Coatings
·
2022
·Vol. 12
·期 4
·447
·
IF 3.236
Yingxiang Ma,Dan Jiang,Yuping Yang,Li Ma,Jian Zhou,Guosheng Huang
In this study, the urea-formaldehyde (UF)-tung oil solution of phenolic amide (PA) microcapsules to realize anti-fouling and anti-corrosion integration was synthesized by the in situ polymerization method. The compounds and structures were optimized by investigating six kinds of different emulsifiers. The results showed that high-core-content and narrow-particle-size-distribution microcapsules could be synthesized with sodium dodecyl benzene sulfonate (SDBS)/polyvinyl alcohol (PVA), and the core content of the microcapsules was 75 wt% at microcapsule sizes from 24.07 to 71.33 µm. The results of self-healing coatings showed that when the content of microcapsules in the coating exceeded 10 wt%, the healing agent released from the scratched surface could cover the naked metal effectively, which could pass a 7 day neutral salt spray test without rust at the scratched area. A sufficient dose anti-fouling agent can be provided to prevent diatoms and mussels from adhering. The present work shows that the complex emulsifier can better control the particle size distribution and microstructure of the microcapsules, and the admixture of the microcapsules into the resin epoxy coating can realize excellent anti-corrosion and anti-fouling functions.Keywords:self-healing;microcapsules;anti-corrosion;anti-fouling
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 7
·1412
·
IF 4.967
Kai Lyu,Xiaoyan Liu,Ruidan Liu,Heng Yang,Yang Qiao,Surendra P. Shah
In the marine service environment, metal materials have a serious risk of corrosion. The corrosion rate of metal materials will be accelerated by the dual action of temperature change and alkali salt in saline-alkali environment. In order to delay the metal materials’ corrosion rate and prolong their service life, this paper used a CeO2–GO (4:1) nanocomposite prepared by the hydrothermal synthesis method to make an anticorrosion coating. The anticorrosion performance was evaluated by stereo microscope and 3D images of the corrosion site were fitted for calculation. The state evolution of the CeO2–GO (4:1)/EP coating immerged in a simulated saline-alkali solution was studied by open circuit potential (OCP), electrochemical alternating current impedance spectroscopy (EIS), Mott–Schottky curve and Tafel curve. The results indicated that CeO2–GO (4:1) nanocomposites exhibited good resistance compared with graphene oxide and nano cerium oxide in a simulated saline-alkali environment. The research in this paper lays a firm theoretical foundation for the application of nano cerium-oxide-modified graphene oxide anticorrosive coating in saline-alkali environment engineering.Keywords:CeO2–GO;corrosion depth;saline-alkali;anticorrosion
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Can He,Meng Cai,Yu Huang,Xiaoqiang Fan,Minhao Zhu
Despite Ti 3 C 2 T x MXene has certified tremendous promise for improving the anti-corrosion/wear of epoxy resin, it falls short of matching the protective standards under long-term extreme conditions. Herein, 2-methylimidazole zinc salt ZIF-8 was grown in-situ on amino-functionalized Ti 3 C 2 T x nanosheets and doped with cerium cations (P + -Ti 3 C 2 T x @ZCe). The Ti 3 C 2 T x -based composite was then parallel arranged within epoxy coating utilizing electrophoretic deposition technique to prepare a novel self-healing intelligent coating (PMX@ZCe). The encapsulation structure of P + -Ti 3 C 2 T x @ZCe was investigated by XRD , FTIR, XPS, FE-SEM, TEM, Zeta potential and TG techniques. Furthermore, the corrosion/wear resistance and self-healing performances of PMX@ZCe were discussed detailedly and the strengthening mechanism of P + -Ti 3 C 2 T x @ZCe was revealed. Results indicate that PMX@ZCe maintains the highest |Z| 0.01Hz value of 1.24 × 10 10 Ω cm 2 after 4 weeks of electrochemical test and exhibits excellent self-healing efficiency of 153 % under artificial scratch, which is ascribed to the release of Ce 3+ /Ce 4+ that could form insoluble protective films at the coating/metal interface. The wear rate of PMX@ZCe is 2.29 × 10 −5 mm 3 /N · m about 56 % lower than that of EP. PMX@ZCe possesses satisfactory corrosion/wear protection performance, thanks to the synergy of good interfacial interaction , parallel-aligned barrier effect and active-passive protection. This work provides a new design thinking for MXene-based intelligent protective coatings that can meet the demands of multi-service environments.
研究领域:
材料科学
·
表面工程
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Guangyu Zhu,Fuyan Kang,Xiaoya Ding,Chunxiao Yin,Fa-Qian Liu
Biofouling has been a persistent challenge for offshore equipment, significantly affecting its longevity. In this study, two-dimensional (2D) ZIF-7 nanosheets were synthesized via a hydrothermal method and modified with polydopamine (PDA) to enhance their dispersibility. A multifunctional ZIF-7@PDA-CeO2 nanocomposite was then prepared through in situ growth, where CeO2 was uniformly and securely anchored onto the ZIF-7@PDA surface, facilitated by the large specific surface area and its electrostatic interactions between ZIF-7@PDA. UV–vis absorption spectra demonstrate that the ZIF-7@PDA-CeO2 exhibit haloperoxidase-like (HPO-like) catalytic activity, efficiently catalyzing the oxidation of NH4Br and H2O2 to generate HBrO. Antibacterial assays indicate that ZIF-7@PDA-CeO2 possesses strong bactericidal activity and effectively inhibits biofilm formation. Furthermore, ZIF-7@PDA-CeO2 are used as fillers to prepare ZIF-7@PDA-CeO2/EP composite coating, and the antibacterial and long-term corrosion resistance is also explored. We believe this work offers a sustainable solution to the challenges of biofouling and corrosion in marine environments.
研究领域:
材料科学
·
海洋工程
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Zaihang Zheng,Yan Liu,Yuan Bai,Jijia Zhang,Zhiwu Han,Luquan Ren
Inspired by typical creature living surface with hydrophobicity, the hydrophobic graphene surface was successfully achieved on aluminium alloy substrate by a novel route. It is composed of two steps: biomimetic microstructure processing (BMP) on substrate and then preparation-transfer process of graphene via chemical vapor decomposition (CVD). The surface structure morphology, wettability and anti-corrosion were systematically investigated. It was found that the static water contact angle for the as-prepared surface was as high as 130.8 ± 1°, demonstrating that the hydrophobic surface is formed on aluminium alloy substrate. It can be interpreted by the synergistic effect between BMP and CVD methods in constructing the biomimetic and hydrophobic graphene surface. Besides, the anti-corrosion property of Al alloy was improved by forming CVD-grown graphene coating on the substrates according to the results of electrochemical corrosion experiments. The synergistic method was not only applied to fabricate hydrophobic graphene film but also provided a versatile route in multifunctional graphene film suited in wide application.
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
·
2020
·Vol. 13
·期 2
·326
·
IF 3.057
Yanxuan Ma,Yingrui Zhang,Jiatong Liu,Yi Sun,Yajie Ge,Xiaoning Yan,Jian Wu
Polyurea microcapsules with Ethylenediamine (EDA) as the core material were synthesized. A set of characterization methods, including optical and scanning electron microscopy (OM and SEM), the Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) were used to confirm the microcapsule morphology and chemical structures. The influence of emulsifier content and stirring rate on size and morphology of the microcapsules was investigated, and the self-healing performance of EDA-Polyurea microcapsule/epoxy coatings was evaluated by electrochemical impedance spectroscopy (EIS) measurements. The results showed that the microcapsules obtained had good spherical shape with a mean diameter of 0.54–0.70 μm. Compared with pure core material, the microcapsule showed excellent thermostability, and the content of core materials was up to 56.00 wt%. The epoxy coating with 5.0 wt% EDA-Polyurea microcapsules achieved average corrosion resistance efficiencies of 90.00%, significantly enhancing the capability of the scratched coating to resist external corrosion.Keywords:ethylenediamine;polyurea;microcapsules;self-healing;anti-corrosion
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Gengzhe Shen,Lin Xu,Jing Kong,Chi Tat Kwok,Jingle Wang,Liuyan Zhang,Xiaohua Jie,Zhipeng Sun,De Ning,Zhengjian Chen
In this study, a new Al-LPM composite coating was in-situ deposited on the Al alloy via a facile one-pot hydrothermal method . Morphological and compositional characterizations revealed a tri-layered structure of the Al-LPM coating, namely, zinc aluminum-layered double hydroxide (ZnAl-LDH)/poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS)/MoS 2 . ZnAL-LDH was deposited closest to the surface of Al alloy , and the metallic ion-cross-linking of PEDOT:PSS makes the 3D coating more robust. The unique structure endows the coating with superior protective properties against both corrosion and wear. For anti-corrosion, the Al-LPM coating showed very high self-corrosion potential (-0.092 V) and small self-corrosion current density (46.0 μA cm −2 ) (vs. Al substrate with -1.157 V and 354.8 μA cm −2 , respectively), long-lasting high corrosion resistance (>57,000 Ω cm 2 ) during the immersion test, and the almost intact surface morphology and composition after 360 h corrosion. For anti-wear, the friction coefficient of the Al-LPM coating was determined to be < 0.2, which was much smaller than for the Al substrate (> 0.4). Also, there were no serious wear marks and grooves left after the dry-friction test.
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
Materials Today Chemistry
·
2025
·
IF 6.7
Huaiyin Chen,Zhonghe Wang,Jun Li,Xiaolin Liu,Congxiang Li,Yongzhao Li,Weihe Yu,Longmin Liu,Yi Zhang,Yuekun Lai,Weilong Cai
ZIF-8 is considered as a promising functional material in anti-corrosion coating applications. However, ZIF-8 hydrolyzes easily, especially in acidic and salty media, due to its unstable Zn–N coordination bonding and hydrophilic crystal surface, which reduces anti-corrosion durability of the coatings. In this study, highly hydrophobic modification of ZIF-8 particles was performed through simple surface ligand exchange with 5,6-dimethylbenzimidazole (DMBIM). The as-prepared ZIF-8/DMBIM particles showed high water-repellency and enhanced chemical stability in acidic, neutral, and alkaline media, and excellent compatibility and barrier function in epoxy coatings. As a consequence, ZIF-8/DMBIM modified epoxy coatings showed significantly enhanced corrosion resistances in acid, alkali and salt aqueous solutions with pH 3.0–11.0. Electrochemical impedance spectroscopy tests demonstrated that, after 20 days of immersion in 3.5 wt% NaCl solution at all the studied pH, the |Z| 0.01 Hz values of ZIF-8/DMBIM modified epoxy coatings were approximately two orders of magnitude higher than of the original epoxy coatings. This work provides an idea for the development and application of ZIF materials in more fields, and innovative anti-corrosion coatings based on functional modification of materials.
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
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Lei Wu,Qiuyan Ye,Kun Zhang,Xiaoyan Guo,Jiaqiao Li,Yongnan Chen,Fan Fang,Hantao Chang
The inherent porous structure of Micro-arc oxidation (MAO) coatings may facilitate penetration of corrosive ions into the substrate, thereby compromising its corrosion resistance. In this work, the metal-organic framework (MOF) ZIF-8 was employed to seal the micropores in the MAO coating of titanium alloy (MAO-Ti) through a secondary growth method involved initially physically pre-loading crystal seeds into the micropores, followed by solvent thermal synthesis. Consequently, an excellent cohesive pore-sealing coating known as ZIF-8@MAO was successfully developed. The anchoring effect between ZIF-8 in the micropores and the substrate forms a solid blocking layer, which can effectively avoid the issue of traditional sealing layers detaching easily. Additionally, the arranged ZIF-8 crystals on the surface of MAO-Ti imparts excellent hydrophobicity and high stability to the alloy, evidenced by contact angle tests conducted under various solution environments, where the water contact angles (WCAs) exceeded 140°. Moreover, ZIF-8 microcrystals act as effective sealants for the micropores of MAO-Ti, effectively safeguarding the internal titanium alloy matrix against chloride ion infiltration and ensuring long-term corrosion resistance. Electrochemical tests assessing the corrosion resistance of the coatings revealed a significant improvement in the corrosion resistance of the ZIF-8@MAO pore-sealing coating compared to the primary MAO-Ti coating. The charge transfer resistance ( R ct ) increased from 2.05 × 10 4 Ω/cm 2 to 1.287 × 10 9 Ω/cm 2 , while the current density ( I corr ) declined from 2.03 × 10 −8 A/cm 2 to 2.65 × 10 −13 A/cm 2 .
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
MATERIALS LETTERS
·
2017
·
IF 2.572
Xin Wang,Yi Liu,Yongfeng Gong,Xinkun Suo,Hua Li
Liquid flame sprayed polyimide-copper coatings were developed for marine antifouling applications. Mixture of polyimide precursor and copper particles was prepared as the starting feedstock for making the composite coatings. Synthesis of polyimide was achieved during the spraying and polyimide acts as binder to fix copper particles. Copper particles were enwrapped by polyimide matrix and distribute evenly in the coatings. Further electrochemical testing revealed excellent corrosion resistance of the coatings in artificial seawater. The coatings resist effectively colonization of E. coli and Bacillus sp. bacteria on their surfaces, suggesting their remarkable antifouling performances. The results shed light on construction of polymer-based antifouling layers for widespread marine applications.
研究领域:
材料科学
·
海洋工程
·
生物学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Li Li,Yanjun Cui,Zhixia Zhang,Peng Tu,Haipeng Gong,Ping Li
In this work, a novel 3D graphene/Fe 3 O 4 (G-Fe 3 O 4 ) nanocomposite was prepared by a facile one-pot hydrothermal process used to be adulterated into the varnish as an anticorrosive and electromagnetic shielding paint. It is confirmed that the skeleton structure of graphene can effectively inhibit Fe 3 O 4 agglomeration by Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) technique, and the G-Fe 3 O 4 nanocomposites can be well dispersed in the varnish for a longtime without settling. The graphene/Fe 3 O 4 composite varnish shows excellent corrosion resistance both in city water and seawater , besides its corrosion resistance is also superior to that of ordinary anti-rust paint. Moreover, the electromagnetic shielding test confirms that the as-prepared composite varnish shows well electromagnetic shielding performance. This new type of composite varnish has a broad application prospect to be used as urban exterior wall and ships paint.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 44
·e202404251
·
IF 1.9
Zichao Yin,Zhenhua Sun,Junyi Li,Haigang Zhou,Jingjing Qi,Weidong Wang
Graphical A multifunctional coating composed of PTFE, PDMS, and nano silica was successfully prepared via deposition coating and heating treatment in this study, which possessed excellent anti-corrosion, anti-scaling, anti-fouling, anti-icing, and self-cleaning properties. This superhydrophobic coating can be loaded onto various facilities and equipment as top finish, protecting the substrates from water containing contaminants. This coating may have broad applications in the field of metal substrate protection. PTFE-based superhydrophobic coatings have received increasing research and the fabricated coatings exhibited excellent anti-corrosion, anti-scaling, anti-fouling, and anti-icing properties. In order to further enhance the hydrophobicity of PTFE coating, a PTFE-based coating consisted of nano-silica and polydimethylsiloxane (PDMS) was fabricated by deposition coating and annealing treatment. The water contact angle and sliding angle of the coating achieved 160.65° and 3.02°, respectively, demonstrating it possessed superhydrophobic property. Due to its excellent surface feature, the coating exhibited resistance to milk, coffee, and mud water, and could be easily cleaned by water flow. Besides, the water droplet on the coating had a longer freezing time and the ice droplet could be easily removed from the coating. Ascribed to the abundant nonpolar groups and the air cushion formed under water, the prepared coating had outstanding anti-scaling and anti-corrosion properties. The electrochemical impedance of the steel plate with the coating (above 9000 Ω·cm 2 ) increased by two orders of magnitude compared with the non-coating one (78.2 Ω·cm 2 ), and the anti-scaling rates of the coating towards BaSO 4 and SrSO 4 were all above 80%. It is promising that the coating will be a competitive candidate in many application fields.
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
危险品化学品经营许可证（带存储）