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07417 Performance of Several Nickel-Base Alloys in Metal Dusting Atmospheres

Picture for 07417 Performance of Several Nickel-Base Alloys in Metal Dusting Atmospheres
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Product Number: 51300-07417-SG
ISBN: 07417 2007 CP
Author: Michael Schutze, Daniel Rohmert, and Till Weber
Publication Date: 2007
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A significant number of plants within the petro-chemical industry are severely affected by the Metal Dusting phenomenon. In the present work longterm corrosion experiments with several Ni-Cr and Ni-Cr-Al alloys were performed in an artificial metal dusting atmosphere of H2-24.5CO-2H2O (vol.-%) with a carbon activity of ac > 1.4 at a temperature of 620°C (1148°F) for up to 10,000 hrs. In addition the influence of small HCl additions (5 vpm) was investigated. The samples were examined every 500 hrs with respect to the carbon deposition behavior and the onset of metal dusting. A comparison between the behavior of chromia and alumina formers is performed and the influence of chlorine is discussed.
A significant number of plants within the petro-chemical industry are severely affected by the Metal Dusting phenomenon. In the present work longterm corrosion experiments with several Ni-Cr and Ni-Cr-Al alloys were performed in an artificial metal dusting atmosphere of H2-24.5CO-2H2O (vol.-%) with a carbon activity of ac > 1.4 at a temperature of 620°C (1148°F) for up to 10,000 hrs. In addition the influence of small HCl additions (5 vpm) was investigated. The samples were examined every 500 hrs with respect to the carbon deposition behavior and the onset of metal dusting. A comparison between the behavior of chromia and alumina formers is performed and the influence of chlorine is discussed.
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