%0 Journal Article
%T Alloy degradation under oxidizing-sulfidizing conditions at elevated temperatures
%A Gleeson
%A Brian
%J Materials Research
%D 2004
%I ABM, ABC, ABPol, SBCC, SBCr, SBMM, SBPMat
%R 10.1590/S1516-14392004000100010
%X exposure of high-temperature alloys to a low-po2 oxidizing-sulfidizing environment above about 550 ˇăc is often characterized by an initial period of protective oxidation followed by more rapid corrosion. this paper will provide a brief overview of alloy corrosion in oxidizing-sulfidizing atmospheres, with specific consideration given to the thermodynamic and kinetic aspects of the process, resulting modes of degradation, and alloy selection. the concept of a "critical microstructure" in the subsurface of the alloy as a prerequisite to initiating protective scale breakdown will also be discussed. the paper will conclude with a specific example of alloy development for the filtration of hot oxidizing-sulfidizing gases.
%K sulfidation
%K thermodynamics
%K kinetic boundary
%K breakaway
%K critical microstructure.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-14392004000100010&lng=en&nrm=iso&tlng=en