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09161 Proposed Metal Dusting Mechanism in Lower Temperature, High Steam Syn Gas

Picture for 09161 Proposed Metal Dusting Mechanism in Lower Temperature, High Steam Syn Gas
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Product Number: 51300-09161-SG
ISBN: 09161 2009 CP
Author: Minfa Lin, Sheldon Dean, John J. Hoffman and William R. Watkins
Publication Date: 2009
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Aggressive metal dusting attack of nickel-based alloys was encountered in high water vapor containing syn gas environments in the 1000-1110oF (538-566oC) range while iron-based alloys suffered little damage. Metallurgical and energy dispersive x-ray spectroscopy analyses of sectioned specimens found the iron-based alloys formed protective chromium rich oxide films while the nickel-based alloys did not. Nickel based alloys suffered both iron and chromium depletion from the surface layers as well as accelerated attack. A mechanism for these observations is discussed.
Aggressive metal dusting attack of nickel-based alloys was encountered in high water vapor containing syn gas environments in the 1000-1110oF (538-566oC) range while iron-based alloys suffered little damage. Metallurgical and energy dispersive x-ray spectroscopy analyses of sectioned specimens found the iron-based alloys formed protective chromium rich oxide films while the nickel-based alloys did not. Nickel based alloys suffered both iron and chromium depletion from the surface layers as well as accelerated attack. A mechanism for these observations is discussed.
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