Corrosion Behavior of Copper Bearing Steels and the Derived In-Situ Coating

Li, Na; Yan, Ling; Wang, Shaodong; Wang, Changshun; Zhang, Hongmei; Ai, Fangfang; Jiang, Zhengyi

doi:10.3390/met11091462

Open AccessArticle

Corrosion Behavior of Copper Bearing Steels and the Derived In-Situ Coating

by

Na Li

^1,2,*

,

Ling Yan

^2,*,

Shaodong Wang

¹,

Changshun Wang

²,

Hongmei Zhang

¹,

Fangfang Ai

² and

Zhengyi Jiang

^1,3,*

¹

School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China

²

State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009, China

³

School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia

^*

Authors to whom correspondence should be addressed.

Metals 2021, 11(9), 1462; https://doi.org/10.3390/met11091462

Submission received: 1 August 2021 / Revised: 10 September 2021 / Accepted: 13 September 2021 / Published: 15 September 2021

(This article belongs to the Special Issue Advances in Corrosion and Protection of Materials)

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Abstract

Using a period immersion wet/dry cyclic corrosion test, in-situ copper-coated steels prepared by corroding copper-bearing steels were investigated in this study. The steel with a higher copper content (>3%) has a higher initial corrosion rate due to its obvious two-phase microstructure. The corrosion rates of all copper bearing steels tend to be stable after a certain time of corrosion. A copper-rich layer is formed between the matrix and the rust layer, which is due to the diffusion of copper from the rust layer to the metal surface. The copper’s stability under this corrosion condition led to the formation of a thin copper-rich film, which was uncovered after removing the rust by choosing appropriate descaling reagents. The copper coating was generated from the matrix itself during the corrosion process at 25 °C, which provided a new approach for producing in-situ composite materials without any bonding defect. It is found that the corrosion rate, corrosion time, and copper content in steel all affect the formation of copper-rich layer. In addition to the noble copper surface, the electrochemical corrosion test results show that the corrosion resistance of copper-coated steel has been significantly improved.

Keywords: copper; steel; coating; descaling; corrosion; composite

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MDPI and ACS Style

Li, N.; Yan, L.; Wang, S.; Wang, C.; Zhang, H.; Ai, F.; Jiang, Z. Corrosion Behavior of Copper Bearing Steels and the Derived In-Situ Coating. Metals 2021, 11, 1462. https://doi.org/10.3390/met11091462

AMA Style

Li N, Yan L, Wang S, Wang C, Zhang H, Ai F, Jiang Z. Corrosion Behavior of Copper Bearing Steels and the Derived In-Situ Coating. Metals. 2021; 11(9):1462. https://doi.org/10.3390/met11091462

Chicago/Turabian Style

Li, Na, Ling Yan, Shaodong Wang, Changshun Wang, Hongmei Zhang, Fangfang Ai, and Zhengyi Jiang. 2021. "Corrosion Behavior of Copper Bearing Steels and the Derived In-Situ Coating" Metals 11, no. 9: 1462. https://doi.org/10.3390/met11091462

APA Style

Li, N., Yan, L., Wang, S., Wang, C., Zhang, H., Ai, F., & Jiang, Z. (2021). Corrosion Behavior of Copper Bearing Steels and the Derived In-Situ Coating. Metals, 11(9), 1462. https://doi.org/10.3390/met11091462

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Corrosion Behavior of Copper Bearing Steels and the Derived In-Situ Coating

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