Abstract: Electrostatic spray apparatus including an electrode for generating a high-voltage corona, one or more sprayers for generating a spray of liquid droplets and for directing the droplets into the high-voltage corona whereby an electrical charge is imparted to the droplets. The conduit which supplies the liquid to the sprayers is electrically grounded so that liquid supplied to the sprayer device is at ground potential. The electrode is continuously maintained substantially clean and dry as it generates the high-voltage corona. A process for removing particulates from a gas stream is also disclosed.