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Crystallographic effects in corrosion of austenitic stainless steel 316L
Author(s) -
Lindell D.,
Pettersson R.
Publication year - 2015
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.201408002
Subject(s) - corrosion , nucleation , materials science , electron backscatter diffraction , anisotropy , metallurgy , pitting corrosion , diffraction , austenite , crystallography , chemistry , microstructure , optics , physics , organic chemistry
Electron backscatter diffraction and confocal laser microscopy have been used to quantify the degree of crystallographic anisotropy during corrosion of AISI 316L in two test solutions. Corrosion in 30 vol% H 2 SO 4 sulphuric acid shows pronounced crystallographic anisotropy in which the corrosion rate increases in the order {111} < {110} ≲ {100}. The ratio between the slowest corroding {111} and the fasting corroding {100} surfaces is about 3. Pitting corrosion in a solution of FeCl 3 and AlCl 3 in ethanol/glycerol agrees with other reported observations that high‐atomic density surfaces {111} and {100} are less prone to pit nucleation, however the effect was relative small.