The influence of electrode-fluorine reactions on corona and glow discharges in SF/sub 6/

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · IEEE Trans. Plasma Sci.; (United States)

DOI:https://doi.org/10.1109/TPS.1986.4316586· OSTI ID:5057621

MacGregor, S J; Woolsey, G A; Ogle, D B; Farish, O

In a sulphur hexafluoride (SF/sub 6/) discharge, regions of metal fluoride develop with time on the electrode surfaces as a result of chemical reaction between the electrode material and fluorine produced in the discharge. The influence of these fluorides on discharge behavior has been examined for several electrode materials: brass, copper, stainless steel, aluminum, and nickel, in SF/sub 6/ positive corona discharges at a pressure of 200 torr and in SF/sub 6/ glow discharges at a few torr. For observation and photography of the low-intensity corona discharges, an image intensifier system was used. For most of the electrode materials, the surface buildup of metal fluoride causes the structure of the discharges to be modified with time, and bright spots or filaments develop at the electrodes in times of the order of minutes. For nickel electrodes, the electrode-fluorine reaction is very slow, and little change in discharge behavior is observed, even after several hours. Nickel clearly represents the best choice of electrode material for any discharge device using a fluoride medium, particularly when uniformity and stability are required over long periods of time.

• Research Organization: Power Engineering Group, Dept. of Electronic and Electrical Engineering, Univ. of Strathclyde, Glasgow G1 1XW
• OSTI ID: 5057621
• Journal Information: IEEE Trans. Plasma Sci.; (United States), Journal Name: IEEE Trans. Plasma Sci.; (United States) Vol. PS-14:4; ISSN ITPSB
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400400* -- Electrochemistry
ALLOYS
ALUMINIUM
BRASS
CHEMICAL REACTION KINETICS
CHROMIUM ALLOYS
COPPER
COPPER ALLOYS
COPPER BASE ALLOYS
CORONA DISCHARGES
CORROSION RESISTANT ALLOYS
ELECTRIC DISCHARGES
ELECTRICAL PROPERTIES
ELECTRODES
ELEMENTS
FILAMENTS
FLUORIDES
FLUORINE COMPOUNDS
GLOW DISCHARGES
HALIDES
HALOGEN COMPOUNDS
IMAGE INTENSIFIERS
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
LOW PRESSURE
METALS
NICKEL
PHOTOGRAPHY
PHYSICAL PROPERTIES
REACTION KINETICS
STABILITY
STAINLESS STEELS
STEELS
SULFUR COMPOUNDS
SULFUR FLUORIDES
TIME DEPENDENCE
TRANSITION ELEMENTS
ZINC ALLOYS