Breakdown of chromium oxide scales in sulfur-containing environments at elevated temperatures

Journal Article · Fri Mar 31 23:00:00 EST 1989 · Oxid. Met.; (United States)

DOI:https://doi.org/10.1007/BF00846691· OSTI ID:5890165

Baxter, D J; Natesan, K

Structural Fe-Cr-Ni alloys may be rapidly degraded in oxygen-sulfur mixed-gas environments at elevated temperatures unless protective oxide scales can be formed and maintained. The breakaway corrosion process was examined in model alloys of Fe-25 wt.% Cr-20 wt.% Ni with and without Nb and Zr additions. Oxide scales were preformed in S-free environments and subsequently exposed to oxygen-sulfur mixed-gas atmospheres. Preformed scales were found to delay the onset of breakaway corrosion. The beneficial effects of refractory metal additions were achieved via formation of a barrier layer at the Cr/sub 2/O/sub 3/-alloy interface.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5890165
• Journal Information: Oxid. Met.; (United States), Journal Name: Oxid. Met.; (United States) Vol. 31:3-4; ISSN OXMEA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALLOYS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
CHROMIUM SULFIDES
CHROMIUM-NICKEL STEELS
COAL GASIFICATION
COATINGS
COHERENT SCATTERING
CORROSION
CORROSION PRODUCTS
CORROSIVE EFFECTS
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
GASIFICATION
GRAVIMETRIC ANALYSIS
HIGH ALLOY STEELS
ION MICROPROBE ANALYSIS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
IRON OXIDES
IRON SULFIDES
KINETICS
MASS SPECTROSCOPY
MATERIALS TESTING
METALLURGICAL EFFECTS
METALS
MICROANALYSIS
MICROSCOPY
NICKEL ALLOYS
NIOBIUM
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NONDESTRUCTIVE ANALYSIS
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PROTECTIVE COATINGS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SCALING
SCANNING ELECTRON MICROSCOPY
SCATTERING
SPECTROSCOPY
STAINLESS STEELS
STEELS
SULFIDATION
SULFIDES
SULFUR
SULFUR COMPOUNDS
TEMPERATURE EFFECTS
TESTING
THERMAL ANALYSIS
THERMAL DEGRADATION
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE
X-RAY DIFFRACTION
ZIRCONIUM
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
ZIRCONIUM SULFIDES