Original scientific paper

Influence of thermal treatment on structure and corrosion properties of high manganese triplex steels

S. Lasek ; VŠB-Technical University of Ostrava, FMMI Czech Republic
E. Mazancová ; VŠB-Technical University of Ostrava, FMMI Czech Republic

Abstract

In this paper corrosion properties of X70MnAl28-9 TRIPLEX steel were tested after hot rolling and subsequent aging at 500 °C for 6, 30 and 60 min. and at 600 °C for the same times. For comparison related steels(X100MnAl28-12, X70Mn22, C20) were also used. The microstructure wascharacterized by light microscopy, SEM, energy disperse Xray microanalysis. The corrosion behaviour of steels wasexamined by light and scanning electron microscopy, electrochemical techniques (potenciodynamic polarization method, linear polarization, using NaCl and H₂SO₄ water solutions), salt spray test and gravimetric method. Aging has relatively small influence on corrosion resistance of X70MnAl28-9 steel. The localized corrosion in relation to structure and phases is discussed and compared in terms of dissolution, pitting and changes inchemical composition.

Keywords

triplex steels; structure; corrosion; polarization tests

Hrčak ID:

100808

URI

https://hrcak.srce.hr/100808

Publication date:

1.10.2013.

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