Corona discharge is a type of electrical discharge that occurs when high voltage breaks down the insulation of air. Other types of electrical discharges include spark discharge, glow discharge, and arc discharge. Corona discharge is used in familiar places such as copy machines, ionizers, and air purification by electrostatic precipitation. Corona discharge in the air is accompanied by the generation of corrosive gases such as ozone and nitric oxide, which are harmful to the human body and require caution. It is also sometimes used to modify the surface of materials such as resin, paper, metal, and rubber.

A high-voltage power supply is used for corona discharges and corona generators.

Related words:
  • Corona charging/discharging supplies
  • Corona charging supplies
  • Polymer and ceramic corona charging