first step to corrosion.
