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Title: A general strategy towards superhydrophobic self-cleaning and anti-corrosion metallic surfaces : an example with aluminum alloy
Authors: Zheng, Shunli
Li, Cheng
Zhang, Yupeng
Xiang. Tengfei
Cao, Ying
Li, Quanli
Chen, Zhong
Keywords: Engineering::Materials
Issue Date: 2021
Source: Zheng, S., Li, C., Zhang, Y., Xiang. Tengfei, Cao, Y., Li, Q. & Chen, Z. (2021). A general strategy towards superhydrophobic self-cleaning and anti-corrosion metallic surfaces : an example with aluminum alloy. Coatings, 11(7), 788-.
Project: SERC 1528000048
Journal: Coatings
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 superhy-drophobic 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.
ISSN: 2079-6412
DOI: 10.3390/coatings11070788
Rights: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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