JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2016
·Vol. 21
·期 2
·469-476
·
IF 2.327
Li Min,Gao Bingliang,Liu Chengyuan,Chen Wenting,Wang Zhaowen,Shi Zhongning,Hu Xianwei
AlCl 3 /amide (acetamide, propionamide, butyramide) ionic liquids were used as the electrolytes to study the electrodeposition behavior of aluminum on a tungsten electrode. Cyclic voltammograms on the tungsten electrode indicate that Al(III) ions can be reduced to aluminum only within the molar ratio range of 1.1 to 1.5 and the reduction potentials of Al(III) ions strongly depend on the molar ratio of AlCl 3 /amide. Raman spectra results reveal that the electroactive specie of AlCl 3 /amide ionic liquids is Al 2 Cl 7
− . Aluminum coatings were prepared at −0.25 V (vs. Al/Al 3+ ) and at 313 K in AlCl 3 /amide ionic liquids with the molar ratio of 1.3. The SEM and cross-sectional SEM images show that all the obtained aluminum films are silver-colored, thick, and adherent. The EDS and XRD analysis confirm that the obtained deposits are pure aluminum. The present results can provide a new route for aluminum electrodeposition under ambient conditions.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2024
·
IF 2.2
Zhang Fangfang,Zuo Yuanyuan,Wu Degang,Yang Guanda,Schubert Dirk W.,Nie Lin
This study explores the surface modifications and properties of magnesium substrates through the application of alumina coatings for improved functionalities. Surface microstructures were investigated using a field emission scanning electron microscope after roughening treatments and alumina spray coatings. Elemental mapping revealed the distribution of coatings, demonstrating successful modifications with silane coupling agent and uniform alumina distribution. Contact angle measurements showcased enhanced hydrophobicity post-alumina coating, with notable improvements in contact angles over various liquids and self-cleaning assessments. Furthermore, wear resistance tests indicated the durability of the alumina coatings, displaying high stability even after repeated abrasions with sandpaper. The self-cleaning tests unveiled the remarkable performance of alumina-coated surfaces in repelling contaminants, underscoring their effective self-cleaning characteristics. Furthermore, the electromagnetic wave absorption properties of magnesium substrates coated with alumina demonstrated outstanding absorption efficiency, notably within the 7-11 GHz frequency range. This comprehensive analysis highlights the potential and effectiveness of alumina coatings in enhancing the properties of magnesium sheets, specifically in improving hydrophobicity, wear resistance, self-cleaning capabilities, and electromagnetic wave absorption.
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
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Chuntao Li,Junfeng Wei,Mincong Chen,Xiaoxiao Guan,Xi Yang,Zhenghui Li,Chunping Ma,Xiaoji Ye
To avoid the health risks of Cr 6+ in traditional Dacromet coatings, developing chromium-free zinc-aluminum coatings attracts increasing attention in recent years. However, the state-of-the-art chromium-free zinc-aluminum coatings always have very high sintering temperatures over 250 °C, causing serious energy consumption. In the present work, for the first time, we report the fabrication of a novel chrome-free zinc-aluminum coating based on polysilazane. The results show that the polysilazane forms crosslinking structure via Si–O–Si backbones and the equilibrium anticorrosion effect can be achieved with a very low curing temperature less than 130 °C, which is much lower than current zinc-aluminum coatings. The zinc/aluminum particles present unique layered structure that are tightly contacted with the substrate, forming a dense structure with good barrier protection. Electrochemical characterization reveals that the coating exhibits capacitive impedance behavior at the initial stage of immersion test, indicating excellent shielding effect. As the immersion time increases, the activation corrosion of metal powder occurred under the action of corrosion medium, which plays a sacrificial anode protection role, and the resulting corrosion products can play certain shielding effect. Owing to above structural merits and electrochemical features, the developed chrome-free zinc-aluminum coating based on polysilazane demonstrates a superior corrosion resistance .
研究领域:
材料科学
·
表面工程
·
防腐蚀技术
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 5
·2147-2156
·
IF 2.394
Wang Hongqiang,Yang Guangchang,Lai Feiyan,Chu Youqi,Zhang Xiaohui,Ma Zhaoling,Li Qingyu
Ni-rich oxide materials suffer poor rate capability and rapid capacity fading, which seriously hinder its further commercialization. In this study, an ultrathin Al 2 O 3 coating layer on surface of the LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM) material was prepared with Al(OC 4 H 9 ) 4 in organic medium; the process followed by heat treatment achieves Al doping. The synergistic effect of surface modification and Al doping significantly enhances the capacity retention and rate performance, while the resistance to moisture is also improved. The coated sample with 2wt% Al 2 O 3 shows superior electrochemical performances with an initial capacity of 175 mAh g −1 at 1 C and a retention of 80% after 500 cycles, which is 10% higher than the uncoated raw materials. In addition, it delivers 152 mAh g −1 at 10 C, suggesting an excellent rate capability. The substitution of Al 3+ and the Al 2 O 3 protective layer facilitates ion diffusion dynamic characteristic and improves electrochemical stability.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-15
·
IF 3.9
Tan Siwei,Ruan Xiaoyin,Ye Haipeng,Shao Ji,Shan Xiaoyue,Shi Yanpeng,Le Yanna
Wastewater treatment requires materials with a high capacity for adsorbing diverse pollutants. A novel adsorbent was synthesized herein by wrapping glucose/graphene oxide hybrids with aluminum hydroxide in a cetyltrimethylammonium bromide microemulsion and was used for dual adsorption of fluoride (FL) and methylene blue (MB) from water. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) analysis, and Barrett–Joyner–Halenda analysis were employed to characterize the synthesized adsorbent. The pH, initial pollutant concentration, adsorbent dose, and contact time for dual adsorption were determined. Isotherm and kinetic models were applied to investigate the dual adsorption mechanism. Attributed to the good microstructure, enhanced surface area, and ion-exchange behavior, the maximum adsorption capacity of this adsorbent was 14.8 mg/g for FL (1.0 g/L adsorbent) and 232.6 mg/g for MB (0.2 g/L adsorbent) simultaneously at pH 6.0. The enhanced adsorption efficiency and multi- selectivity of this adsorbent suggest its potential to decrease the regeneration frequency of adsorption materials, lower processing costs, and mitigate environmental impacts. This adsorbent is suitable for future development as a sustainable slow-release agent, enabling prolonged use with straightforward operational procedures and efficiency.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yunyun Ge,Jiangbo Cheng,Xiuyu Wang,Lin Xue,ShuaiShuai Zhu,Baosen Zhang,Sheng Hong,Yuping Wu,Xiancheng Zhang,Xiu-Bing Liang
Thermal sprayed aluminum coatings are widely scalable to corrosion protection of the offshore steel structure. However, the corrosion rate of the Al coating increases considerably due to the severe marine environment. It has remained a challenge to improve the corrosion resistance and protective ability of Al coatings. The superhydrophobic surface provides a potential way to improve the corrosion resistance of metal materials. Hence, the development of superhydrophobic Al coatings with superior corrosion resistance is of great interest. In this work, the feasibility of the preparation of superhydrophobic Al coatings on a steel substrate was explored. First, Al coatings were prepared onto the steel substrate by the arc-spraying process, followed by ultrasonic etching with 0.1 M NaOH solution, and afterward passivated using 1% fluorosilanes. The effects of the etching time on morphology, contact angle, and corrosion resistance of the Al coatings were evaluated. The schematic model of the fluorosilane passivation process on the Al coating surface was provided. The micro/nanoscale surface structure of the low-surface-energy fluorosilanes promotes the wetting angle of 153.4° and a rolling angle to 6.6°, denoting the superhydrophobic properties. The superhydrophobic Al coating surface displays excellent self-cleaning performance due to its weak adhesion to water droplets. The corrosion current density of the superhydrophobic Al coating (1.36 × 10–8 A cm–2) is 2 orders of magnitude lower than that of the as-sprayed Al coating (1.18 × 10–6 A cm–2). Similarly, the charge-transfer resistance is found to be 12 times larger for the superhydrophobic Al coating and the corresponding corrosion inhibition efficiency reaches 98.9%. The superhydrophobic Al coating displays superior corrosion resistance and promising applications in a marine corrosion environment.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Chi Ma,Yong Luo,Bao-Chang Sun,Meng-Jun Su,Guang-Wen Chu,Jian-Feng Chen
An efficient method of coating alumina (Al2O3) on stainless steel has been investigated by matching the rough surface of the substrate with different sizes of Al2O3 particles. An empirical correlation was established based upon the data of a controllable and measured pore size of the substrate surface by varying etching conditions. The correlation agreed fairly well with experimental results (deviations of ±20%). The Al2O3 coatings prepared by powders with average particle size of 324 nm had an optimal adhesion performance, and the minimum of coating weight loss on the inner surface of tubule after ultrasonic vibration was 1.7 wt %. The developed method of Al2O3 coating has potential prospects for the preparation of monolithic catalyst support.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THERMAL SPRAY TECHNOLOGY
·
2020
·Vol. 29
·期 8
·1991-2000
·
IF 2.522
Zhao Hang,Zhang Haijun,Chen Xiuyong,McDonald André,Li Hua
Thermal-sprayed aluminum (Al) coatings are widely used for corrosion protection in marine environments. The corrosive nature of seawater and the synergy with marine microbes make for aggressive service environments for Al coatings. In this study, Al coatings were deposited on 316L stainless steel (316L SS) substrates by using wire arc spraying. Chlorella vulgaris , a typical marine fouling algae, was used to investigate the effects of biofilm adhesion on the electrochemical behavior of wire arc-sprayed Al coatings in artificial seawater environment. Electrochemical measurements via dynamic potential polarization curves and electrochemical impedance spectroscopy were used to monitor the corrosion behavior after attachment of microbes on Al coatings and bare, uncoated 316L SS. Analysis of the corrosion products was conducted using scanning electron microscope and energy-dispersive spectrum. The results showed that the Chlorella vulgaris biofilm slowed the corrosion of the Al coatings. This suggested that Chlorella vulgaris biofilm was a critical contributing factor to the corrosion behavior of the Al coatings. Moreover, a mechanism was suggested to illustrate the corrosion behavior of Al coatings in the presence of Chlorella vulgaris .
研究领域:
材料科学
·
海洋生物学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Zhongping Li,Zhaowen Huang,Ning Xie,Xuenong Gao,Yutang Fang,Zhengguo Zhang
Expanded graphite (EG), as a new kind of functional carbon-based material, is a vital supporting material and heat transfer enhancer for preparing highly conductive form-stable composite phase change materials (PCMs). However, the hydrophobic nature of EG makes it difficult to incorporate with inorganic PCMs. In this work, we intended to solve this drawback and a modified EG named Al 2 O 3 -coated EG which was characterized by enhanced hydrophilicity was developed via a heterogeneous nucleation technique and subsequent heat treatment. Experiments found that the Al 2 O 3 layer on the surface of EG was uniform and essentially amorphous , and was well-bonded to EG via chemical interactions between oxygen atoms from Al 2 O 3 and carbon atoms from EG. The hydrophilicity and oxidation resistance of Al 2 O 3 -coated EG could be enhanced by increasing the amount of Al 2 O 3 . Most importantly, compared with EG, the water contact angle of Al 2 O 3 -coated EG dropped from 90.7° to 33.9° when only 4.4 wt% Al 2 O 3 was used, indicating that the hydrophilicity of EG could be greatly enhanced by low cost. Moreover, molecular dynamics (MD) simulation of the hydrophilicity of EG and Al 2 O 3 -coated EG proved that the preparation of Al 2 O 3 -coated EG was an efficient and feasible method to improve the hydrophilicity of EG.
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
RSC Advances
·
2015
·Vol. 5
·期 26
·20357-20364
·
IF 3.84
Jinjin Gao,Chunxia Li,Jingfang Zhou,Liqiang Lu,Chengjian Zhao,Yingchun Zhu
Alumina coatings have wide-ranging applications by virtue of their inherent wear and corrosion resistance and attractive dielectric and diffusion barrier properties. In many cases, they do not meet the antibacterial demand to eliminate microbiologically-induced corrosion and diseases. The aim of this work is to prepare plasma sprayed alumina–nanosilver (Al2O3/Ag) coatings and investigate their antibacterial properties with various compositions. Moreover, Al2O3/Ag coatings are optimized to use minimum amounts of silver nanoparticles (AgNPs) and exhibit excellent antibacterial properties. Al2O3 coatings with five different amounts of AgNPs were deposited on titanium alloys substrates by plasma spray. The Al2O3/Ag coatings, which were denoted as A1, A2, A3, A4 and A5, were prepared by using α-Al2O3 powders containing 1 ppm, 10 ppm, 100 ppm, 1000 ppm and 10 000 ppm AgNPs, respectively. The composition and morphology of Al2O3/Ag coatings were investigated by X-ray diffraction and scanning electron microscopy. The antibacterial activity of Al2O3/Ag coatings was tested using Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) as model strains of Gram negative and Gram positive bacteria, respectively. The bacterial adhesion was also examined by employing both of the bacteria to observe bacterial adhesion status and evaluate antibacterial property of as-prepared coatings. The results showed the Al2O3/Ag coatings with more than 10 ppm AgNPs exhibited strong antibacterial property against E. coli and S. aureus. Bacterial adhesion assays showed that A2–A5 had anti-adhesive property of E. coli and S. aureus, which was in accordance with the antibacterial results. Moreover, the main factors influencing the antibacterial properties of Al2O3/Ag coatings were discussed with silver nanoparticles and hydrophobicity of the coatings.
研究领域:
材料科学
·
微生物学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL SPRAY TECHNOLOGY
·
2021
·Vol. 31
·期 1
·119-129
·
IF 2.757
Wen Jianxin,Song Ziheng,Chen Xiuyong,Li Hua
Biofouling has been persisting as a worldwide problem due to the difficulties in finding efficient environment-friendly antifouling coatings for long-term applications. Developing novel coatings with desired antifouling properties has been one of the research goals for surface coating community. Recently hydrogel coating was proposed to serve as antifouling layer, for it offers the advantages of the ease of incorporating green biocides, and resisting attachment of microorganisms by its soft surface. Yet poor adhesion of the hydrogel on steel surfaces is a big concern. In this study, porous matrix aluminum coatings were fabricated by cored wire arc spray, and the sizes of the pores in the aluminum (Al) coatings were controlled by altering the size of the cored powder of sodium chloride. Silicone hydrogel was further deposited on the porous coating. The hydrogel penetrated into the open pores of the porous Al coatings, and the porous Al structure significantly enhanced the adhesion of the hydrogel. In addition, hydrogel coating exhibited very encouraging antifouling properties.
研究领域:
材料科学
·
表面工程
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Jingbao Wang,Jingmao Zhao,Mohammad Tabish,Fan Shi,Qi Cheng,Lijun Peng
The application of inhibitor as an efficient method to protect Zn Mg Al (ZMA) coated steel is first reported in this work. The inhibition performances of newly synthesized cerium gluconate (CG) for ZMA coated steel in 0.05 M NaCl solution were investigated by scanning electron microscopy (SEM), X-ray photoelectron spectroscope (XPS), electrochemical impedance spectroscopy (EIS) measurements, potentiodynamic polarization (PDP) measurements and neutral salt spray (NSS). The synthesized CG exhibits excellent inhibition efficiency of 98.4% at 200 ppm, which is much better than the individual or combined use of sodium gluconate (SG) and cerium (III) nitrate hexahydrate (CNH). Additionally, CG shows long-term protection for ZMA coated steel. A synergistic inhibition model between Ce oxide/hydroxide precipitation with CG adsorption film is proposed based on the obtained results. This work offers a promising option for the corrosion protection of ZMA coated steel.
研究领域:
材料科学
·
腐蚀与防护
✓ 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）