Direct Current (DC)
Definition - What does Direct Current (DC) mean?
Direct Current, commonly known as DC is an electrical current that only flows in one direction, i.e., it is unidirectional. This type of current does not produce sinusoidal waves. The sources that produce direct current, also referred to as DC generators are mostly photovoltaic cells, batteries, electrochemical cells, and power supplies. The intensity of a direct current usually fluctuates periodically.
Petropedia explains Direct Current (DC)
Direct current is commonly found in many low voltage applications in the oil and gas industry. It is helpful to oil and gas companies in protecting steel infrastructure, equipment, and pipelines from corrosion. This current provides galvanic corrosion protection or the cathodic protection to the cost-intensive infrastructure used in the industry and thus, sometimes also referred to as galvanic current. Direct current that passes through the surface of steel is entirely resistive current. The direction of flow of a direct current charge must never reverse. The current can promote surface oxidation, which can be exhibited by metal loss based on Faraday's law.