The effect of preoxidation on the sulfidation of Ni-20Cr (2-5)Al alloys. 2. Effect of sulfidation temperature and time

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Oxidation of Metals; (United States)

DOI:https://doi.org/10.1007/BF01151588· OSTI ID:5465379

Kim, S W; Ohla, K; Fischmeister, H; Fromm, E ^[1]

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1. Max-Planck-Inst. fuer Metallforschung, Stuttgart (West Germany)

The effect of preoxidation in H{sub 2}/HG{sub 2}O and in dry H{sub 2} on the sulfidation resistance of Ni-20Cr-Al alloys with 2, 3.5, and 5 wt% Al has been investigated. The samples were sulfidized 4 hr in H{sub 2}/5% H{sub 2}S at 750, 800, and 850C. Best results were obtained for the Ni-20Cr-5Al alloy pretreated for 100 hr at 1,000C in dry H{sub 2}. The sulfidation reaction in H{sub 2}/5% H{sub 2}S was retarded strongly by this treatment for a period of 4 hr at 850C and of 15 hr at 750 C. Although less pronounced, preoxidation of alloys with lower Al contents or pretreatment in H{sub 2}/H{sub 2}O show positive effects as well.

• OSTI ID: 5465379
• Journal Information: Oxidation of Metals; (United States), Journal Name: Oxidation of Metals; (United States) Vol. 36:5-6; ISSN 0030-770X; ISSN OXMEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COATINGS
CORROSION RESISTANCE
DATA
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
NICKEL ALLOYS
NICKEL BASE ALLOYS
NONMETALS
NUMERICAL DATA
OXIDATION
PROTECTIVE COATINGS
SULFIDATION
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TIME DEPENDENCE
VAPORS
WATER VAPOR
WEIGHT MEASUREMENT