A new environmentally friendly approach to prepare superhydrophobic colored stainless steel surface for decoration, anti

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A new environmentally friendly approach to prepare superhydrophobic colored stainless steel surface for decoration, anti-corrosion and self-cleaning Jun-e Qu1,3, Chaoqi Yu1, Chunhui Nie1, Hairen Wang1,*, Zhiyong Cao1,2, Yang Li2, and Xinyun Wang2,* 1

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory of Green Preparation and Application for Materials, Ministry of Education, Hubei Key Laboratory of Polymer Materials, Hubei University, 368 Youyi Road, Wuhan 430062, Hubei, People’s Republic of China 2 State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China 3 Engineering Research Center of Nano-Geo Materials of Ministry of Education, China University of Geosciences, Wuhan 430074, People’s Republic of China

Received: 8 May 2020

ABSTRACT

Accepted: 21 August 2020

Application of colored stainless steel has stimulated impressive concern following present development in decoration industry since its reusability, easy processing and high corrosion resistance. However, the current technologies are not acceptable to chromium-free, antipollution and self-cleaning scenario. Here, we exploit a triangular potential scan process combined with subsequent spraying modification by submicron SiO2 particles and fluorosilane, to fabricate colored superhydrophobic surfaces on stainless steel substrates. Comprehensive characterizations of the surface were performed in terms of color, morphology, composition, structure, wettability, fretting contact durability and corrosion resistance by chromaticity coordinates, scanning electron microscope–energy dispersive X-ray analysis, X-ray photoelectric spectroscopy, atomic force microscopy, contact angle, micro-friction experiment, potentiodynamic scanning and immersion corrosion test. By changing cycling numbers of the triangular wave potential in a simple NaOH solution, a series of different colors was successfully obtained. After spraying treatment, these colorful surfaces exhibited long-term stable superhydrophobic, self-cleaning properties, excellent fretting contact durability and satisfied corrosion resistance. The successful preparation of superhydrophobic colored surfaces offers the possibility of

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Springer Science+Business

Media, LLC, part of Springer Nature 2020

Handling Editor: David Balloy. Jun-e Qu and Chaoqi Yu have contributed equally.

Address correspondence to E-mail: [email protected]; [email protected]

https://doi.org/10.1007/s10853-020-05293-z

J Mater Sci

providing stainless steel with both decoration value and self-cleaning function simultaneously by our proposed chromium-free fabrication process.

Introduction The increase in demand for colored stainless steel (SS) is particularly conspicuous in design and architectural decorations for its fascinating appearance, anti-corrosive nature and reusability. The color of SS surface is related to the interference effect of light, which is produced by the interference

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