A General Strategy towards Superhydrophobic Self-Cleaning and Anti-Corrosion Metallic Surfaces: An Example with Aluminum Alloy
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Surface Modification and Superhydrophobicity · Advanced Sensor and Energy Harvesting Materials · Aerosol Filtration and Electrostatic Precipitation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Jiangjun Avenue, Nanjing 210016, China
AVIC Taiyuan Aero Instruments Co. Ltd., 137 Bingzhou South Road, Taiyuan 030000, China
School of Architectural and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Huashan District, Ma’anshan 243032, China
Institute of Materials Science and Engineering, Anhui University of Technology, 59 Hudong Road, Huashan District, Ma’anshan 243032, China
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
Funding
Natural Science Foundation of Anhui Province · Improvement Program of Basic and Clinical Cooperative Research of Anhui Medical University · Research Improvement Program in Stomatologic Hospital & College of Anhui Medical University · Grants for Scientific Research of BSKY from Anhui Medical University · the Agency for Science, Technology and Research (A*STAR) of Singapore
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