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Corrosion behavior of a five-layer Al alloy composite plate in NaCl solution

Dejing Zhou (Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin, China and Yin Bang Clad Mat Co Ltd, Jiangsu Key Lab Clad Mat, Wuxi, China)
Mingyang Wang (School of Materials Science and Engineering, Tianjin University, Tianjin, China)
Yuanyuan Ji (School of Materials Science and Engineering, Tianjin University, Tianjin, China)
Zhe Liu (School of Materials Science and Engineering, Tianjin University, Tianjin, China)
Zhiming Gao (School of Materials Science and Engineering, Tianjin University, Tianjin, China)
Wenbin Hu (School of Materials Science and Engineering, Tianjin University, Tianjin, China)
Yuhua Guo (Department of Packaging Engineering, Tianjin University of Commerce, Tianjin, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 26 January 2023

Issue publication date: 9 February 2023

154

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

Copyright © 2023, Emerald Publishing Limited

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