Electrical Corona Discharge in India

Electrical Corona Discharge Treatment for Indian Manufacturers

Classical electrical corona discharge (dielectric barrier discharge) — used by plastics manufacturers in India and worldwide — is obtained using a generator and electrode(s) connected to a high-voltage source, a counter electrode at potential zero and a dielectric used as a barrier. That is, a high-frequency, high-voltage discharge (step-up transformer) creating a potential difference between two points requiring earth ground 35+kV and 20-25kHz. Custom electrode configurations allow for treating many different surface geometries – flat, contoured, recessed, isolated, etc. One application example is a corona discharge treating system for electrical connectors in which a combination of pin and ball electrodes concomitantly treats 3D small diameter holes and flat exterior surfaces, US Patent US5051586 (1991)2. Ozone is produced in the plasma region as a result of the electrical discharge. Corona discharge has been found to be reasonably effective at cleaning the invisible hydrocarbon materials present after, e.g., solvent or detergent washing.

Myth: Atmospheric plasma is a low-cost replacement technology for corona discharge.

Fact: Corona discharge often is more effective for treating larger surface areas and at greater surface depth. In fact, many atmospheric plasma systems are more expensive.

Atmospheric Plasma

Flame Plasma

UV Radiation Ozone

Pyrosil Flame Plasma

Fluorooxidation

Electrical Air Plasma

Cold Gas Plasma

Chemical & Mechanical

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