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Influence of high-temperature aluminizing treatment on the corrosion resistance of 90/10 copper-nickel alloy

Yuhang Gao (School of Materials Science and Engineering, USST, Shanghai, China)
Xiaohong Chen (School of Materials Science and Engineering, USST, Shanghai, China)
Ping Liu (University of Shanghai for Science and Technology, USST, Shanghai, China)
Honglei Zhou (School of Materials Science and Engineering, USST, Shanghai, China)
Shaoli Fu (School of Materials Science and Engineering, USST, Shanghai, China)
Wei Li (School of Materials Science and Engineering, USST, Shanghai, China)
Xinkuan Liu (School of Materials Science and Engineering, USST, Shanghai, China)
Fengcang Ma (School of Materials Science and Engineering, USST, Shanghai, China)
Yanbo Zhu (School of Materials Science and Engineering, USST, Shanghai, China)
Jiayan Wu (School of Materials Science and Engineering, USST, Shanghai, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 20 August 2021

Issue publication date: 17 September 2021

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Abstract

Purpose

This study aims to investigate the effect of coatings prepared by the addition of copper-aluminum alloy powder on the corrosion behavior of 90/10 copper-nickel alloy.

Design/methodology/approach

Coatings of copper-aluminum alloy powder at different contents (Wt.% = 50%, 60%, 70% and 80%) were prepared by the high-temperature heat treatment process. The microstructure and component of the coatings were characterized by scanning electron microscope, X-ray diffraction, energy dispersive spectrometer and X-ray photoelectron spectroscopy. The electrochemical properties of the coating were explored by electrochemical impedance spectroscopy.

Findings

The results show that the aluminized layer was successfully constructed on the surface of 90/10 copper-nickel alloy, the composition of the coating was composed of copper-aluminum phase and aluminum-nickel phase, the existence of the aluminum-nickel phase was formed by the diffusion of Ni elements within the substrate and because of the diffusion, the Al-Ni phase was distributed in the middle and bottom of the coating more. The Al-Ni phase is considered to be the enhanced phase for corrosion resistance. When the copper-aluminum alloy powder content is 70 Wt.%, the corrosion resistance is the best.

Originality/value

The enhancement of corrosion resistance of 90/10 copper-nickel alloy by the copper-aluminum alloy powder was revealed, the composition of the aluminized layer and the mechanism of corrosion resistance were discussed.

Keywords

Acknowledgements

Declaration of competing interest: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Citation

Gao, Y., Chen, X., Liu, P., Zhou, H., Fu, S., Li, W., Liu, X., Ma, F., Zhu, Y. and Wu, J. (2021), "Influence of high-temperature aluminizing treatment on the corrosion resistance of 90/10 copper-nickel alloy", Anti-Corrosion Methods and Materials, Vol. 68 No. 5, pp. 365-372. https://doi.org/10.1108/ACMM-04-2021-2467

Publisher

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Emerald Publishing Limited

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