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- Title
Isothermal Oxidation Of Fe-Mn-Al-C-Cr-Si-Mo And Fe-9Cr-Mo Alloys.
- Authors
Betancur-Ríos, J. D.; Wang, C. J.; Pérez Alcazar, G. A.; Tabares, J. A.
- Abstract
The aim of this paper is to investigate the oxidation behavior of Fe-Mn-Al-C-Cr-Mo-Si (Mo(1)) and Fe-Mn-Al-C-Cr-Mo-Si (Mo(0)) alloys and compare it against Fe-9Cr-Mo (FCR)commercial alloy. The experiments were carried out at 600, 700, 750 and 850 °C, during 72 hours in static air. The oxidation kinetics was measured using a Thermogravimetry Analyzer. In order to characterize the oxide scale, X-ray diffraction (XRD) and Energy Disperse Spectrometry it were used. TGA results show that at all temperatures the sample FCR exhibits the lowest kinetic corrosion and the lowest weight gain, whereas Mo(0) the highest, showing an important effect of Mo addition in Mo(1) alloy. The oxidation products found by XRD and EDS were (Mn, Fe)2O3 in Mo(0) and Mo(1) and Fe2O3 in FCR samples corresponding to the external layer. In the internal part Mn(Fe, Al)2O4 and Fe2O3 species were found for Mo(0,1) and FCR alloys, respectively. The roll of the Mo addition on the oxidation mechanism is discussed.
- Subjects
OXIDATION; IRON compounds; IRON alloys; METALLIC composites; MICROALLOYING; GRAVIMETRIC analysis; THERMOGRAVIMETRY
- Publication
Revista Colombiana de Física, 2008, Vol 40, Issue 1, p84
- ISSN
0120-2650
- Publication type
Article