When 10:30 AM - 11:30 AM Sep 15, 2017
Where 1571 G.G. Brown
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Deposit-Induced Hot Corrosion and Materials Design Strategies to Reduce its Impact


Brian Gleeson
Department of Mechanical Engineering & Materials Science, University of Pittsburgh

Hot corrosion is an accelerated degradation process that is generally considered to involve deposition of corrosive species (e.g., sulfates) from the surrounding environment to the surface of hot components, followed by destruction of the protective oxide scale. Gas turbine engine components, particularly high-pressure turbine blades and rotors, exposed to harsh environments are apt to encounter two modes of hot corrosion: high temperature hot corrosion (Type I) in the temperature range 850-1000°C and low temperature hot corrosion (Type II) in the range 600-800°C. This presentation will overview recent research conducted at the University of Pittsburgh to advance understanding of sulfate-based deposit-induced hot corrosion. It will be shown that (1) an effective laboratory-scale testing procedure has been developed that better simulates the form and extent of degradation found in service, and (2) that new insights on alloy/coating composition-structure relations for enhanced corrosion resistance have been established.

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