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

Journal Article · Sat Apr 01 00:00:00 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-31-109-ENG-38
• OSTI ID: 5890165
• Journal Information: Oxid. Met.; (United States), Vol. 31:3-4
• Country of Publication: United States
• Language: English

Related Subjects

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