Electrochemical Investigation of Corrosion Behavior Heat Treated Al-6Si-0.5Mg-xCu x = 0, 0.5, 1, 2, and 4 wt% AlloysReport as inadecuate




Electrochemical Investigation of Corrosion Behavior Heat Treated Al-6Si-0.5Mg-xCu x = 0, 0.5, 1, 2, and 4 wt% Alloys - Download this document for free, or read online. Document in PDF available to download.

International Journal of Corrosion - Volume 2014 2014, Article ID 356752, 6 pages -

Research ArticleDepartment of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh

Received 19 June 2014; Revised 16 November 2014; Accepted 17 November 2014; Published 7 December 2014

Academic Editor: Ramazan Solmaz

Copyright © 2014 A. Hossain et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The corrosion behaviour of heat treated Al-6Si-0.5Mg-xCu , 1, 2, and 4 wt% alloys in 0.1 M NaCl solution was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy EIS techniques. The potentiodynamic polarization curves reveal that 2 wt% Cu Alloy-4 and 4 wt% Cu Alloy-5 content alloys are more prone to corrosion than the other alloys investigated. But the EIS test results showed that charge transfer resistance increases with increasing Cu content into Al-6Si-0.5Mg. Maximum charge transfer resistance is reported with the addition of 2 wt% Cu and minimum value is for 4 wt% Cu content Al-6Si-0.5Mg alloy. Due to additions of Cu into Al-6Si-0.5Mg alloy, the magnitudes of open circuit potential OCP, corrosion potential , and pitting corrosion potential in NaCl solution were shifted to the more noble direction.





Author: A. Hossain, F. Gulshan, and A. S. W. Kurny

Source: https://www.hindawi.com/



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