Metal dusting of nickel-based alloys

The carburization behavior of nine commercial nickel-based alloys and four iron-nickel-chromium alloys was investigated at 650 deg C in a carburizing carbon monoxide (CO)-H sub 2 hydrogen oxide (H sub 2O) gas with a carbon activity (a sub c) of a sub c > > 1. The Fe-Ni-Cr alloys suffered sever...

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Bibliographic Details
Published inMaterials performance Vol. 37; no. 7; pp. 58 - 63
Main Authors GRABKE, H. J, MÜLLER-LORENZ, E. M, KLÖWER, J, AGARWAL, D. C
Format Magazine Article
LanguageEnglish
Published Houston, TX National Association of Corrosion Engineers 01.07.1998
NACE International
Subjects
Applied sciences
Corrosion
Corrosion environments
Exact sciences and technology
Metals. Metallurgy
Nickel base alloys
Oxide layer
Hydrogen
Dusting
Corrosion rate
Chromium oxide
Protective layer
Concentration effect
Steam
Gas corrosion
Carbon monoxide
Chromium addition
Carburization
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Summary:The carburization behavior of nine commercial nickel-based alloys and four iron-nickel-chromium alloys was investigated at 650 deg C in a carburizing carbon monoxide (CO)-H sub 2 hydrogen oxide (H sub 2O) gas with a carbon activity (a sub c) of a sub c > > 1. The Fe-Ni-Cr alloys suffered severe metal dusting after a very short test period. Nickel-based alloys were generally less susceptible to metal dusting than Fe-based alloys. Nickel-based alloys with Cr concentrations of 25% and above, on the other hand, showed no significant evidence of metal dusting even after 10 # 000 # h of exposure. It was found that these alloys were protected against metal dusting by the formation of a dense, self-healing chromia scale, which prevented the penetration of carbon into the base metal. Material includes N06601 nickel base alloy.
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ISSN:0094-1492