Materials Research Express
·
2020
·Vol. 6
·期 12
·1250j2
·
IF 1.929
Shengkai Yang,Kelei Zhuo,Zezhong Zhang,Jingli Yang,Yujuan Chen,Jianji Wang
In this work, we aimed to prepare graphene with high concentration (CG) or quality (indicated by ID/IG) by sonication-assisted exfoliation in aqueous sulfonated asphalt (SAS) solution. The highest CG can reach 0.181 mg ml−1, while the smallest ID/IG is only 0.331 in the investigated range. Meanwhile, we observed that CG and ID/IG changed in the opposite trend with the increase of SAS concentration, and reached their extreme values simultaneously. This was attributed to SAS's agglomeration-induced redistribution of total energy absorbed by graphite between exfoliation and crushing. The graphene size was mainly within 100–400 nm and most of layer number was <5. The stabilization of graphene dispersion comes from the electrostatic repulsion between negatively charged SAS groups adsorbed on the graphene sheets. As the protective coating of aluminium, the graphene with relative small (for H2SO4 solution) or large (for NaCl solution) size, relative high defect content and annealing at proper temperature can improve the anticorrosion performance of graphene.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHOTOENERGY
·
2020
·
IF 1.88
Peng Wang,Dayong Cai
When aluminum alloy is present in a Cl−-rich environment, the surface oxide film is easily damaged, resulting in faster dissolution of the substrate. The application of graphene-modified anticorrosion coating can effectively prevent the occurrence of corrosion. In this study, to explore the corrosion resistance of graphene-modified anticorrosion coating on the surface of aluminum alloy, we prepared graphene-modified anticorrosion coating on the surface of aluminum alloy and investigated the corrosion resistance mechanism. Epoxy resin primer and polyurethane top coat were modified by predispersed reduced graphene oxide (rGO). Scanning electron microscope (SEM) and Raman spectrum were used to investigate the microstructure of graphene-modified anticorrosion coating, and it was found that the addition of rGO could effectively improve the porosity defect of epoxy resin primer. Electrochemical workstation was used to quickly characterize the corrosion resistance of graphene-modified anticorrosion coating, and the change of the electrochemical curve during soaking in 3.5% NaCl was investigated every 5 hours. It was found that the application of rGO to modify the anticorrosion coating could improve the corrosion resistance of the anticorrosion coating, and as the soaking time increased, the corrosion resistance of graphene-modified anticorrosion coating changed regularly. The study results indicated that when the content of rGO was 0.4%, the porosity of epoxy coating decreased from 1.54% to 0.33%, the porosity dropped by an order of magnitude, and the self-corrosion voltage was relatively positive (-0.72434 V). The self-corrosion current density was the lowest (), and at the low frequency, the impedance modulus was the highest (103). After the equivalent circuit fitting, the dispersion index was relatively high, the dispersion effect was relatively weak, and the corrosion resistance of the coating was improved. For graphene-modified anticorrosion coating, in the early stage of corrosion protection, the existence of pores and other defects in the coating might increase the dispersion effect, resulting in greatly decreased corrosion resistance of the coating. In the middle stage of corrosion protection, the pores in the coating would be completely filled by corrosive ions, resulting in a weakened dispersion effect. Therefore, the decrease in the corrosion resistance of the coating was slowed down and became stable.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Mengyu Li,Ning Liu,Jinhang Chen,Qiaoling Li
Based on biological inspiration, we proposed a simple method for preparing anti-corrosion and super-hydrophobic coating. The modified TiO 2 compounded ZnO and epoxy resin were prepared by one-pot method. The surface morphology, resistance, super-hydrophobicity, repairability, impedance, wear resistance, etc. of the prepared material were performed by SEM, FTIR, electrochemical workstation, contact angle, rolling angle measuring instrument and simple homemade devices. As a result, it was found that the coating had full-thickness hydrophobicity, its WCA was up to 155.6°, and its repairability was good. Even in a harsh environment, it still had a long working life. At the same time, it had been found that the key to prolonging the anti-corrosion life of the coating lies in the reduction of the volume of the free polymer, the degree of cross-linked curing of the metal-polymer interior and its bonding with the metal substrate.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Xiaomeng Li,Shuxue Zhou
Modification of MXene is usually necessary for their application in corrosion resistant coatings. Nevertheless, the influence of the grafting degree of modifier is not concerned in the past. In this work, modified Ti 3 C 2 nanosheets (G-Ti 3 C 2 ) with different grafting degree of (3-glycidyloxypropyl)trimethoxysilane (GPS) were obtained by changing GPS dosage, and further incorporated into waterborne epoxy resin coatings (WEP). GPS modification led to deteriorated dispersion in water but improved dispersion stability of Ti 3 C 2 nanosheets in waterborne epoxy resin at appropriate GPS-grafting degree presumably due to the interaction between the liquid epoxy resin droplet and G-Ti 3 C 2 nanosheets. The GPS grafting degree was also critical to get the corrosion resistant nanocomposite coatings . The best corrosion resistance, i.e., with impedance modulus four orders of magnitude higher than that of pure WEP after 30 days' immersion in salt solution as well as the lightest corrosion in salt spray test, was achieved using the Ti 3 C 2 nanosheets modified at the GPS-to-Ti 3 C 2 mass ratio of 30:1. Better dispersion of G-Ti 3 C 2 nanosheets and stronger interaction between epoxy resin matrix and G-Ti 3 C 2 nanosheets should be responsible for the excellent corrosion resistance of the coatings at optimum GPS grafting degree.
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
AIP Advances
·
2024
·Vol. 14
·期 3
·
IF 1.4
Quan Jingru,Dong Tienan,Shi Zixin,Xv Boqiang,Hu Hengming,Hao Shijie,Fan Haojie,Huang Xinyi,Fan Minmin,Cheng Qichen,Hang Zusheng
The instability of UV anti-corrosion coatings poses a significant threat to both air quality and the environment, highlighting the urgent need for efficient and eco-friendly anti-corrosion coatings. In this study, we synthesized a novel material, MXene, known for its well-defined layered structure and exceptional conductivity, by employing a MAX phase etching process. Our investigation encompassed the assessment of MXene’s compatibility within UV coating systems, as well as its dispersion and stability within composite coating systems. We observed that MXene’s substantial specific surface area and robust chemical adsorption capabilities played pivotal roles in the adsorption and stabilization of nanoparticles within the UV coating. Further exploration of MXene-based UV-curable anti-corrosion coatings revealed remarkable resistance to hydrogen-induced corrosion due to MXene’s outstanding electrical conductivity and its ability to regulate surface chemical reactions. This optimization not only enhances UV-curing and photostability performance in UV anti-corrosion coatings but also makes them highly suitable for producing efficient anti-corrosion coatings. This approach demonstrates broad applicability across various substrates where superior corrosion resistance is essential.
研究领域:
材料科学
·
化学工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2024
·
IF 3.4
Kai Yang,Pengxiang Zhang,Zhenzhen Feng,Yunfan Wang,Jian Peng,Bao-Wen Li
2D materials have exhibited great potential for applications in anticorrosion nanocoatings. However, the nanocoating of prefocused graphene shows “corrosion-promoting activity” due to its high conductivity. Metal oxide nanosheets obtained by delaminating layered oxides have been another attractive candidate. This study demonstrates a water-based Ca 2 Nb 3 O 10 (CNO) ink spray coated on magnesium alloys to form a continuous coating without complex functionalization and structural control. The composite coating of Ca 2 Nb 3 O 10 (CNO) and polydopamine (PDA) is fabricated by combining spray- and dip-coating methods. The surface composition and microstructure of the as-prepared coatings are characterized by X-ray diffractometry, Fourier transform infrared, X-ray photoelectron spectroscopy, scanning electron microscopy, and energy-dispersive spectrometry. The anticorrosion performance of the composite coating is evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy, and salt spray tests. The electrochemical results show that the CNO/PDA heterostructure coating provides an enhanced corrosion inhibition efficiency (99.62%) with a corrosion current density of 5.49 × 10 −7 A cm −2 , three orders of magnitude lower than bare AZ31. The immersion tests before and after heat treatment and salt spray tests indicate that the composite coating has good stability and long-term anticorrosion performance. Solution-processed nanocoating and extensible materials design provide a green and facile route to anticorrosion nanotechnology for industrial demands.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Zhen Yang,Yongping Bai,Binxiao Wei,Yutao Cui,Ruolin Wang,Wei Zhang,Yingying Li,Linghui Meng,Yu Wang
A new UV curing strategy is introduced into the curing field of fluorosilicone polymers. This strategy is predicated on the reaction of sulfur radicals generated from disulfide bonds with vinyl groups under the presence of UV light. Here, we engineered and synthesized a kind of novel fluorosilicone polymers (FS-SS) with disulfide bonds and vinyl groups. The disulfide bonds contained in FS-SS undergo photocleavage under ultraviolet irradiation, generating sulfide radicals, which can interact with vinyl groups to complete the curing reaction. Subsequently, the UV curing behavior of coatings on the basis of the novel polymers and photo-initiator 1173 was investigated by FT-IR spectroscopy and a possible UV-curable reaction mechanism based on disulfide bonds and vinyl groups was proposed. The results showed that curing reactions based on disulfide bonds and vinyl groups can reach a relatively high degree of reaction in a short period of time in terms of reaction rate. However, the lower conversion rate of the reaction may be due to the fact that the sulfur radicals generated by disulfide bonds are more inclined to form disulfide bonds rather than undergo addition reactions with vinyl groups. Subsequently, a series of fluorosilicone coatings with good optical transparency (transmittance above 90 %), good hydrophobicity (the lowest value of surface energy is 21.54 mN/m), lower roughness value (Ra values was in the region of 2.24 nm– 12.2 nm) and high temperature resistance were prepared by utilizing this curing strategy. Furthermore, the applicable experiment of fluorosilicone coatings to protect tinplate as anti-corrosive coatings was also performed. The corrosive resistance results formalize its practical value for possible application as preventive coatings.
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
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Shihui Qiu,Wei Li,Wenru Zheng,Haichao Zhao,Liping Wang
Dispersion of graphene in water and its incorporation into waterborne resin have been rarely researched and hardly achieved owing to its hydrophobicity. Furthermore, it has largely been reported that graphene with impermeability contributed to the improved anticorrosion property. Here, we show that highly concentrated graphene aqueous solution up to 5 mg/mL can be obtained by synthesizing hydrophilic polypyrrole (PPy) nanocolloids as intercalators and ultrasonic vibration. On the basis of π–π interaction between PPy and graphene, stacked graphene sheets are exfoliated to the thickness of three to five layers without increasing defects. The corrosion performance of coatings without and with PPy and graphene is obtained by potential and impedance measurements, Tafel curves, and fitted pore resistance by immersing in a 3.5 wt % NaCl solution. It turns out that composite coating with 0.5 wt % graphene additive exhibits superior anticorrosive ability. The mechanism of intercalated graphene-based coating is interpreted as the synergistic protection of impermeable graphene sheets and self-healing PPy and proved by the identification of corrosion products and the scanning vibrating electrode technique.
研究领域:
材料科学
·
腐蚀与防护
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2019
·
IF 5.77
Tianhao Ge,Wenjie Zhao,Xuedong Wu,Yangmin Wu,Lu Shen,Xiaojing Ci,Yanlin He
To make good use of the barrier effect of graphene nanosheets and to reduce the uneven dispersion of zinc particles caused by its sedimentation, coating with alternate structure containing rGO was developed to provide Cu a long-term corrosion protection. Ionic liquid was used to obtain a better dispersion of rGO in solvent, which was proved by TEM, SPM images and sedimentation experiment. The enhanced long-term anti-corrosion protection of alternate coating was revealed by electrochemical tests. OCP and EIS results showed enhanced barrier performance of epoxy-G compared with epoxy and improved sacrificial anode protection of epoxy-Zn-G compared with epoxy-Zn. Tidal range-corrosion simulation test was also performed to show that the alternate coating can stick on copper substrate without peeling off even in harsh corrosive environment for 432 h. Furthermore, EIS, XRD, and XPS spectra together proved that the excellent anti-corrosion property of alternate coating was originated from the combination of sacrificial anode protection provided by zinc-rich-epoxy layer with barrier protection provided by rGO-doping-epoxy layer. This combination makes it reality to protect copper substrate from corrosion for longer time immersion in 3.5 wt% NaCl solution compared with epoxy-Zn-G.
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
Coatings
·
2020
·Vol. 10
·期 2
·129
·
IF 2.436
Heng Yuan,Fugang Qi,Nie Zhao,Pengying Wan,Biao Zhang,Hailong Xiong,Bin Liao,Xiaoping Ouyang
Graphene oxide–titanium (GO-Ti) composite materials were fabricated using GO as a precursor and then anchoring nano titanium (Nano-Ti) particles on GO sheets with the help of a silane coupling agent. Then, the coating samples were prepared by dispersing GO, Nano-Ti particles, and GO-Ti in an epoxy resin at a low weight fraction of 1 wt %. The GO-Ti composites were investigated by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The dispersibility and anti-corrosion mechanism of the coatings were studied by sedimentation experiments, electrochemical impedance spectroscopy (EIS), SEM, and salt spray tests. The mechanical properties of the coatings were analyzed by friction and wear tests. The results showed that the Nano-Ti particles were successfully loaded on the GO surface by chemical bonds, which made GO-Ti composites exhibit better dispersibility in the epoxy than GO. Compared with Nano-Ti particles and GO, the GO-Ti composite exhibited significant advantages in improving the corrosion resistance of epoxy coatings at the same contents, which was attributed to the excellent dispersibility, inherent corrosion resistance, and sheet structure. Among the different proportions of composite materials, the GO-Ti (2:1) material exhibited the best dispersibility and corrosion resistance. In addition, the composite material also greatly improved the wear resistance of the coating.Keywords:graphene oxide;titanium;dispersibility;epoxy resin;anti-corrosive coating
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Shupei Liu,Chijia Wang,Kaka Li,Zihua Wang,Hongxin Luo,Weihao Fan,Huaiyuan Wang
Anti-scaling is a key challenge in various industrial productions. The use of coatings is the most effective strategy for protecting metal equipment. An excellent scale inhibitor is 1-hydroxy ethylidene-1, 1-diphosphate (etidronic acid) (HEDP), which is usually incorporated into wastewater and discharged directly with the water flow. In this study, HEDP was coated with poly-α-ethyl cyanoacrylate (PEC) by a simple spray method. The corresponding slow-release microcapsules, which we named PEC&HEDP, were successfully prepared. In addition, a correct mass of the microcapsules was added to the spray polyurea elastomer (SPUA) coating. The resulting SPUA/PEC&HEDP 70&30 composite coating exhibited excellent anti-corrosion and scale-inhibiting effects. Electrochemical impedance spectroscopy and salt spray corrosion test were used to assess the corrosion resistance of the coating. The results showed that the barrier performance of the composite coating improved significantly. In addition, the scale inhibition performance of the composite coating was tested in a supersaturated CaCO 3 solution. The results showed that the scale inhibition rate of the composite coating was higher by as much as 80.5% relative to the pure SPUA coating. This work provides a new and simple method for designing and preparing a slow-release microcapsule composite coating intended for scale control.
研究领域:
材料科学
·
腐蚀与防护
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Magnesium and Alloys
·
2022
·
IF 11.813
Shupei Liu,Xinfang Zhang,Chijia Wang,Changqing Yin,Jinsong Rao,Yuxin Zhang,Dusan Losic
Integrating different active substances through carriers and fully exerting their synergistic corrosion inhibition ability is an efficient anticorrosion strategy. Biotemplate (diatomite) was used to integrate polyaniline and sodium phosphate, an active antiseptic filler (PANI/DM/SP) was prepared in this work. Moreover, active fillers were combined with epoxy resins to prepare high-efficiency anti-corrosion coatings for magnesium alloy protection. The stability of the corrosion inhibitor (sodium phosphate) released by the active filler was analyzed by establishing a mathematical model. Simultaneously, electrochemical impedance spectroscopy tests demonstrate excellent corrosion inhibition properties of active fillers and the impedance modulus of composite coatings was three orders of magnitude higher than that of the EP coating, due to the synergistic effect of each component of the active filler. In addition, the mechanical properties of the composite coating were significantly improved, with tests showing a 51.31% increase in rub resistance and two grades of adhesion improvement (ASTM standard). The key of this work was to give full play to the slow-release characteristics of diatomite through scientific methods and promote the synergistic anticorrosion effect of sodium phosphate and polyaniline.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 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）