Applicability of EIS for evaluation of corrosion resistance of aluminum flakes
Abstract
Purpose
The conventional method for evaluation of corrosion resistance of aluminum flakes is based on the volume of evolved hydrogen in acidic and basic environments. This study aims to introduce electrochemical impedance spectroscopy (EIS) as a method to evaluate corrosion resistance of aluminum flakes.
Design/methodology/approach
Aluminum flakes with different surface modifications were compressed to build a disk. Then, the disks were examined by EIS in NaCl solution. Also, the corrosion resistance of the flakes was evaluated by the conventional method.
Findings
The results revealed applicability of EIS for evaluation of corrosion resistance of aluminum flakes.
Originality/value
Application of EIS to evaluate corrosion resistance of aluminum flakes is novel. As it can provide fast, reliable and quantitative estimation of the corrosion resistance of the aluminum flakes in the 3.5 per cent NaCl solution. This medium is highly encountered for the aluminum flakes used in organic coatings, that is why test in NaCl solution is more convenient compared to the conventional methods using acid and alkaline conditions.
Keywords
Acknowledgements
The authors are grateful for support from the INSF.
Citation
Amirshaqaqi, N., Salami-Kalajahi, M. and Mahdavian, M. (2016), "Applicability of EIS for evaluation of corrosion resistance of aluminum flakes", Anti-Corrosion Methods and Materials, Vol. 63 No. 5, pp. 355-359. https://doi.org/10.1108/ACMM-02-2015-1503
Publisher
:Emerald Group Publishing Limited
Copyright © 2016, Emerald Group Publishing Limited