Corrosion testing in coal preparation environments
Equipment that is used in coal preparation is subjected to various forms of corrosion and mechanical wear. The Kentucky Center for Energy Research Laboratory is conducting ongoing wear tests at TVA's Paradise coal preparation plant to measure the performance of typical metals of construction in various process areas of the plant. Results of a 2500 hour test are reported and compared to baseline results that were obtained from an earlier test. Comparison of data from these two tests indicate that wear results are reasonably reproducible within the operating variations of the plant. Stainless steel and high chromium cast iron samples experience low or negligible wastage rates. Low carbon steel, Cor-Ten A, Ni Hard 1 and Ni Hard 4 samples experienced significant wastage rates as a result of general corrosion attack due to the presence of dissolved oxygen in highly conductive process water. Localized corrosion was also observed in all samples except for the austenitic stainless steels. The highest wastage rates for almost all samples occurred in the location handling the largest-sized fraction of coal in the plant, indicating an added abrasive wear contribution. Long term testing in the plant continues.
- OSTI ID:
- 7230760
- Report Number(s):
- CONF-870314-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
AUSTENITIC STEELS
CARBIDES
CARBON COMPOUNDS
CARBON STEELS
CARBONACEOUS MATERIALS
CAST IRON
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COAL
COAL PREPARATION
COMPARATIVE EVALUATIONS
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON ALLOYS
IRON BASE ALLOYS
IRON CARBIDES
IRON COMPOUNDS
LOSSES
MATERIALS
NICKEL ALLOYS
STAINLESS STEELS
STEELS
TESTING
TRANSITION ELEMENT COMPOUNDS
WEAR