Preparation and Properities of Superamphiphobic Surface on B10 Cu-alloy by Alkaline Etching

doi:10.11902/1005.4537.2024.353

Journal of Chinese Society for Corrosion and protection

2025, Vol. 45

Issue (5): 1381-1389 DOI: 10.11902/1005.4537.2024.353

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Preparation and Properities of Superamphiphobic Surface on B10 Cu-alloy by Alkaline Etching

XU Yacheng, JIA Xueyuan, WEI Xiwang, GAO Rongjie(

)

School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China

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XU Yacheng, JIA Xueyuan, WEI Xiwang, GAO Rongjie. Preparation and Properities of Superamphiphobic Surface on B10 Cu-alloy by Alkaline Etching. Journal of Chinese Society for Corrosion and protection, 2025, 45(5): 1381-1389.

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Abstract

The superamphiphobic surface was prepared on B10 Cu-alloy by etching with (NH₄)₂S₂O₈ and NaOH mixed solution, followed by oxidation at 160 ℃ and fluorosilane modification. The microscopic morphology, chemical composition and electrochemical property of the superamphiphobic surface were characterized by means of Laser scanning confocal microscopy (LSCM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical means etc.Results show that the optimal preparation conditions were etching at 40 ℃ for 5 h, oxidation at 160 ℃ for 1 h, and 1.0% fluorosilane modification for 1 h. The superamphiphobic surface presents contact angle of water and ethylene glycol 158.1° and 151.2° and the rolling angle close to 0° and 5°, respectively. The electrochemical test shows that compared with the bare alloy, the free corrosion potential of the superamphiphobic alloy is shifted to -0.204 V versus calomel electrode used as the reference electrode, the corrosion current density decreases from 1.192 × 10^-5 A·cm^-2 to 1.649 × 10^-6 A·cm^-2, the corrosion suppression efficiency is 94.3%, and the corrosion resistance is significantly improved. Self-cleaning performance test indicates that the superamphiphobic surface possess excellent self-cleaning properties, and mechanical wear resistance test shows that the superamphiphobic surface can maintain a certain protective effect on the substrate over a long sliding distance.

Key words: B10 Cu-alloy etching superamphiphobic surface anti-corrosion

Received: 28 October 2024 32134.14.1005.4537.2024.353

ZTFLH:

TG174

Fund: National Natural Science Foundation of China(U2441256)

Corresponding Authors: GAO Rongjie, E-mail: dmh206@ouc.edu.cn

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	XU Yacheng
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https://www.jcscp.org/EN/10.11902/1005.4537.2024.353 OR https://www.jcscp.org/EN/Y2025/V45/I5/1381

Fig.1 Diagram of preparation process

Fig.2 Schematic diagram of the friction experiment of the superamphiphobic sample

Table 1 Surface wettability change of the sample before and after the superamphiphobic treatment

Fig.3 Surface morphologies of bare sample (a) and superamphiphobic sample at different magnification rates (b-d)

Fig.4 Laser confocal main images (LSCM) (a, d), height images (b, e), and 3D images (c, f) of the surface of bare sample and superamphiphobic sample

Table 2 Surface roughness parameters of the bare sample and superamphiphobic sample

Fig.5 XRD pattern of the superamphiphobic sample

Fig.6 EDS mapping of superamphiphobic sample and distribution map of each element

Fig.7 XPS spectra of superamphiphobic sample: (a) survey, (b) O 1s, (c) Cu 2p, (d) F 1s, (e) C 1s, (f) Si 2p

Fig.8 FT-IR spectrum of the as-prepared superamphiphobic surface with PFDTS modification

Fig.9 Nyquist (a), impedance module (b) and phase angle (c) plots of the bare sample and superamphiphobic sample in 3.5% NaCl solution and its equivalent circuit (d)

Table 3 Electrochemical fitting parameters of the bare sample and superamphiphobic sample

Fig.10 Potentiodynamic polarization curves of bare sample and superamphiphobic sample

Fig.11 Self-cleaning experiment of the bare sample (left) and superamphiphobic sample (right) Al₂O₃ powder (a, b), tea (c, d) and milk (e, f) simulate natural pollutants

Fig.12 Change of contact angle of water and ethylene glycol on the surface with sliding distance

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