Corrosion of metals in coal liquefaction processes. Final report
This report describes a research program which was conducted to determine the factors governing corrosivity of coal liquefaction process liquids to iron-base and nickel-base alloys. The principal objectives of the program were: to identify and measure concentrations of corrosive species present in coal liquefaction process liquids; and, to relate the concentrations of corrosive species in these liquids to the corrosion rates of iron-base and nickel-base alloys exposed in the liquids. Results of corrosion tests at 500/sup 0/F indicate that corrosion rates of alloys decrease as the chromium content of the alloys increases. Statistical analyses of tests on carbon steel at 500/sup 0/F indicate that the concentrations of phenols, water, water-soluble chlorides, and total nitrogen determine corrosion rate in a coal liquefaction process liquid. Tests in synthetic solutions and in coal liquids indicate that water-soluble amine hydrochlorides must be present for corrosion of carbon steel to occur and that the corrosion rate of carbon steel strongly depends upon the concentration of amine hydrochlorides in the liquid; other water-soluble chlorides (e.g., NaCl and CaCl/sub 2/) had no significant effect on the corrosion rate of carbon steel. Tests in synthetic solutions containing amine hydrochlorides show the effects of phenol, total nitrogen, the interaction between total nitrogen and phenol, and the interaction between water and total nitrogen to be statistically significant (at the 75% level) with respect to the corrosion rate of carbon steel.
- Research Organization:
- Metal Properties Council, Inc., New York (USA); Southwest Research Inst., San Antonio, TX (USA)
- DOE Contract Number:
- AC05-79ET13546
- OSTI ID:
- 5506933
- Report Number(s):
- DOE/ET/13546-T1; ON: DE84004874
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
AMINES
AROMATICS
CARBON STEELS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COAL LIQUEFACTION
COAL LIQUEFACTION PLANTS
CORROSION
CORROSIVE EFFECTS
DATA
EXPERIMENTAL DATA
FUNCTIONAL MODELS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LIQUEFACTION
NICKEL ALLOYS
NICKEL BASE ALLOYS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENOLS
PILOT PLANTS
STEELS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
WATER