.~ Pretreatment of substrate or post-treatment of coated substrate {9}
540
.~.~ Arc or electrical discharge
DEFINITION
Classification: 427/540
Arc or electrical discharge:
(under subclass 532) Processes wherein a luminous discharge of electricity, through a gas or vapor is applied directly to the substrate, which may be in the form of an electrode.
(1) Note. The 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. No sustained plasma is formed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
446, for the use of an arc to plasma spray.
SEE OR SEARCH CLASS
219, Electric Heating,
73.11, 73.21, and 76.14 for coating operations that involve a build-up of a metal coating on a metal workpiece and wherein an arc between an electrode and the work is utilized.
