caa a22 4500 445843888 CHVBK 20180317145352.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s11085-010-9229-z doi (NATIONALLICENCE)springer-10.1007/s11085-010-9229-z Oxidation of Binary FeCr Alloys (Fe-2.25Cr, Fe-10Cr, Fe-18Cr and Fe-25Cr) in O2 and in O2+H2O Environment at 600°C [Elektronische Daten] [B. Pujilaksono, T. Jonsson, H. Heidari, M. Halvarsson, J.-E. Svensson, L.-G. Johansson] The oxidation behaviour of the binary alloys Fe-2.25Cr, Fe-10Cr, Fe-18Cr and Fe-25Cr (wt%) in dry and wet O2 at 600°C is investigated by isothermal exposures of carefully polished samples for up to 168h. The oxidized samples are investigated gravimetrically and the oxides formed are studied by X-ray diffraction. X-ray photoelectron spectroscopy is used for depth profiling of the thin oxides. The scale surface is imaged by SEM. Cross-sections through the scale are analyzed by SEM/EDX for imaging and for measuring the chemical composition. The oxidation behavior of the four FeCr alloys is intermediate between those of iron and chromium. Fe-2.25Cr oxidizes in a way similar to iron in both environments, forming a poorly protective scale consisting of FeCr spinel at the bottom, magnetite in the middle and a hematite cap layer. In dry O2, Fe-10Cr, Fe-18Cr and Fe-25Cr form a thin and protective (Fe,Cr)2O3 oxide similar to the chromia film formed on pure chromium. In wet O2, Fe-10Cr, Fe-18Cr and Fe-25Cr initially form the same kind of protective oxide film as in dry conditions. After an incubation time that depends on alloy chromium content, all three alloys go into breakaway oxidation and form thick, poorly protective scales similar to those formed on Fe-2.25Cr. Breakaway oxidation in wet O2 is triggered by the evaporation of CrO2(OH)2 from the protective (Fe,Cr)2O3 oxide. Springer Science+Business Media, LLC, 2011 Water vapour effect nationallicence Chromia vaporization nationallicence Protective oxide nationallicence Breakaway oxidation nationallicence High temperature nationallicence Pujilaksono B. Environmental Inorganic Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, 412 96, Göteborg, Sweden aut Jonsson T. Microscopy and Microanalysis Group, Department of Applied Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden aut Heidari H. Microscopy and Microanalysis Group, Department of Applied Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden aut Halvarsson M. Microscopy and Microanalysis Group, Department of Applied Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden aut Svensson J.-E Environmental Inorganic Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, 412 96, Göteborg, Sweden aut Johansson L.-G Environmental Inorganic Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, 412 96, Göteborg, Sweden aut Oxidation of Metals Springer US; http://www.springer-ny.com 75/3-4(2011-04-01), 183-207 0030-770X 75:3-4<183 2011 75 11085 https://doi.org/10.1007/s11085-010-9229-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11085-010-9229-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pujilaksono B. Environmental Inorganic Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, 412 96, Göteborg, Sweden aut NATIONALLICENCE 700 1- Jonsson T. Microscopy and Microanalysis Group, Department of Applied Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden aut NATIONALLICENCE 700 1- Heidari H. Microscopy and Microanalysis Group, Department of Applied Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden aut NATIONALLICENCE 700 1- Halvarsson M. Microscopy and Microanalysis Group, Department of Applied Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden aut NATIONALLICENCE 700 1- Svensson J.-E Environmental Inorganic Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, 412 96, Göteborg, Sweden aut NATIONALLICENCE 700 1- Johansson L.-G Environmental Inorganic Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, 412 96, Göteborg, Sweden aut NATIONALLICENCE 773 0- Oxidation of Metals Springer US; http://www.springer-ny.com 75/3-4(2011-04-01), 183-207 0030-770X 75:3-4<183 2011 75 11085 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer