Behavior of some high-temperature alloys under simulated erosion-corrosion environments

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:83062

Kloewer, J; Brill, U ^[1]; Agarwal, D C ^[2]

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1. Krupp-VDM GmbH, Werdohl (Germany)
2. VDM Technologies, Houston, TX (United States)

Although material wastage by combined erosion-corrosion attack is well-known in a variety of commercial high-temperature processes like coal gasifiers, stationary and flying gas turbines, fluidized bed combustion, industrial furnaces and other high-temperature heat-treatment furnaces, less information is available on material-related parameters and low velocity environments typical for industrial furnaces. Consequently the aim of the present paper is to introduce a newly developed erosion-corrosion testing facility enabling investigations in a wide range of velocities and to provide first test results on the influence of alloying elements with special emphasis on the oxide forming elements like chromium, aluminum and silicon on erosion-corrosion resistance. Six alloys 600H, 690, 800H, 602CA, 45TM and Ni{sub 3}Al were tested in order to find a ranking in the combined erosion-corrosion environment. The experimental test results reveal that the mechanism of metal degradation under combined erosion-corrosion attack at low particle velocities is dominated by metal wastage by removal of oxide scales with subsequent regrowth by oxidation. The resistance of the alloys against erosion-corrosion increased with increasing aluminum content. Independent of the particle velocities, the nickel aluminide showed the best performance followed by alloy 602CA and the iron-base alloy 800H.

• OSTI ID: 83062
• Report Number(s): CONF-940222--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
ALUMINIUM
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
COAL
COAL GASIFICATION
CORROSION
CORROSION PRODUCTS
CORROSIVE EFFECTS
EROSION
EXPERIMENTAL DATA
FLUIDIZED-BED COMBUSTORS
HEAT RESISTING ALLOYS
INCOLOY 800H
INCONEL 600
INCONEL 690
IRON ALLOYS
METALLURGICAL EFFECTS
NICKEL BASE ALLOYS
PASSIVATION
PROTECTIVE COATINGS
REMOVAL