JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2025
·
IF 2
Li Peining,Wang Shouren,Xiao Zhen,Li Yang,Zhang Luyu,Wang Gaoqi
Underwater vehicles can conduct underwater exploration and military rescue operations and play a significant role in marine economic development and national defense. The fluid resistance control and corrosion resistance of underwater vehicles are essential indexes for evaluating the performance of underwater vehicles in particular marine environments and harsh conditions. The 7075 aluminum alloy, widely used in spacecraft shells, was selected as the material. We prepared a drag-reduction and robust surface based on shark skin by laser-ablation and plasma electrolytic oxidation. Then, the surface free energy was further modified by chemical modification. The ceramic coating exhibited superhydrophobicity with a water contact angle of 155.6° and roll-off angle (RA) of 5.5°. Compared with Bare Al, the corrosion current density of the superhydrophobic ceramic coating was reduced by 4 orders of magnitude since ZnO-NPs could notably enhance the corrosion resistance of Al alloys. Moreover, due to the protective effect of the ceramic coating and microstructure, the superhydrophobic coating exhibited excellent mechanical durability. Based on numerical simulation, the drag reduction effect of biomimetic microstructure under different Reynolds numbers was investigated. The experimental results indicated that biomimetic microstructure demonstrated notable drag reduction capabilities compared to smooth surfaces, stabilizing at approximately 28% during laminar flow states. Thus, applying this coating method to the underwater vehicle shell was expected to reduce the fluid resistance and extend the operational lifespan in the marine corrosive environment.
研究领域:
材料科学
·
海洋工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yuanting Deng,Zihao Li,Zuozhu Yin,Yuhua Chen,Chenggang Yang,Yidan Luo,Mingshan Xue
Through the reasonable design of the microstructure of superhydrophobic coatings, the solid-liquid contact area between the substrate and the liquid can be reduced, the penetration of corrosive medium into the liquid can be reduced, and the flow resistance can be lowered. In this paper, a bionic superhydrophobic composite coating of aluminum matrix material was prepared by the spraying method using KH550 coupling agent-modified silica (KH550@SiO 2 ) and stearic acid-modified titanium dioxide (STA@TiO 2 ) mixed with waterborne polyurethane . The performance was tested by water contact angle , drag reduction measurements, and electrochemical analysis . The composite coating has a droplet contact angle of 163.4° and a rolling angle of 4° and is extremely wettable. The synergistic effect of the air layer and coating densities resulted in excellent corrosion inhibition efficiency of the coating in a 3.5 wt % NaCl solution. In addition, the composite-coated spheres can form a continuous air cavity during water ingress, which is essential for extending the drag reduction capability of the coating in liquids. The design and preparation of superhydrophobic composite coatings have promising applications in large-area corrosion protection and voyage damping of metals.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
·
2017
·
IF 0.736
X. Guan,P. Luo,S. J. Dong
Aluminum (Al)-based materials composited of different low melting point materials were prepared by mechanical ball-milling. Hydrogen production using these materials was investigated to help resolving the safety issues associated with the storage and transportation of hydrogen. The phase composition and microstructure of the Al-based composited materials were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. As observed in this study, the addition of low melting point metals (such as Sn, Bi and In) helped to lower the initial Al-water reaction temperature and to increase the yield in the production of hydrogen. Samples of optimized compositions, Al–6% Sn–4% Bi and Al–6% Sn–4% In, were found to exhibit high hydrogen production yields of up to 448 and 515 mL, respectively. Meanwhile, their hydrogen generation rates were increased.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Di Zhang,Ruirui Zhao,Guolong Li,Kai Yue,Jingyuan Zhao,Songnan Zhang
Icing is a natural phenomenon, and it is unavoidable, leading to severe economic issues and endangering life safety, especially icing over the aircraft fuselage. Hence, it is highly desirable to adopt effective method to address it. Wherein, the construction and modification of hydrophobic coating is a promising way. In this study, the aluminum-based photothermal/electrothermal composite hydrophobic coating with excellent performance was fabricated by facile spraying of epoxy resin, graphene, polydimethylsiloxane and gaseous nano-silica over etching Al. This coating displayed excellent hydrophobicity, with a water contact angle of 137.4°, which effectively delayed the freezing time of droplets on the cold platform at −10 °C to 360 s. Notably, the superior electrothermal performance enabled the temperature to reach to ca. 80 °C at the voltage of only 1.8 V, melting the ice particle in 164 s and the ice layer with 3 mm thickness in 360 s under the voltage of 1.5 V. Besides, at 1 sunlight intensity, the photothermal effect realized the surface temperature of ca. 45 °C, and the ice layer with 3 mm thickness was melted within 460 s. The multi-effect deicing coating also exhibited excellent photothermal/electrothermal stability and self-cleaning ability. These findings raise new possibilities for the design and development of metal substrate anti-icing/deicing functional coating material.
研究领域:
材料科学
·
能源工程
·
航空工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Yunfei Hu,Xiangkang Cao,Xiaoze Ma,Jinglong Pan,Guangyi Cai,Xinxin Zhang,Zehua Dong
Recently, anti-corrosion coatings with auto-inhibition and self-reporting on their premature flaws are becoming more and more attractive. In this work, we engineered a cerium nitrate/8-hydroxyquinoline (Ce-HQ) hybrid pigment to endow epoxy coatings with corrosion self-inhibiting and fluorescent self-reporting performances via molecule design. The Ce-HQ pigments were synthesized by physical mixture and then dispersed into the commercial epoxy coating. Once the epoxy coating gets degraded, the underneath aluminum alloy matrix may corrode to produce Al 3+ ions, which can compete with Ce 3+ ions in the Ce-HQ complex, and then chelate with dissociative 8-HQ to form fluorescent Al-HQ complex, due to the higher bonding strength of Al 3+ with 8-HQ than Ce 3+ ions. Thus, not only the responsive releasing of Ce 3+ ions and 8-HQ can inhibit the underlying Al alloy, but the newly formed Al-HQ complex could indicate the location and severity of coating flaws through fluorescent emission under UV light. Electrochemical impedance evidenced that the composite epoxy coating containing 1 % mass Ce-HQ presents high corrosion resistance even after 504 h of salt spray test, showing 90 % corrosion refraining efficiency. This work may enlighten an approach to developing self-healing and self-diagnosis coating for premature corroded Al alloy beneath coatings via reactive release and fluorescent visualization.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2019
·Vol. 23
·期 6
·1903-1909
·
IF 2.531
Zhang Baoguo,Shi Zhongning,Shen Lingling,Liu Xiaozhen,Xu Junli,Wang Zhaowen
A highly stable solvate ionic liquid comprising a 2:1 (mol/mol) mixture of ethylene carbonate (EC) and AlCl 3 was used for near room-temperature electrochemical codeposition of an Al-Nd alloy using chlorides as precursors. This liquid is low-cost, easy to prepare, and has high electrochemical stability. The ionic structure was analyzed by 27 Al nuclear magnetic resonance; Raman spectroscopy and the dissolution phenomenon was studied by ultraviolet-visible spectroscopy. The dissolution mechanism of NdCl 3 in this solvate ionic liquid was derived as 3[AlCl 2 (EC) n ] + + 2NdCl 3 ⇆ 2Nd(III) + 3[AlCl 4 ] − + 3 n EC. Cyclic voltammetry was used to explore the electrochemical behavior of Nd- and Al-containing species, revealing that the reduction of Al and Nd are both one-step electron-gaining processes. X-ray diffraction confirmed that an Al-Nd alloy can be obtained in the form of thermally stable Al 2 Nd by potentiostatic electrolysis at high cathode overpotential (− 3.5 V vs. Al). Although the deposited alloy layer is not dense, Al-containing solvate ILs have immense potential in green electrometallurgy because of their higher tunability and similar properties to ILs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2020
·
IF 0.512
Le Lv,Wei Liu
Sol-gel method is the most popular way for the preparation of organic-inorganic hybrid anticorrosion coatings. Such sol-gel coatings is environmental friendly and chemical stable, showing enhanced corrosion resistance for metal substrates. Here, a saline with aniline substituted group N-(3-(trimethoxysilyl)propyl)aniline (TMPA) has been used together with tetraethyl orthosilicate (TEOS) for the preparation of organic-inorganic hybrid coating (OIHC) materials by sol-gel approach. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) measurements show that the hybrid coatings exhibit high corrosion resistance on aluminum substrates.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
THIN SOLID FILMS
·
2020
·
IF 2.03
Anhang Li,Min Sun,Zhidong Ma,Sifan Chen,Guiyu Zhu,Yue Zhang,Wei Wang
Polyaniline-carboxylic multiwalled carbon nanotubes (PANI-CMWCNTs) nanocomposites was prepared by a facile in-situ polymerization. PANI-CMWCNTs nanocomposites were incorporated into polyvinyl butyral (PVB) to prepare a protective coating on AA2024 aluminum substrates using a spin coating method. Besides, Poly (methylhydrosiloxane) (PMHS) was added to increase the crosslinking of the coating and form a hydrophobic surface. Scanning electron microscope, transmission electron microscope, UV–visible spectroscopy and Fourier transform infrared spectrum were used to characterize the morphologies and structures of different composites. The corrosion protection properties were investigated by electrochemical impedance spectroscopy and Tafel polarization in 3.5 wt% NaCl solution. Results showed that the PVB/PANI-CMWCNTs/PMHS composite coating exhibited remarkably enhanced anticorrosion properties, the corrosion current density (I corr ) of the coating decreased to 0.039 μA•cm −2 , and the impedance value (|Z| 0. 01 Hz) of the coating significantly improved compared with bare aluminum and exceeded 10 7 Ω•cm 2 , and the long-term corrosion resistance of the coating could last for over 60 days. The anticorrosive efficiency of PVB coating was promoted and an idea for the preparation of environmentally friendly coatings was proposed.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）