Effect of Cu content on the Electrochemical Corrosion Behavior of Peak-aged Al-6Si-0.5Mg Alloys in Sodium Chloride Solution

  • Abul Hossain Kailashtilla MSTE Plant, Sylhet Gas Fields Ltd., (A company of Petrobangla, Energy and Mineral Resources Division) Golapgonj, Sylhet
  • M. A. Gafur Pilot Plant & Process Development Centre, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205
  • Fahmida Gulshan Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering & Technology, Dhaka 1000
  • A. S. W. Kurny Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering & Technology, Dhaka 1000
Keywords: Al-6Si-0.5Mg Alloy, Cu addition, Electrochemical Corrosion.

Abstract

The purpose of this study is to understand the electrochemical corrosion behavior of 1wt% Cu content Al-6Si-0.5Mg alloy in 0.1M NaCl solution. The potentiodynamic polarization curves reveal that 1wt% Cu content alloy is less prone to corrosion than the Cu free alloy. The EIS test results show that corrosion resistance or polarization resistance (Rct) increases with the addition of 1wt% Cu to Al-6Si-0.5Mg alloy. Higher polarization resistance (Rp) has been obtained with the addition of 1wt% Cu to the Al-6Si-0.5Mg alloy. Due to addition of Cu and thermal modification, the magnitude of open circuit potential (OCP), corrosion potential (Ecorr) and pitting corrosion potential (Epit) of Al-6Si-0.5Mg alloy in NaCl solution were shifted to the more noble direction.

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Abstract
2095
PDF
1248
Published
2016-11-19
How to Cite
Hossain, A., Gafur, M. A., Gulshan, F., & Kurny, A. S. W. (2016). Effect of Cu content on the Electrochemical Corrosion Behavior of Peak-aged Al-6Si-0.5Mg Alloys in Sodium Chloride Solution. Rajshahi University Journal of Science and Engineering, 44, 29-35. https://doi.org/10.3329/rujse.v44i0.30384