Corrosion behavior of a five-layer Al alloy composite plate in NaCl solution
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 26 January 2023
Issue publication date: 9 February 2023
Abstract
Purpose
This paper aims to investigate the electrochemical corrosion behavior of a five-layer Al alloy composites (4343/4047/3003/4047/4343) with a thickness of 0.2 mm in NaCl solution.
Design/methodology/approach
Electrochemical impedance spectroscopy, polarization curve and morphology analyses were used to study the corrosion behavior of the Al alloy composites from cross-sectional and plane directions.
Findings
The corrosion resistance of the surface from the plane direction was higher than that from the cross sections. Si-enrich particles were observed in the outer 4047/4343 layer, and AlFeCuMnBi phases were identified in the core 3003 layer. The galvanic coupling between the Si-enrich particle and the Al matrix accelerated the dissolution Al matrix.
Originality/value
This work lays the experimental foundation for corrosion mechanism of the Al alloy composite plate.
Keywords
Acknowledgements
This research was financed by the National key research and development program (2022YFB3705801).
Citation
Zhou, D., Wang, M., Ji, Y., Liu, Z., Gao, Z., Hu, W. and Guo, Y. (2023), "Corrosion behavior of a five-layer Al alloy composite plate in NaCl solution", Anti-Corrosion Methods and Materials, Vol. 70 No. 2, pp. 86-91. https://doi.org/10.1108/ACMM-12-2022-2738
Publisher
:Emerald Publishing Limited
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