Air ionisation is the most effective method of eliminating static charges on non-conductive materials and isolated conductors. Air ionisers generate large quantities of positive and negative ions in the surrounding atmosphere, which serve as mobile carriers of charge into the air. As ions flow through the air, they are attracted to oppositely charged particles and surfaces. Neutralization of charged surfaces can be rapidly achieved through the process.
Air ionisation may be formed using electrical ionisers, which generate ions in a process known as corona discharge. Electrical ionisers generate air ions through this process by intensifying an electric field around a sharp point until it overcomes the dielectric strength of the surrounding air. Negative corona occurs when electrons are flowing from the electrode into the surrounding air. Positive corona occurs as result of the flow of electrons from the air molecules into the electrode.