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Degradation of ferritic stainless steels at 1200 °C in air

Journal Article


Abstract


  • Three commercial ferritic stainless steels were investigated at 1200 °C by a thermogravimetric analyser (TGA) in air. The oxidation kinetics of the ferritic stainless steels differed significantly. The adhesion of the Cr 2 O 3 scale, the morphology of the SiO 2 , with or without (Cr, Mn) 3 O 4 spinel on the top can greatly influence the oxidation and the degradation behaviour of the steels. Although the SUS430 steel had less Cr among the ferritic stainless steels (16.2 wt% Cr), it did not show more degradation behaviour than the B443NT steel (21.0 wt% Cr). The spallation of the protective oxide scale on the B443NT steel was caused by vacancy condensation at the scale/substrate interface where the SiO 2 particles were and the developed compressive stresses within the oxide scale during oxidation. (Cr, Mn) 3 O 4 spinel on the top of the Cr 2 O 3 scale on the B445J1M steel influenced its evaporation rate. The thermodynamic aspect of the chemical composition and oxidation atmosphere of the Fe–Cr–O system was also discussed.

Publication Date


  • 2018

Citation


  • Cheng, X. W., Jiang, Z. Y., Monaghan, B. J., Longbottom, R. J., Wei, D. B., Hee, A. C. & Jiang, L. Z. (2018). Degradation of ferritic stainless steels at 1200 °C in air. Materials and Corrosion, 69 (1), 63-75.

Scopus Eid


  • 2-s2.0-85040102102

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1023

Number Of Pages


  • 12

Start Page


  • 63

End Page


  • 75

Volume


  • 69

Issue


  • 1

Place Of Publication


  • Germany

Abstract


  • Three commercial ferritic stainless steels were investigated at 1200 °C by a thermogravimetric analyser (TGA) in air. The oxidation kinetics of the ferritic stainless steels differed significantly. The adhesion of the Cr 2 O 3 scale, the morphology of the SiO 2 , with or without (Cr, Mn) 3 O 4 spinel on the top can greatly influence the oxidation and the degradation behaviour of the steels. Although the SUS430 steel had less Cr among the ferritic stainless steels (16.2 wt% Cr), it did not show more degradation behaviour than the B443NT steel (21.0 wt% Cr). The spallation of the protective oxide scale on the B443NT steel was caused by vacancy condensation at the scale/substrate interface where the SiO 2 particles were and the developed compressive stresses within the oxide scale during oxidation. (Cr, Mn) 3 O 4 spinel on the top of the Cr 2 O 3 scale on the B445J1M steel influenced its evaporation rate. The thermodynamic aspect of the chemical composition and oxidation atmosphere of the Fe–Cr–O system was also discussed.

Publication Date


  • 2018

Citation


  • Cheng, X. W., Jiang, Z. Y., Monaghan, B. J., Longbottom, R. J., Wei, D. B., Hee, A. C. & Jiang, L. Z. (2018). Degradation of ferritic stainless steels at 1200 °C in air. Materials and Corrosion, 69 (1), 63-75.

Scopus Eid


  • 2-s2.0-85040102102

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1023

Number Of Pages


  • 12

Start Page


  • 63

End Page


  • 75

Volume


  • 69

Issue


  • 1

Place Of Publication


  • Germany