(under subclass 457) Processes wherein the deposition of the coating material involves the use a luminous discharge of electricity, through a gas or vapor, between two electrodes of which one may be the substrate.
(1) Note. An arc discharge is a type of electrical conduction in gases characterized by high current density and low potential drop. It is closely related to the glow discharge, but has a much lower potential drop in the cathode region, as well as a greater current density, wherein no sustained plasma is formed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
446, for the use of an arc to coat with plasma spray.
562, for the use of an arc to pretreat the coating supply or source.
SEE OR SEARCH CLASS
219, Electric Heating,
73.11, 73.21, and 76.1+ for coating operations that involve a build-up of metal coating on a metal workpiece and wherein an arc between and electrode and the work is utilized.
