Corrosion resistance of alloy 803 in environments applicable to fossil energy systems

Conference · Wed Nov 01 04:00:00 EST 1995

OSTI ID:124448

Ganesan, P; Smith, G D; Tassen, C S ^[1]

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1. Inco Alloys International, Huntington, WV (United States)

Alloy 803 was developed for applications in the chemical process industries such as ethylene pyrolysis that require enhanced resistance to oxidation and carbonation. In addition to carburization resistance, ethylene pyrolysis furnace tube alloys must also possess adequate stress rupture strength. In environments containing mixed oxidants (oxygen and sulfur), and a high carbon activity such as coal combustion systems, it is known that accelerated oxidation/sulfidation is generally preceded by carburization. An alloy that has a superior oxidation and carburization resistance, would be expected to perform better in environments containing mixed oxidants. This paper will present corrosion performance data for the newly developed alloy in a mixed oxidant environment as well as oxidation and carburization environments. In the case of carburization tests, experiments were conducted to study the effect of carburization on the stress rupture strength of alloy 803 by exposing the stress rupture test specimens in H{sub 2}-5.5 % CH{sub 4}-4.5% CO{sub 2} for 300 hours at 982 C (1,800 F) and then stress rupture testing at 982 C/20.7 MPa (1800 F/3ksi). The results of these tests and other mechanical properties will be presented and compared with alloy HPM, an alloy that is also used for ethylene pyrolysis tubing. Suitable filler metals and welding electrodes to join alloy 803 will also be covered.

• OSTI ID: 124448
• Report Number(s): CONF-950304--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
36 MATERIALS SCIENCE
CARBON DIOXIDE
CARBURIZATION
CORROSION
HYDROGEN
HYDROGEN SULFIDES
INCOLOY ALLOYS
MATERIALS
MECHANICAL PROPERTIES
METHANE
MORPHOLOGY
OPTICAL MICROSCOPY
OXIDATION
PETROCHEMICAL PLANTS
SULFIDATION
WELDABILITY