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The oxidation of type 316 stainless steel in low pressure oxygen at temperatures between 873 and 1223 K
Author(s) -
Hill A. C.,
Hales R.
Publication year - 1978
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19780290303
Subject(s) - alloy , oxygen pressure , kinetics , oxide , diffusion , chromium , materials science , oxygen , metallurgy , grain boundary , manganese , lattice diffusion coefficient , analytical chemistry (journal) , chemistry , thermodynamics , effective diffusion coefficient , microstructure , chromatography , medicine , physics , organic chemistry , radiology , quantum mechanics , magnetic resonance imaging
The oxidation of type 316 stainless steel in low pressure oxygen (1.8 × 10 −2 to 1.3 × 10 −5 N/m 2 ) in the temperature range 873 to 1223K has been studied. The kinetics are determined from weight gain measurements and the surface oxide composition determined by a number of experimental techniques. In the as‐received condition a thin Cr 2 O 3 layer forms with some incorporation of manganese, at rates governed by lattice diffusion in the alloy. After a vacuum anneal for 24 hours at 1273K two types of behaviour are found. In the first a chromium rich M 2 O 3 layer forms, with in certain cases initial formation of Fe 2 O 3 , the kinetics of which indicate that grain boundary diffusion in the alloy is rate determining. In the second a more rapid growth of an Fe 2 O 4 oxide is found, subsequently followed by slower kinetics as a Cr 2 O 3 layer again forms. No discernable relationship between oxidation rates and either pressure or temperature is found.