Coating for the breakdown of corona effluents

A corona charging device useful in an electrostatic marking system comprising in an operative arrangement a metallic housing, at least one corona generating electrode positioned within said housing, a bond coat and a porous TiO2 coating on at least a portion of said metallic housing, said bond coat enabled to enhance adhesion of said TiO2 coating on said metallic housing, said electrode enabled to deposit an electrical charge on a photoreceptor surface used in said marking system, said porous coating enabled to capture and neutralize amounts of any effluents created by said corona generating electrode that are located in an environment of said corona generating electrode and said photoreceptor, said porous coating being a thermally plasma sprayed coating which enables said coating to have an increased ability to reduce and neutralize said effluents present during or after a charging step.

A corona charging device useful in an electrostatic marking system, said device comprising in an operative arrangement a u-shaped aluminum housing, at least one corona generating electrode positioned within said housing, a bond coat, and a substantially porous TiO2 coating on at least an inside portion of said housing, said bond coat positioned between said housing and said TiO2 adhesion to said housing and also adapted to increase said TiO2 coatings' resistance to cracking and defects, said corona generating electrode enabled to deposit an electrical charge on a photoreceptor surface used in said marking system, said porous coating enabled to capture, reduce and neutralize amounts of any effluents created by said corona generating electrode that are located in an environment of said corona generating electrode, said corona charging device and said photoreceptor, said porous coating being a thermally plasma sprayed coating having a thickness of from 20-40 microns and a pore size of at least 0.1 microns.