A high-temperature and corrosion-resistant Co-Al2O3 composite superhydrophobic coating for marine exhaust emission systems

Chen, Aiguo, Fu, Zishi, Zhang, Yi, Huang, Zan, Valera Medina, Agustin ORCID: https://orcid.org/0000-0003-1580-7133, Xiao, Hua and Wu, Xiaoyang 2025. A high-temperature and corrosion-resistant Co-Al2O3 composite superhydrophobic coating for marine exhaust emission systems. Presented at: 3rd International Conference on Materials Science and Intelligent Manufacturing, Guangzhou, China, 10-12 January 2025. Journal of Physics: Conference Series. , vol.3009 (1) IOP Publishing, 10.1088/1742-6596/3009/1/012012

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Abstract

To address the challenges of high-temperature corrosion in marine exhaust systems this study utilizes a one-step electrodeposition technique to fabricate a superhydrophobic Co-Al2O3 composite coating on low-carbon steel. A comprehensive analysis was conducted to examine the coating’s surface morphology, hydrophobic characteristics, self-cleaning capability, corrosion resistance, and thermal stability. The results demonstrated that the composite coating exhibited remarkable hydrophobicity, with a contact angle (CA) of approximately 163.7°. Furthermore, after heating to 500 °C, the coating maintained superior corrosion resistance, achieving a corrosion protection efficiency (η) of 89.8 % in a 3.5 wt % sodium chloride solution. Electrochemical impedance spectroscopy (EIS) revealed that the coating effectively suppressed electrochemical reactions, thus prolonging the protection of the metal surface. These findings suggest that the Co-Al2O3 composite coating provides potential protective capabilities for metals in marine environments, making it suitable for high-temperature corrosion resistance in gas turbines. This approach has the potential to extend equipment lifespan and reduce maintenance costs.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Schools > Engineering
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Type: cc-by
Publisher:	IOP Publishing
ISSN:	1742-6588
Date of First Compliant Deposit:	19 May 2025
Last Modified:	19 May 2025 16:45
URI:	https://orca.cardiff.ac.uk/id/eprint/178358

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