Corrosion behaviour of twin-roll cast 8006 aluminium alloy foil with different thicknesses for the food packaging industry
Journal of Engineering, Design and Technology
ISSN: 1726-0531
Article publication date: 22 March 2021
Issue publication date: 15 November 2021
Abstract
Purpose
The purpose of this paper is to investigate and find out the surface and electrochemical behaviours of twin roll cast (TRC) 8006 aluminium alloy with different thicknesses due to the cold rolling rates after the TRC process.
Design/methodology/approach
The 8006 aluminium alloys are mostly used for the food packaging industry, as they are corrosion resistant, lightweight and shapable materials. The present work investigates the surface and corrosion behaviours of 8006 aluminium alloys at different thicknesses. TRC aluminium alloys were cold-rolled at two different reduction rates before investigation. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDX) tests were used to examine the phase and elemental analyses. FE-SEM and 3D profilometry also used to observe surface morphology. Open circuit potential (OCP), potentiodynamic polarization and electrochemical impedance spectroscopy tests (EIS) were carried out to find out corrosion behaviours. The results show that the more cold rolling reduction (CRR), the more corrosion rate and surface affection of the TRC 8006 aluminium alloys.
Findings
According to the electrochemical tests (OCP, potentiodynamic polarization test and EIS) and surface morphology results (such as SEM, 3D profilometry and XRD) the more the rolling rate the less the corrosion resistance.
Originality/value
First corrosion behaviour investigation of twin-rolled 8006 Al alloys using electrochemical techniques. First investigation of CRR effects on electrochemical corrosion behaviour of 8006 Al alloys with 3.5 wt.% NaCl solution using EIS. First investigation of 8006 Al alloys as a food packaging material with electrochemical ways.
Keywords
Acknowledgements
This study was supported financially from the Bursa Technical University Scientific Research Project (Project Number: 172L05). The specimens were obtained from Assan Alüminyum company. The authors gratefully appreciate them.
Citation
Eken, T.Y., Sarioglu, C. and Kucuk, I. (2021), "Corrosion behaviour of twin-roll cast 8006 aluminium alloy foil with different thicknesses for the food packaging industry", Journal of Engineering, Design and Technology, Vol. 19 No. 6, pp. 1421-1432. https://doi.org/10.1108/JEDT-10-2020-0402
Publisher
:Emerald Publishing Limited
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