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Effect of Die Bearing Parameters on Corrosion Response of Extruded Al-Zn-Mg Alloy
International Journal of Materials Science and Applications
Volume 4, Issue 3, May 2015, Pages: 209-212
Received: May 5, 2015; Accepted: May 11, 2015; Published: May 27, 2015
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Authors
Injor Oryina Mbaadega, Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Nigeria
Adewuyi Benjamin Omotayo, Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Nigeria
Gundu David Terfa, Department of Mechanical Engineering, University of Agriculture, Makurdi, Nigeria
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Abstract
In this paper, the effect of die bearing parameters (die bearing length and die reduction ratio) on corrosion response of extruded Al-Zn-Mg alloy was investigated. The alloy was target material for production of automobile bumper beams. Medium carbon steel dies with entry angles of 750, 900, 1050, 1200, 1500 and reduction ratios of 0.21, 0.40, 0.48 and 0.62 were used to extrude the alloy at temperature of 5000C. The extruded samples were subjected to electrochemical corrosion using Tafel polarization technique. The potential dynamic polarization curves indicated improvement in the corrosion resistance of the extruded alloy, and the corrosion rate under extruded condition increased with increase in both die angle and reduction ratio. It was concluded that the Al-Zn-Mg alloy is suitable for the target application.
Keywords
Extrusion, Al-Zn-Mg Alloy, Die Entrant Angle, Die Reduction Ratio, Potential Dynamic Polarization, Corrosion Rate
To cite this article
Injor Oryina Mbaadega, Adewuyi Benjamin Omotayo, Gundu David Terfa, Effect of Die Bearing Parameters on Corrosion Response of Extruded Al-Zn-Mg Alloy, International Journal of Materials Science and Applications. Vol. 4, No. 3, 2015, pp. 209-212. doi: 10.11648/j.ijmsa.20150403.19
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