Alloy 10 Al -- A new sulfidation and carburization resistant alloy for fuel combustion and conversion
Book
·
OSTI ID:268216
- Krupp VDM GmbH, Werdohl (Germany)
- Max-Planck-Inst. fuer Eisenforschung, Duesseldorf (Germany)
A new nickel-base high-temperature alloy, alloy 10 Al, which contains 30% iron, 10% aluminum and 8% chromium, has been developed. Alloy 10 Al has a lamellar eutectic two-phase microstructure with one phase being the intermetallic phase NiAl and the second phase being Ni(Fe,Cr) solid solution. The high-temperature corrosion behavior of the new alloy has been determined in both air and hot process gases containing methane, sulfur dioxide and hydrogen sulfide, respectively. It was found that the corrosion resistance against carburization, sulfidation and oxidation was excellent due to the formation of a dense protective alumina scale. The adherence of the alumina scale was increased by an addition of 0.1% hafnium. The concentration of chromium was found to have a remarkable impact on oxidation and high temperature corrosion resistance. Alloys without chromium showed an increased corrosion rate in both air and sulfur-containing gas atmospheres due to the initial formation of nickel oxides. In sulfidizing gases at least 4% chromium are required to stabilize the formation of alumina and to prevent the formation of nickel/sulfur compounds.
- OSTI ID:
- 268216
- Report Number(s):
- CONF-960389--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
02 PETROLEUM
36 MATERIALS SCIENCE
42 ENGINEERING
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
CARBURIZATION
CHEMICAL REACTORS
CHROMIUM ALLOYS
COAL GASIFICATION
COMBUSTION
COMBUSTORS
CONVERSION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
EXPERIMENTAL DATA
FOSSIL FUELS
HAFNIUM ADDITIONS
HYDROGEN SULFIDES
IRON ALLOYS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METHANE
NICKEL BASE ALLOYS
OXIDATION
PETROLEUM REFINERIES
PHASE STUDIES
PROTECTIVE COATINGS
SULFIDATION
SULFUR DIOXIDE
02 PETROLEUM
36 MATERIALS SCIENCE
42 ENGINEERING
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
CARBURIZATION
CHEMICAL REACTORS
CHROMIUM ALLOYS
COAL GASIFICATION
COMBUSTION
COMBUSTORS
CONVERSION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
EXPERIMENTAL DATA
FOSSIL FUELS
HAFNIUM ADDITIONS
HYDROGEN SULFIDES
IRON ALLOYS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METHANE
NICKEL BASE ALLOYS
OXIDATION
PETROLEUM REFINERIES
PHASE STUDIES
PROTECTIVE COATINGS
SULFIDATION
SULFUR DIOXIDE