ISSN:
1573-4889
Keywords:
oxidation
;
sulfidation
;
Fe-Cr-Ni alloys
;
Nb addition
;
Zn addition
;
breakaway corrosion
;
mixed-gas atmospheres
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract 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-25wt.% Cr-20wt.% 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 Cr2O3 alloy interface.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00846691
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