MHD generator electrode development. Summary report, July 1, 1981-September 30, 1982
Emphasis on this program was the development of and understanding wastage mechanism(s) of metallic electrodes which may be suitable alternatives to platinum anode material for use in long-term open cycle, coal-fired MHD generator operations. The laboratory tests simulate both modes of material wastage observed in MHD electrode operation; i.e., arc erosion (melting/vaporization) and electrochemical corrosion. Based on experimental results from the electrochemical tests at 1473/sup 0/K, the rank order listing of the materials tested for anode applications were platinum, E-Brite 26-1 modified with a five percent addition of platinum, chromium, IN 601, E-Brite 26-1, and 330 stainless steel ranked in decreasing order. The rank order listing based on the arc erosion test was platinum, chromium, E-Brite 26-1, 330 stainless steel, and IN 601. The relative arc erosion resistance of materials based on the AVCO Mark VII generator test results gave a rank order of platinum, 330 stainless steel, IN 601, and E-Brite 26-1. Engineering tests under simulated open-cycle coal-fired MHD operating conditions were performed in the 500 kW Westinghouse Electrode System Test Facility (WESTF). Tests were conducted on candidate metallic anode materials (cold wall) and ceramic anode (hot wall) materials. A ten-hour duration cold wall slagging test was conducted on platinum, E-Brite 26-1, 330 stainless steel and IN 601 and the results were similar to those obtained for those materials in the AVCO Mark VII generator tests. Non-slagging, super hot (>1700/sup 0/C) wall hafnia-rare earth oxide electrodes were tested in a sulfurous, western coal-fired MHD environment. All four ceramic electrode pairs were destroyed. 20 references.
- Research Organization:
- Westinghouse Electric Corp., Pittsburgh, PA (USA). Advanced Energy Systems Div.
- DOE Contract Number:
- AC22-79ET15529
- OSTI ID:
- 6201928
- Report Number(s):
- DOE/ET/15529-12; FE-15529-12; ON: DE85002156
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development, testing and evaluation of MHD materials and component designs. Quarterly report, July-September 1978
Corrosion and arc erosion in MHD channels
Related Subjects
COAL-FIRED MHD GENERATORS
ELECTRODES
MATERIALS TESTING
ANODES
CERAMICS
ELECTRIC ARCS
ELECTRICAL INSULATORS
ELECTROCHEMICAL CORROSION
EROSION
MATERIALS
MHD CHANNELS
OPEN-CYCLE MHD GENERATORS
PERFORMANCE TESTING
PLATINUM
SLAGS
STAINLESS STEELS
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
CURRENTS
DIRECT ENERGY CONVERTERS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
IRON ALLOYS
IRON BASE ALLOYS
METALS
MHD GENERATORS
PLATINUM METALS
STEELS
TESTING
TRANSITION ELEMENTS
300104* - MHD Generators- Duct Engineering & Fluid Dynamics