Copper redeposition and surface enrichment during the dissolution of Al‐Cu alloys in different concentrations of NaCl solution. Part 1 – electrochemical measurements
Abstract
Purpose
The paper aims to study the dissolution of Al, Al‐3.84%Cu, Al‐5.22%Cu and Al‐11%Cu alloys in different concentrations of NaCl (10‐5‐10‐1 M).
Design/methodology/approach
The approach is to use open circuit potential (OCP) and potentiostatic polarization measurements.
Findings
Results obtained showed that, as the Cu content was increased in the Al‐Cu alloys, a steady state potential was rapidly reached. Addition of different concentrations of CuCl2 to 0.5 M NaCl demonstrated that by increasing the concentration of CuCl2 up to 2 ppm a greater increase in the OCP towards more anodic value occurred from the moment of immersion. Further increases in the concentration of CuCl2, up to 600 ppm, exhibited the same behavior.
Originality/value
The results of the study reveal that cathodic current was controlled by the oxygen in solution, while the anodic current increased with increased Cu content in the alloy.
Keywords
Citation
El Warraky, A.A., El‐Aziz, A.M. and Soliman, K.A. (2007), "Copper redeposition and surface enrichment during the dissolution of Al‐Cu alloys in different concentrations of NaCl solution. Part 1 – electrochemical measurements", Anti-Corrosion Methods and Materials, Vol. 54 No. 3, pp. 155-162. https://doi.org/10.1108/00035590710748623
Publisher
:Emerald Group Publishing Limited
Copyright © 2007, Emerald Group Publishing Limited