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Diffusion of transition metals in “in situ” duplex oxide grown on a 316 stainless steel
Author(s) -
Smith A. F.,
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.19780290702
Subject(s) - spinel , materials science , duplex (building) , diffusion , chromium , manganese , tracer , metallurgy , oxide , penetration (warfare) , analytical chemistry (journal) , chemistry , thermodynamics , dna , biochemistry , physics , chromatography , operations research , nuclear physics , engineering
Concentration profiles of chromium, maganese and iron radioactive tracers through a duplex oxide grown on 316 stainless steel have been obtained after a diffusion anneal at 1273 K using the serial sectioning technique. The iron tracer diffused normally in both inner and outer oxides of the duplex scale. The concentration of the chromium and manganese tracers increased with increasing penetration into the outer Fe 3 O 4 layer but showed a normal profile in the inner spinel. The diffusion coefficients obtained from the profiles were in the range 6 × 10 −12 – 3 × 10 −11 cm 2 sec −1 for diffusion in the spinel phases.