Relation between impurities and oxide-scale growth mechanisms on Ni-34Cr and Ni-20Cr alloys. II. Influence of sulfur

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Oxidation of Metals; (USA)

DOI:https://doi.org/10.1007/BF00667416· OSTI ID:6794477

Abderrazik, G B; Moulin, G; Huntz, A M ^[1]

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1. Universite Paris, Orsay (France)

The oxidation of presulfidized Ni-Cr alloys has been studied by taking into account the influence of the two distinct oxidation mechanisms described in part I of this article. Sulfur enters the Cr{sub 2}O{sub 3} scale (in Ni-34Cr alloys) mainly as S{sup 2{minus}} species, which at high temperatures increases the V{prime}{double prime}{sub Cr} content, and hence the oxidation kinetics. Sulfur is randomly distributed in the scale, except at the inner oxide-alloy interface, where intergranular microsulfides are analyzed in the oxide-scale zone. In the case of NiO, NiCr{sub 2}O{sub 4}, Cr{sub 2}O{sub 3} oxide multilayers (in a Ni-20Cr alloy), sulfur in the S{sup 2{minus}} state is distributed in the oxide layers or at Si-precipitate interfaces.

• OSTI ID: 6794477
• Journal Information: Oxidation of Metals; (USA), Journal Name: Oxidation of Metals; (USA) Vol. 33:3-4; ISSN 0030-770X; ISSN OXMEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOY SYSTEMS
ALLOYS
BINARY ALLOY SYSTEMS
CHEMICAL REACTIONS
CHROMIUM
CONTROL
CRACKS
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NONMETALS
NUMERICAL DATA
OXIDATION
SCALE CONTROL
SULFUR
TRANSITION ELEMENTS