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Technical Issues
1/2016 pp. 82-89

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The mechanism and kinetics of oxidation of Inconel 617 and 625 alloys in air atmosphere were investigated. Materials were examined by the thermogravimetric method. The X-ray diffraction spectrometer (XRD) was used to observation change in chemical composition the oxide scales of Inconel alloys specimens. Oxidation kinetics was determined from weight-change measurements. The surface and microstructure of the sample were observed in an optical microscope (OM) and a scanning electron microscope (SEM). The results showed that the oxide scales of the alloys were compact and continuous. The layer were contained as the outer of Cr2O3, and the internal of NiCr2O4 spinel, NiO and other oxides. Oxides’ scales with good adherence were formed on the surface of alloys. The kinetics and thermodynamic parameters of oxides formation were calculated and discussed for both alloys.

Key words

Inconel alloys, Thermogravimetric analysis, Thermodynamic parameters, Parabolic rate constants, Activation energy


1. Siddique, M., Hussain, N., Shafi, M., Identification of Iron Oxides Qualitatively/Quantitatively Formed during the High Temperature Oxidation of Superalloys in Air and Steam Environments, J. Mater. Sci. Technol., 2009, 25, pp. 479-482.

2. Kawakita, J., Kuroda, S., Fukushima, T., Kodama, T., Corrosion resistance of HVOF sprayed HastelloyC Nikel base Allom In seawater, Corros. Sci., 2003, 45, pp. 2819-2835.

3. Thomas, A., El-Wahabi, M., Cabrera, J.M., Prado, J.M., High temperature deformation of Inconel 718, J. Mater. Process. Technol., 2006, 177, pp. 469-472.

4. Liu, L., Li, Y., Wang, F.H., Influence of micro-structure on corrosion behavior of a Ni-based superalloy in 3.5% NaCl, Electrochim. Acta., 2007, 52, pp. 7193-7202.

5. Yin, Z.F., Ahao, W.Z., Lai, W.Y., Zhao, X.H., Electrochemical behaviour of Ni-base alloys exposed under oil/gas field environments, Corros. Sci., 51, pp. 1702-1706.

6. Tawancy, H.M., Sridhar, N., High-Temperature Oxidation behavior of a Ni-Cr-Al-Fe-Y a Alloy, Oxid. Met. 1992, 37, pp. 143-166.

7. Zuru, A.A., Dangoggo, S.M., Birnin-Yauri, U.A., Tambuwal, A.D., Adoption of thermogravimetric kinetic models for kinetic analysis of biogas production, Renew. Energy, 2004, 29, pp. 97-107.

8. Xiao, H.M., Ma, X.Q., Li, Z.Y., Isoconversional kinetic analysis of co-combustion of sewage sludge with straw and coal, Appl. Energy, 2009, 86, pp. 1741-1745.

9. Bouklah, M., Attayibat, A., Kertit, S., Ramdani, A., Hammouti, B., A pyrazine derivative as corrosion inhibitor for steel in sulphuric acid solution, Appl. Surf. Sci., 2005, 242, pp. 399-406.

10. Bouklah, M., Hammouti, B., Lagrenée, M., Bentiss, F., Thermodynamic properties of 2,5-bis(4-methoxyphenyl)-1,3,4-oxadiazole as a corrosion inhibitor for mild steel in normal sulfuric acid medium, Corros. Sci., 2006, 48, pp. 2831-2842.

11. Scendo, M., 2005. Potassium ethyl xanthate as corrosion inhibitor for copper in acidic chloride solutions, Corros. Sci., 2005, 47, pp. 1738-1749.

12. Scendo, M., Corrosion inhibition of copper by potassium ethyl xanthate in acidic chloride solutions, Corros. Sci., 2005, 47, pp. 2778-2791.

13. Scendo, M., Trela, J., Radek, N., Purine as an Effective Corrosion Inhibitor for Stainless Steel in Chloride Acid Solutions, Corros. Rev., 2012, 30, pp. 33-45.

14. Atkins, P., Julio, P., Physical Chemistry: Thermodynamics and Kinetics (8th ed.). W.H. Freeman, 2006.

15. Pavithra, M.K., Venkatesha, T.V., Punith Kumar, M.K., Tondan, H.C., 2012. Inhibition of mild steel corrosion by Rabeprazole sulfide, Corros. Sci., 2012, 60, pp. 104-111.