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Aqueous solution corrosion behaviour of “poor man” high manganese‐aluminum steels
Author(s) -
Cavallini M.,
Felli F.,
Fratesi R.,
Veniaii F.
Publication year - 1982
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.19820330506
Subject(s) - corrosion , manganese , austenite , metallurgy , aqueous solution , materials science , ferrous , hydroxide , aluminium , ferrous sulphate , sodium hydroxide , inorganic chemistry , chemistry , microstructure
The corrosion behaviour of high manganese (19.8 – 32.5%)aluminum (7.1 – 10.2%) austenitic steels in different aqueous solutions has been examined. Potentiodynamic tests in 1 N sulphuric acid solution show high current densities either in the active or in the passive region and the formation of a thick film which separates in active/passive transition zone. Potentiodynamic tests in neutral buffer solution show a behaviour similar to that of the other ferrous alloys. Potentiodynamic tests in 1 N sodium hydroxide basic solution show a corrosion current density in the passive region related to the different manganese oxides higher than that of pure iron. The corrosion resistance of these steels is always worse than that of conventional grades austenitic stainless steels.