Corrosion behaviors of thermally grown oxide films on Fe-based bulk metallic glasses

Abstract

Oxide films formed on the surfaces of Fe-based bulk metallic glasses in the temperature range between 373 K and 573 K were characterized and their effects on the corrosion behaviors were investigated by microstructural and electrochemical analysis. The oxide film formed at 573 K is iron-rich oxide and it exhibits an n-type semiconductor at a higher potential than 0.35 V and a p-type semiconductor at a lower potential than 0.35 V. Capacitance measurements show that the donor density decreases with the increase in oxidation temperature, while the thickness of the space charge layer increases with the oxidation temperature rising. The result of immersion tests shows that the mass loss rate increases with the oxidation temperature rising. Therefore, the correlation between microstructure and corrosion resistance needs to be proposed because the corrosion resistance is deteriorated with the development of the oxide films.

Keywords

bulk metallic glass / oxide films / corrosion / capacitance

References

[1] Qiao D.C., Wang G.Y., Liaw P.K., Ponnambalam V., Poon S.J., Shiflet G.J. Fatigue behavior of an Fe₄₈Cr₁₅-Mo₁₄Er₂C₁₅B₆ amorphous steel. J. Mater. Res., 2007, 22, 544

[2] Greer A.L. Metallic glasses. Science, 1995, 267, 1947

[3] Scully J.R., Gebert A., Payer J.H. Corrosion and related mechanical properties of bulk metallic glasses. J. Mater. Res., 2007, 22, 302

[4] M.M.P. Liaw, Bulk Metallic Glasses: an Overview, Springer, 2008, p.10

[5] Tan M.W., Akiyama E., Kawashima A., Asami K., Hashimoto K. The influences of Mo addition and air exposure on the corrosion behavior of amorphous Fe-8Cr-13P-7C alloy in de-aerated 1 M HCl. Corros. Sci., 1996, 38, 349

[6] Li X.Y., Akiyama E., Habazaki H., Kawashima A., Asami K., Hashimoto K. The corrosion behavior of sputter-deposited amorphous Fe-Cr-Ni-Ta alloys in 12 M HCl. Corros. Sci., 1999, 41, 1849

[7] Shen B.L., Akiba M., Inoue A. Effect of Cr addition on the glass-forming ability, magnetic properties, and corrosion resistance in FeMoGaPCBSi bulk glassy alloys. J. Appl. Phys., 2006, 100, 1

[8] Kai W., Ren L.F., Kao P.C., Huang R.T., Liu C.T. The oxidation behavior of an Fe₆₁B₁₅Zr₈Mo₇Co₅Y₂Cr₂ bulk metallic glass at 550–700°C. Intermetallics, 2009, 17, 205

[9] Wang S.L., Li H.X., Zhang X.F., Yi S. Effects of Cr contents in Fe-based bulk metallic glasses on the glass forming ability and the corrosion resistance. Mater. Chem. Phys., 2009, 113, 878

[10] Hakiki N.E., Monemor M.F., Ferreira M.G.S., da Cunha Belo M. Semiconducting properties of thermally grown oxide films on AISI 304 stainless steel. Corros. Sci., 2000, 42, 687

[11] Hamadou L., Kadri A., Benbrahim N. Impedance investigation of thermally formed oxide films on AISI 304 stainless steels. Corros. Sci., 2010, 52, 859

[12] Montemor M.F., Simões A.M.P., Ferreira M.G.S., da Cunha Belo M. The role of Mo in the chemical composition and semiconductive behavior of oxide films formed on stainless steels. Corros. Sci., 1999, 41, 17

[13] Schmuki P., Bohni H. Metastable pitting and semiconductive properties of passive films. J. Electrochem. Soc., 1992, 139, 1908

[14] Tsuchiya H., Fujimoto S., Shibata T. Semiconductive behavior of passive films formed on Fe-Cr alloy. J. Electroceram., 2006, 16, 49

[15] Alhosseini A.F., Golozar M.A., Saatchi A., Raeissi K. Effect of solution concentration on semiconducting properties of passive films formed on austenitic stainless steels. Corros. Sci., 2010, 52, 205

[16] Ningshen S., Mudali U.K., Mittal V.K., Khatak H.S. Semiconducting and passive film properties of nitrogen-containing type 316LN stainless steels. Corros. Sci., 2007, 49, 481

[17] Esih I., Alar V., Juraga I. Influence of thermal oxides on pitting corrosion of stainless steel in chloride solutions. Corros. Eng. Sci. Technol., 2005, 40, 110