Izvorni znanstveni članak
https://doi.org/10.5599/jese.2015.0070
Electrochemical investigation of the corrosion behavior of heat treated Al-6Si-0.5Mg-xCu (x=0, 0.5 and 1) alloys
Abul Hossain
; Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
Mohammed Abdul Gafur
; Pilot Plant and Process Development Centre (PP & PDC), BCSIR Laboratories, Dhaka, Bangladesh
Fahmida Gulshan
; Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
Abu Syed Wais Kurny
; Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
Sažetak
The corrosion behavior of heat treated Al-6Si-0.5Mg-xCu (x=0, 0.5 and 1 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 0.5 wt % Cu and 1 wt % Cu content alloys are less prone to corrosion than the Cu free alloy. The EIS test results also showed that corrosion resistance or charge transfer resistance (Rct) increases with increasing Cu content into Al-6Si-0.5Mg alloy. Maximum charge transfer resistance (Rct) was obtained with the addition of 1 wt % Cu and minimum Rct value was for Cu free 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.
Ključne riječi
Al alloy; Nyquist plot; Corrosion rate; Tafel plot; EIS
Hrčak ID:
136650
URI
Datum izdavanja:
15.3.2015.
Posjeta: 1.473 *