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Article

A General Strategy towards Superhydrophobic Self-Cleaning and Anti-Corrosion Metallic Surfaces: An Example with Aluminum Alloy

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Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
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College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Jiangjun Avenue, Nanjing 210016, China
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AVIC Taiyuan Aero Instruments Co. Ltd., 137 Bingzhou South Road, Taiyuan 030000, China
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School of Architectural and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Huashan District, Ma’anshan 243032, China
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Institute of Materials Science and Engineering, Anhui University of Technology, 59 Hudong Road, Huashan District, Ma’anshan 243032, China
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School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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Authors to whom correspondence should be addressed.
Academic Editor: Robert J. K. Wood
Coatings 2021, 11(7), 788; https://doi.org/10.3390/coatings11070788
Received: 23 April 2021 / Revised: 20 June 2021 / Accepted: 28 June 2021 / Published: 30 June 2021
(This article belongs to the Special Issue New Anti-corrosion Coatings for Marine Materials)
Corrosion and contamination of metallic structures can cause loss of their functionality as well as aesthetic values. In this study, we describe a general strategy to prepare superhydrophobic self-cleaning and anti-corrosion surfaces for metallic structures. As a specific example, a superhydrophobic coating (SHC) on aluminum alloy was prepared by a simple etching combined with the decoration of a low-surface-energy material. The optimal SHC has a water contact angle (CA) at ~157.4° and a sliding angle (SA) of ~8.3° due to the synergy of binary hierarchical structures and chemical modification. The SHC showed low adhesion to dry contaminants and a series of liquids, displaying a good self-cleaning effect. The SHC maintained superhydrophobicity after exposure to air and humid condition at 60 °C for 7 days. In addition, the electrochemical measurements reveal that the anti-corrosion performance was enhanced by reducing the corrosion current density (Jcorr) by 1 order of magnitude and increasing the corrosion potential (Ecorr) by 0.527 V as compared to the bare Al alloy substrate after immersion for 168 h. View Full-Text
Keywords: superhydrophobic; aluminum alloy; etching; self-cleaning; anti-corrosion superhydrophobic; aluminum alloy; etching; self-cleaning; anti-corrosion
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MDPI and ACS Style

Zheng, S.; Li, C.; Zhang, Y.; Xiang, T.; Cao, Y.; Li, Q.; Chen, Z. A General Strategy towards Superhydrophobic Self-Cleaning and Anti-Corrosion Metallic Surfaces: An Example with Aluminum Alloy. Coatings 2021, 11, 788. https://doi.org/10.3390/coatings11070788

AMA Style

Zheng S, Li C, Zhang Y, Xiang T, Cao Y, Li Q, Chen Z. A General Strategy towards Superhydrophobic Self-Cleaning and Anti-Corrosion Metallic Surfaces: An Example with Aluminum Alloy. Coatings. 2021; 11(7):788. https://doi.org/10.3390/coatings11070788

Chicago/Turabian Style

Zheng, Shunli, Cheng Li, Yupeng Zhang, Tengfei Xiang, Ying Cao, Quanli Li, and Zhong Chen. 2021. "A General Strategy towards Superhydrophobic Self-Cleaning and Anti-Corrosion Metallic Surfaces: An Example with Aluminum Alloy" Coatings 11, no. 7: 788. https://doi.org/10.3390/coatings11070788

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