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51315-5614-New Trends in Alloy Resistance to Metal Dusting in High Steam Low Temperature Syngas

Picture for New Trends in Alloy Resistance to Metal Dusting in High Steam Low Temperature Syngas
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Product Number: 51315-5614-SG
ISBN: 5614 2015 CP
Author: Stephanie Britton
Publication Date: 2015
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Metal dusting has been studied for over fifty years. In order to more clearly understand the mechanism and to obtain results more quickly the process conditions that were studied in the laboratory were simplified from the industrial conditions that caused the metal dusting failures to occur. Although these laboratory tests were successful in outlining the basic mechanism for metal dusting predictions about alloy resistance based on these academic studies have not proven to be accurate for all plant conditions. Multiple papers published at NACE and elsewhere have pointed to the important role that steam can play in changing alloy response to metal dusting environments. The work described in this paper follows up on a 2009 NACE publication by Hoffman et al which described plant results indicating that stainless steels are more resistant to metal dusting than nickel-based alloys under high steam low temperature syngas conditions. This paper describes laboratory scale work that reproduced these plant results under controlled conditions in a reactor set up to mimic the process conditions found in the plant. These carefully controlled studies confirm that under the right conditions such as high steam and low temperature syngas stainless steels can have superior metal dusting resistance as compared with nickel-based alloys. Results are discussed for Incoloy 800H 310SS and Inconel 601 at 1050°F and in flowing syngas containing greater than 23% steam.
Metal dusting has been studied for over fifty years. In order to more clearly understand the mechanism and to obtain results more quickly the process conditions that were studied in the laboratory were simplified from the industrial conditions that caused the metal dusting failures to occur. Although these laboratory tests were successful in outlining the basic mechanism for metal dusting predictions about alloy resistance based on these academic studies have not proven to be accurate for all plant conditions. Multiple papers published at NACE and elsewhere have pointed to the important role that steam can play in changing alloy response to metal dusting environments. The work described in this paper follows up on a 2009 NACE publication by Hoffman et al which described plant results indicating that stainless steels are more resistant to metal dusting than nickel-based alloys under high steam low temperature syngas conditions. This paper describes laboratory scale work that reproduced these plant results under controlled conditions in a reactor set up to mimic the process conditions found in the plant. These carefully controlled studies confirm that under the right conditions such as high steam and low temperature syngas stainless steels can have superior metal dusting resistance as compared with nickel-based alloys. Results are discussed for Incoloy 800H 310SS and Inconel 601 at 1050°F and in flowing syngas containing greater than 23% steam.
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01383 APPARENT INFLUENCE OF STEAM ON METAL DUSTING

Product Number: 51300-01383-SG
ISBN: 01383 2001 CP
Author: Hendrik J. de Bruyn, Emil H. Edwin and Stein Brendryen
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01384 ESTIMATING METAL DUSTING ATTACK ON STAINLESS STEEL ALLOYS IN SYNGAS ENVIRONMENTS

Product Number: 51300-01384-SG
ISBN: 01384 2001 CP
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Picture for Investigation on Metal Dusting Corrosion Phenomena Over Incoloy 800
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Investigation on Metal Dusting Corrosion Phenomena Over Incoloy 800

Product Number: 51317--9439-SG
ISBN: 9439 2017 CP
Author: Xiaoyang Guo
Publication Date: 2017
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UNS N08800 alloy coupons were prepared, polished and oxidized in diluted steam at 540 ºC. Formation of carbon on the surface of the pre-oxidized samples was investigated by exposure to reducing, highly carburizing atmosphere (CO in Ar) at 20 bar and varying temperature (550- 750 ºC).
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