Anode - An electrode at which oxidation of the surface or some component of the solution is occurring. Practically, this is the electrode at which corrosion occurs.
Ampere - The practical unit of electrical current equal to that produced by one volt applied across a resistance of one ohm.
Ampere-hour - The unit quantity of electricity equal to that produced by one ampere of current in a one hour period.
Cathode - An electrode at which reduction is occuring. Practically, this is the electrode at which protection occurs in a cathodic protection system.
Corrosion - The deterioration of material, usually metal, from a reaction with its environment.
Current Density - The applied electrical current per unit area.
Electrolyte - The common environment with which both a cathode and anode are in contact. Practically, this is the soil or water to which a metal structure is exposed.
Galvanic Anode - A metal that provides cathodic protection when connected to other metals, as a result of its relative position in the Galvanic Series.
Galvanic Series - A listing of metals in order of reactivity when exposed to an electrolyte.
Impressed Current Cathodic Protection - A cathodic protection system derived from the application of external electrical energy from sources such as common electrical power, thermoelectric generators, and solar panels.
Ohm - The practical unit of electrical resistance equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere.
Sacrificial Cathodic Protection - A cathodic protection system derived from the internal electrical energy developed by coupling to more reactive metals such as aluminum, magnesium, and zinc.
Volt - The practical unit of electrical potential difference required to produce a current flow of one ampere across a resistance of one ohm.
Courtesy of CP Design Center by MESA Products, Inc.