Metal dusting corrosion of nickel-based alloys

C. M. Chun, G. Bhargava, T. A. Ramanarayanan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Metal dusting corrosion of nickel-based alloys (i.e. Inconel 600, 601 and 693) has been simulated in high carbon activity environments over a temperature range from 450 to 750°C. Overall, Ni-based alloys corrode by a combination of carbon diffusion and precipitation in the alloy interior and atom migration through surface carbon deposits. The formation of protective surface oxide films provides initial protection against metal dusting, but local rupture of surface Cr-rich oxide films allows rapid carbon diffusion into the alloy. The focus of this research is to advance the understanding of the corrosion mechanisms of Ni-based alloys by characterizing interfacial processes at the nanometer level. In addition to the effect of temperature and environmental chemistry, the mechanistic aspects of metal dusting are discussed with particular attention to the stages of microstructure evolution as degradation proceeds. copyright The Electrochemical Society.

Original languageEnglish (US)
Title of host publicationECS Transactions - High Temperature Corrosion and Materials Chemistry 6
Pages43-57
Number of pages15
Edition14
DOIs
StatePublished - Dec 1 2007
EventHigh Temperature Corrosion and Materials Chemistry 6 - 210th ECS Meeting - Cancun, Mexico
Duration: Oct 29 2006Nov 3 2006

Publication series

NameECS Transactions
Number14
Volume3
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceHigh Temperature Corrosion and Materials Chemistry 6 - 210th ECS Meeting
CountryMexico
CityCancun
Period10/29/0611/3/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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