High temperature corrosion in halogenation, oxy-halogenation, and oxidizing environments. [Inconel alloys 600,601, X750, and 625, and Ni-5Cr to Ni-40Cr]

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5180377

Elliott, P ^[1]

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1. UMIST, Manchester (England)

This paper introduces the subject of high-temperature corrosion by halogen species as derived from a variety of gaseous or liquid environments. Halogenation and oxy-halogenation behavior, involving volatile and condensing species, is contrasted with better defined high-temperature oxidation processes, paying particular attention to the chemical and physiochemical factors involved therein. Current mechanisms and limitations regarding our knowledge of halogen corrosion, leading at times to excessive spaccation, linear or accelerating kinetics, cracking, internal attack of alloy matrices, etc. are reviewed and the difficulties associated with the quest for resistant alloys are outlined, more recent efforts in defining surface morphologies from longer-term tests have created more confidence over earlier less reliable studies in this respect. Results of studies at 900-1000 C on a series of commercial alloys exposed to chlorine-containing gases are presented to demonstrate an approach to alloy design and development. Limitations due to spaccation, vaporization and internal attack are demonstrated with reference to those constituents involved therein. Performance in other environments, including HF, is described, as is work conducted on metals or simpler experimental alloys.

• OSTI ID: 5180377
• Report Number(s): CONF-840909--
• Conference Information: Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Journal Volume: 56
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORINE
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
CRACKS
DESIGN
ELEMENTS
HALOGENATION
HALOGENS
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
METALS
NONMETALS
OXIDATION
REACTION KINETICS