APPLIED CLAY SCIENCE
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2025
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IF 5.8
Xianliang Li,Yawei Shao,Yanqiu Wang,Junyi Wang
In this work, a montmorillonite (MMT)-based composite coating with long-term corrosion protection for mild steel was prepared. This composite coating incorporated the montmorillonite@polydopamine@cerium phytate (MMT@PDA@PACe) nanofiller, prepared by the easily layer-by-layer surface assembly method. Electrochemical impedance spectroscopy (EIS) and surface morphology studies showed that the prepared composite coating exhibited long-term protective performance, self-healing performance, and good integrity. In this instance, on the one hand, two-dimensional (2D) MMT could block the path of corrosive media penetrating the coating. Also, organic modification of PDA and PACe could enhance the dispersibility and compatibility of inorganic MMT fillers, thus enhancing the coating barrier effect. On the other hand, composite materials could perceive corrosion reactions and actively release corrosion inhibitors to improve corrosion resistance performance further. The coating's self-healing performance and release characteristics of corrosion inhibitors were investigated by the EIS and inductively coupled plasma optical emission spectrometer (ICP-OES) tests. Moreover, after 60 d immersion, the |Z| 0.01 Hz value of the 0.5 wt% MMT@PDA@PACe composite coating was over 10 9 Ω·cm 2 , which is 3 orders of magnitude higher than that of the bare coating. Simultaneously, the adhesive force studies were applied to the composite coatings, and the results illustrated that the coating had the highest dry conditions adhesion force with 5.43 MPa and the lowest adhesion force loss rate at 14.1 % after 30 d of immersion.
研究领域:
材料科学
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表面工程
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腐蚀防护
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Ziyang Zhou,Zhengquan Wang,Ranming Niu,Siyu Huang,Julie M. Cairney,Xueling Fan,Eason Yi-Sheng Chen
Rust conversion and composite coatings offer effective solutions for enhancing corrosion resistance in structural materials used in marine environments. They are both cost-effective and easy to implement. In this study, we introduce a novel coating that combines tannic acid-based iron-rust conversion with graphene-based nanocomposites, resulting in improved corrosion resistance for epoxy coatings on steel surfaces. We employed a variety of characterization techniques to assess the superior anti-corrosion and structural properties of these new coatings, including X-ray diffraction spectroscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy with focused ion beam and energy dispersion X-ray spectrometer, transmission electron microscopy, electrochemical impedance spectroscopy, as well as mechanical testing. The development of the new materials holds promise for environmental benefits and widespread industrial applications of nanocomposites in the field of rust conversion coatings.
研究领域:
材料科学
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海洋工程
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xin-Yu Wang,Sai Wang,Jun-Feng Su,Rong-Yue Shao,Qin-Yu Xing
The design of anti-icing structures is challenging for epoxy coatings, which are widely used in aircraft, wind power generation equipment, and outdoor buildings. Inspired by the principle that bird feathers are not easily frozen, a smart biomimetic anti-icing epoxy coating based on controlled-secreting hydrophobic small molecules in microcapsules was designed in this work. The remarkable feature of these microcapsules is that they can secreting small molecule oil at low temperature, but the release rate is very low at room temperature controlled by restriction of gel in the microcapsules' shell. Optical and SEM morphology showed that microcapsules were globe-shaped particles with compacted shells. FT-IR results indicated that the core material of glycerol trioctanoate was well protected by the shell skeleton of cross-linked methylated melamine-formaldehyde (HMMM) resin. Gelatin was filled in the microporous structure of the shell skeleton structure. AFM results showed that the gel material shrank at low temperatures, producing tiny holes in the shell material. The temperature sensitivity of gelatin was the valve for core release. The controlled-secreting property of microcapsules under various temperatures was measured using high-oil absorbent paper. Pore microstructure appeared on the shell of microcapsules after an alcohol delusion of the gel process. It was found that the secreting rate of the core material from the microcapsule was faster at low temperatures (-10∼ 20 °C) because of the shrinkage of gel material in the skeleton structure. SEM results also indicated that the microcapsules were dispersed homogeneously in the epoxy coating without any accumulation phenomenon. Moreover, the interface between microcapsules and epoxy resin was stable, and no interface separation debonding appeared even under the temperature of −20–40 °C. Surface hydrophobicity tests indicated that the epoxy coating with 3.0 wt% microcapsules had the largest water contact angle of 95°. The core material-secreting traces were observed, which confirmed that the hydrophobic small molecules migrated to the surface of the epoxy coating. Ice shear force values proved that more additive microcapsules provided more hydrophobic small molecules' secreting capacity to the coating's surface under a low temperature of −15 °C. This anti-icing function was sustainable and stable under violent temperature-change cycling, ensuring the coating material had a longer anti-icing service life.
研究领域:
材料科学
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生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Weiping Zheng,Lifeng Hao,Yang Zhou,Bin Gu,Zewen Jiang,Yujie Fang
To fulfill practical demands for metal protection, a more in-depth exploration of the corrosion resistance of cerium dioxide nanoparticles (CeO 2 NPs) is essential. In this work, biomimetic porous CeO 2 NPs, featuring a high concentration of oxygen vacancies , were synthesized using a sol-gel method. Biomimetic porous CeO 2 NPs, characterized by the presence of oxygen vacancies , served as nanocontainers for benzotriazole (BTA) loading. Following this, TEOS-BTA@CeO 2 NPs were prepared by introducing tetraethyl orthosilicate (TEOS), a TEOS film encapsulating BTA@CeO 2 . Through electrochemical and salt spray testing, the 3 % TEOS-BTA@CeO 2 coating demonstrated superior corrosion resistance for the substrate when compared to both the 3 % CeO 2 coating and the 3 % BTA@CeO 2 coating. Throughout the entire corrosion process, the intelligent release of BTA facilitated by the TEOS film, coupled with the reduction in corrosion current due to oxygen vacancies serving as electron-capturing centers in cerium oxide, further enhances the corrosion resistance of CeO 2 NPs. This work marks a significant advancement in the exploration of nanocomposites for the practical utilization of CeO 2 NPs in combating metal corrosion.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Xinya Lou,Huamin Liu,Peiyan Li,Jicai Liang,Ce Liang
A new type of filler was added to epoxy resin to prepare a composite coating with excellent corrosion and weathering resistance. The simple synthesis process and nonpolluting raw materials of this filler contribute to the development of green chemistry. Specifically, lignin was encapsulated in mesoporous silica, the synergistic effect between the two resulted in the formation of lignin/mesoporous silica composite particles (MSN-L) with excellent ultraviolet (UV) resistance. Moreover, MSN-L was incorporated into the epoxy coating to form an excellent barrier against the penetration of corrosive media. The coating was characterized using electrochemical impedance spectroscopy (EIS), contact angle analysis (WCA), confocal laser scanning microscopy (CLSM) and other testing methods. The results show that the epoxy coating doped with 2 wt% MSN-L exhibits good corrosion resistance and excellent surface stability before and after the accelerated aging experiments. The impedance value of the coating was 10 6 Ω•cm 2 and the corrosion current was 10 −4 mA/cm 2 . After UV aging, the surface roughness was 71.3 % lower and the degree of reduction in the water contact angle was reduced by 61.2 % compared to the blank coating. This corrosion and weather-resistant coating significantly extends the service life of outdoor coatings and provides effective protection for metals used outdoors.
研究领域:
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Haoxiang Chen,Feifei Su,Zhonghe Wang,Congxiang Li,Zhihong Fan,Dongfang Zhang,Guoqiang Liu,Huaiyin Chen
Superhydrophobic coatings show great application prospect in various fields such as corrosion protection, anti-icing, waterproof and oil-water separation, due to their unique properties. However, the poor mechanical stability and the preparation complexity severely limit their practical application. In this study, superhydrophobic epoxy coatings with excellent mechanical stability were facilely constructed based on fluoridation modification of amine curing agent and TiO 2 nanoparticles. Epoxy curing agent, diethyltriamine, was fluorinated by the reaction with heptafluorobutyric acid to obtain the required low surface energy. Meanwhile, fluorinated TiO 2 nanoparticles were prepared through the reaction with 1 H,1 H,2 H,2H-perfluorooctanetriethoxysilane and further used for generating the roughness. The properties of the coatings were adjusted by the addition amount ratio of TiO 2 nanoparticles to epoxy resin. The performance tests of water wetting, abrasion resistance, and corrosion resistance of the coatings were carried out. The results show that the hydrophobicity of epoxy coating is greatly improved after fluoridation modification of amine curing agent, and the greater the amount ratio fluorinated TiO 2 nanoparticles to epoxy resin, the higher hydrophobicity of the modified coating. The modified coating prepared under optimal conditions displays excellent abrasion resistance, self-cleaning and anti-corrosion performances. The electrochemical impedance spectroscopy tests in 3.5 wt% NaCl solution reveal that the hydrophobically modified epoxy coating has the largest charge transfer resistance, which is 8 orders of magnitude larger than that of uncoated Q235 steel. This work provides a simple method for preparation of superhydrophobic epoxy coatings with excellent mechanical stability, and will enlighten researchers to develop more superhydrophobic coatings and their applications.
研究领域:
材料科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Jing Zhang,Changhua Li,Xiaofeng Zhang,Hao Chen,Rui Gou,Chao Zhang,Dan Sun,Yi He
The use of graphene-based materials as anticorrosion coatings to protect metals is always a topic of discussion. In this work, silicon nitride (Si3N4) was aminated to improve its water dispersibility. Then it is attached to the graphene oxide (GO) surface to improve compatibility with epoxy (EP) resin as well as conductivity. The results of Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and zeta potentials test analyses indicated that Si3N4–NH2@GO with a layer-point structure has been successfully prepared. The corrosion resistance of the composite coatings was characterized by electrochemical impedance spectroscopy (EIS) and polarization curve analysis, and the wear resistance of the composite coatings was tested by friction and wear tests. The results showed that 1.0% Si3N4–NH2@GO has excellent corrosion and wear resistance. The use of Si3N4–NH2@GO layer point structures in this study broadens the way for GO applications.
研究领域:
材料科学
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防腐蚀技术
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2019
·
IF 3.42
Yanhua Lei,Zhichao Qiu,Ning Tan,Hailiang Du,Dongdong Li,Jingrong Liu,Tao Liu,Weiguo Zhang,Xueting Chang
Polyaniline/cerium dioxide (PANI/CeO 2 ) nanocomposite (NPs) was synthesized by in situ polymerization of aniline in the presence of CeO 2 NPs. Various analytical facilities, i.e., powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM), were utilized to characterize the synthesized CeO 2 and PANI/CeO 2 NPs. The coatings prepared from the synthesized PANI/CeO 2 NPs exhibited excellent corrosion resistance that was superior to epoxy coatings added with PANI in NaCl solution. The exceptional improvement of corrosion protection performance of the PANI/CeO 2 /epoxy coatings is associated with the synergetic protection of the enhancement of the protective barrier due to the role of CeO 2 NPs and PANI against the diffusion of aggressive ions (e.g., Cl − ) and the improvement of self-healing protection attributed to the redox behavior of PANI. Thus, the hybrid PANI/CeO 2 NPs are considered as the best route to enhance the protection performance of the epoxy coatings on carbon steel.
研究领域:
材料科学
·
防腐蚀工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Fan Lei,Bingyu Wu,Haoyang Sun,Feng Jiang,Junlong Yang,Dazhi Sun
Hydrophobic graphite fluoride (GrF)-reinforced epoxy coatings are fabricated on steel substrate with a simple, solventless, and surfactant-free approach. The contact angle can be enhanced from 72° to 103° after the introduction of 1 wt % GrF to epoxy, suggesting the superior hydrophobic surface. The composite coatings on steel substrate exhibit the prominent corrosion protection performance as revealed by electrochemical impedance spectroscopy. The mechanism responsible for the corrosion resistance enhancement can be attributed to the synergistic effects of electrical insulating, water repellent, and barrier properties, resulting from the well-dispersed superhydrophobic GrF platelets in epoxy matrix. Moreover, 1 wt % GrF/epoxy coatings also present significant scratch resistance performance due to the uniform dispersion of the inorganic platelets and the enhanced storage modulus. The results indicate that constructing GrF/epoxy coatings with improved corrosion protection and scratch resistance property are capable of preventing metals suffering from corrosion attack and crack damages with a scalable fashion.
研究领域:
材料科学
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表面工程
·
腐蚀防护
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Xiaobo Zhu,Qingqing Yan,Li Cheng,Hao Wu,Haichao Zhao,Liping Wang
Designing coatings with long term anticorrosion performance remains a great challenge. Herein, a newfangled cationic dopamine-reduced graphene oxide (DRGO + ) nanosheet is prepared as a filler for epoxy coating via simple dopamine oxidative self-polymerization and ionization reaction. DRGO + can be dispersed stably in commercial water-based cathodic epoxy emulsion for more than 45 days without precipitation. Due to the presence of –NH 3 + in DRGO + , it can be self-aligned parallel arrangement in the composite coating (DRGO + /EP coating) under the electric field. This highly parallel DRGO + nanosheets tremendously improve the physical barrier effect of the coating and prolong the penetration path of the corrosive medium. Electrochemical impedance spectroscopy (EIS) test showed that the initial low-frequency impedance modulus of 0.5%-DRGO + /EP coating is as high as 4.79 × 10 10 Ω cm 2 when the content of DRGO + is 0.5 wt%, which is an order of magnitude higher than that of pure epoxy coating (4.07 × 10 9 Ω cm 2 ), exhibiting extraordinary corrosion resistance. Finally, the protective mechanism of composite coating is revealed by the identification of corrosion products and local-EIS techniques. In view of the validity of DRGO + , this work highlights the potential route for the large-scale preparation of coatings with superior long-term anti-corrosion.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Ting Wang,Heyi Ge,Kaili Zhang
A novel antistatic anticorrosion composite coating was designed. The conductive core-shell straticulate structured silica@graphene and antimony doped tin oxide (ATO) were introduced in the waterborne epoxy coating to significantly decrease electrical resistivity. Reduced graphene oxide (RGO)-encapsulated functionalized silica hybrids (f-SiO 2 @RGO) were fabricated from sodium borohydride reduction of electrostatically assembled f-SiO 2 @GO hybrids with the help of silane coupling agent. The morphologies, the corrosion resistance and the antistatic properties were investigated. In the ATO + f-SiO 2 @RGO/epoxy coating, the f-SiO 2 @RGO sheets were evenly dispersed in coating, forming unique core-shell straticulate structure that effectively prevented the penetration of electrolyte, and constructed a conductive network at the coating-tinplate. The results showed that the antistatic and the anticorrosive performances of ATO + f-SiO 2 @RGO/epoxy coating were significantly enhanced as compared with the addition of 5% other fillers in coating, which includes the same amount of ATO. This superior core-shell f-SiO 2 @RGO straticulate structure and ATO particles, with their prominent conductivity , can make full use of the enhancement effect of different components and thus endow waterborne epoxy coatings with outstanding corrosion resistance and antistatic properties overall.
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
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Kaiyun Wu,Taijiang Gui,Jiahao Dong,Jing Luo,Ren Liu
A novel kind of robust PANI microcapsules were prepared via a one-pot photopolymerization and interfacial aniline polymerization. In our strategy, lignosulfonate was employed as emulsifier to stabilize oil-in-water emulsion, in which the oil phase was composed of self-healing agent (tung oil), photo-crosslinkable acrylic monomer and crosslinker. Under UV light, the acrylic monomer and crosslinker were photo-polymerized and formed a cross-linked polyacrylic shell, endowing sufficient robustness to the microcapsules. Aniline was subsequently added to the water phase and polymerized at the oil-water interface, which converted to a second shell and endowed anticorrosion property. FTIR, TGA and SEM tests proved the successful preparation of PANI microcapsules, and the loading of tung oil in the microcapsules reached 55.1 wt%. These microcapsules could keep integrity and be uniformly dispersed in water-based epoxy coating. The incorporation of PANI microcapsules in the coating not only imparted self-healing properties to the coatings, but also greatly enhanced its anticorrosion performance. The scratch test indicated that the coatings containing only 5 wt% microcapsules could autonomously heal a scratch with 50 μm in width. In addition, the healed coatings with the microcapsules showed almost no corrosion products after 500 h salt spray test (SST), while for the scratched neat epoxy coating, a large area of coating peeled from the substrate after only 200 h SST. The remarkably enhanced corrosion protection capability was owing to the closure of the scratch by the self-healing effect and the inhibition efficiency of PANI.
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
危险品化学品经营许可证（带存储）