Corrosion and arc erosion in MHD channels
The objective of this task is to study the corrosion and arc erosion of MHD materials in a cooperative effort with, and to support, the MHD topping cycle program. Materials tested in the Avco Research Laboratory/Textron facility, or materials which have significant MHD importance, will be analyzed to document their physical deterioration. Conclusions shall be drawn about their wear mechanisms and lifetime in the MHD environment with respect to the following issues: sulfur corrosion, electrochemical corrosion, and arc erosion. The impact of any materials or slag conditions on the level of power output and on the level of leakage current in the MHD channel will also be noted, where appropriate. The detailed correlation and analysis of data obtained from nearly all of the CDIF tests performed since 1986 has shown that the apparent leakage current flowing through the slag on the channel walls depends upon channel operating parameters in an unexpected way. A comprehensive report of the results obtained to date and a first attempt at their interpretation has been prepared and a copy is attached. The second activity has concerned the examination of electrodes (platinum anodes/tungsten cathodes) by SEM and EDX techniques to determine the nature of the surface degradation. Results of these examinations are reported.
- Research Organization:
- Montana State Univ., Bozeman, MT (USA). Dept. of Mechanical Engineering
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- AC22-84PC70507
- OSTI ID:
- 6602403
- Report Number(s):
- DOE/PC/70507-T3; ON: DE90017889
- Country of Publication:
- United States
- Language:
- English
Similar Records
Corrosion and arc erosion in MHD channels
Corrosion and arc erosion in MHD channels. Quarterly progress report, July--September 1991
Related Subjects
300103* -- MHD Generators-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ANODES
CATHODES
CHEMICAL REACTIONS
COPPER ALLOYS
CORROSION
DOCUMENT TYPES
ELECTRODES
ELEMENTS
EROSION
FLUIDS
GASES
METALS
MHD CHANNELS
PLATINUM
PLATINUM METALS
PROGRESS REPORT
TRANSITION ELEMENTS
TUNGSTEN ALLOYS
TUNGSTEN BASE ALLOYS
VAPORS
WATER VAPOR
WEAR