Abstract
Oxidation and dross formation is an undesirable, but unavoidable part of the production of aluminum. Past efforts to minimise dross formation through improved melt processing practices have been hindered by uncertainty in the fundamental behavior of how oxides grow on molten aluminum. The growth of oxide films formed on pure aluminum melts held at various temperatures and exposed to ambient air is investigated. Growth rates (i.e. mass/area as a function of time) were determined by skimming oxide films from laboratory-scale melt surfaces after various exposure times and then processing these films to separate oxide from metal. Collected oxide films were characterized using transmission electron microscopy (TEM) and electron diffraction techniques. γ-Al2O3 appears to be the dominant oxide species and no breakaway oxidation was observed even at 850°C/14h. The micro structural evolution of the films is discussed in light of the results and behavior implications of this work for industrial cast house situations are discussed.
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References
A. Clark, P. McGlade, “Furnace Dross Prevention, Melt Loss Reduction and Dross Recycling: A Review of Best Practice” (Paper presented at the 3rd International Melt Quality Workshop, Dubai, UAE, 14–16 November 2005), 8.
J.A. Taylor, “Oxidation, Dross and Melt Loss Issues Involved in the Aluminium Cast House” (Paper presented at the 10th Australasian Conference on Aluminium Cast House Technology, Sydney, Australia, 6–9 August 2007), 10.
M. Prakash, G.G. Pereira, P.W. Cleary, P. Rohan, J.A. Taylor, “Validation of SPH Predictions of Oxide Generated During Al Melt Transfer,” Progress in Computational Fluid Dynamics, 10 (5/6) (2010), 319–326.
L.P.H. Jeurgens, W.G. Sloof, F.D. Tichelaar, E.J.Mittemeijer, “Structure and Morphology of Aluminium-Oxide Films Formed by Thermal Oxidation of Aluminium,” Thin Solid Films, 418 (2) (2002), 89–101.
N. Birks, G.H. Meier, F.S. Pettit, Introduction to the High-Temperature Oxidation of Metals (Cambridge, UK; New York: Cambridge University Press, 2006).
S.A. Impey, D.J. Stephenson, J.R. Nicholls, “Mechanism of Scale Growth on Liquid Aluminium,” Materials Science and Technology, 4 (12) (1988) 1126–1132.
W. Thiele, “Die Oxydation von Aluminium- und Aluminiumlegierungs-Schmelzen,” Aluminium, 38 (11,12) (1962) 707–715 780–786.
C.N. Cochran, D.L. Belitskus, D.L. Kinosz, “Oxidation of Aluminum-Magnesium Melts in Air, Oxygen, Flue Gas, and Carbon Dioxide,” Metallurgical Transactions B, 8B (2) (1977), 323–332.
D.J. Field, G.M. Scamans, E.P. Butler, “The High Temperature Oxidation of Al-4.2 wt pct Mg alloy,” Metallurgical Transactions A, 18A (4) (1987) 463–472.
M.P Silva, D.E.J. Talbot, “Oxidation of Liquid Aluminum-Magnesium Alloys” (Paper presented at the 118th TMS Annual Meeting, Las Vegas, Nevada, 27 February to 3 March 1989), 6.
S.D. Impey, D.J. Stephenson, J.R. Nicholls, “The Influence of Surface Preparation and Pretreatments on the Oxidation of Liquid Aluminium and Aluminium-Magnesium Alloys” (Paper presented at the Second International Conference on the Microscopy of Oxidation, Cambridge, UK, 29–31 March 1993) 323–337.
W.W. Smeltzer, “Oxidation of Aluminum in the Temperature Range 400°C-600°C,” Journal of the electrochemical society, 103 (4) (1956), 209–214.
M.J. Dignam, W.R. Fawcett, H. Böhni, “The Kinetics and Mechanism of Oxidation of Superpurity Aluminum in Dry Oxygen I. Apparatus Description and the Growth of “Amorphous” Oxide,” Journal of the Electrochemical Society, 113 (7) (1966), 656–662.
S. Freti, J.D. Bornard, K. Buxmann, “Metallurgy of Dross Formation on Al Melts,” (Paper presented at the 111th AIME Annual Meeting, Dallas, Texas, 14–18 February 1982), 14.
J.A.S. Tenório, Espinosa D.C.R., “Recycling of Aluminum,” Handbook of Aluminum, ed. G.E.Totten, D.S. MacKenzie (Marcel Dekker Inc. 2003), 115–153.
R.R. Roy, Y. Sahai, “Coalescence Behavior of Aluminum Alloy Drops in Molten Salts,” Materials Transaction, JIM, 38 (11) (1997) 995–1003.
A.я Radin, “Окисление жидких металлов” (Paper presented at the 16th Meeting on the Theory of Foundry Processes (Труды XVI Совещания по теории литейных процессов), Moscow, USSR, 1974), 7.
E. Bergsmark, C.J. Simensen, P. Kofstad, “The Oxidation of Molten Aluminium,” Materials Science and Engineering, A 120 (1989), 91–95.
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Bonner, S.J., Taylor, J.A., Yao, JY., Rhamdhani, M.A. (2016). Oxidation of Commercial Purity Aluminum Melts: An Experimental Study. In: Sadler, B.A. (eds) Light Metals 2013. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-65136-1_168
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DOI: https://doi.org/10.1007/978-3-319-65136-1_168
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