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Article Dans Une Revue Corrosion Engineering, Science and Technology Année : 2015

Breakaway oxidation of austenitic stainless steels induced by alloyed sulphur

Résumé

This work focuses on the effect of alloyed sulphur as MnS inclusions in austenitic stainless steels. AISI 304L and AISI 303 were oxidized at 1000 degrees C in synthetic air. The high sulphur grade, AISI 303, presents a breakaway oxidation with formation of nodules with an inner part composed of alternated layers of Fe-rich and Cr-rich oxides. During oxidation, MnS inclusions near the metal/oxide interface are partially dissociated. Manganese is incorporated in the oxide. The sulphur is trapped in Cr,Mn-oxysulphide aggregates which formation leads to a local decrease of the Cr concentration and consequently to the formation of non-protective Fe-rich oxide.

Domaines

Matériaux

Dates et versions

hal-01211314 , version 1 (04-10-2015)

Identifiants

Citer

C. Pascal, V. Parry, E. Fedorova, M. Braccini, P. Chemelle, et al.. Breakaway oxidation of austenitic stainless steels induced by alloyed sulphur. Corrosion Engineering, Science and Technology, 2015, 93, pp.100-108. ⟨10.1016/j.corsci.2015.01.007⟩. ⟨hal-01211314⟩
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