Surfaces and Interfaces
·
2021
·
IF 4.837
You Wu,Ru Yan,Yangyang Duan,Juan Qiu,Ting Chen,Houyi Ma
Because traditional chromating and phosphating processes are harmful to the environment and human health, an eco-friendly tannic acid (TA)-based conversion film technology is established by adopting a new self-assembly strategy of TA/metal complexes on iron surfaces in aqueous solutions. In this study, TA and TA/Zn films were conveniently fabricated by anchoring a certain amount of TA molecules on the iron surface through the coordination interaction between phenolic hydroxyls and metal ions . In contrast, the introduction of Zn ions in the film-forming process cannot only complex with more TA molecules to form a thicker conversion film but also accelerate the film-forming process and transform into ZnO, which can further inhibit iron corrosion. This combination leads to the excellent corrosion protection of TA/Zn film-modified iron (the corrosion protection efficiency is up to 92.39%). Moreover, impact tests show that the TA/Zn film can enhance the adhesion between the iron substrate and outer coating.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 12
·1998
·
IF 3.164
Yang Ding,Jiang Zhong,Ping Xie,Jinchuang Rong,Huifang Zhu,Wenbin Zheng,Jinglan Wang,Fei Gao,Liang Shen,Haifeng He,Ziqiang Cheng
Polypyrrole nanowires/graphene (PPyNG) nanocomposites as anticorrosive fillers were prepared by in situ polymerization in order to improve the anticorrosion performance of waterborne epoxy coatings. Field emission scanning electron microscope (FESEM) and Fourier transform infrared spectroscopy (FTIR) characterized the morphologies and structures of the synthesized PPyNG. The polypyrrole nanowires with about 50 nm in diameter were obtained. Conjugation length of PPy was increased with the addition of graphene. Open circuit potential (OCP) measurements, Tafel polarization curves, and electrochemical impedance spectroscopy (EIS) using an electrochemical workstation evaluated the anticorrosion properties of the waterborne epoxy/PPyNG coatings (EPPyNG). The studied nanocomposite coating possessed superior corrosion protection performance when the graphene content of the filler was 2 wt %. Its corrosion rate was about 100 times lower than that of neat epoxy coating. The higher barrier properties of nanocomposite coating and passivation effect of polypyrrole nanowires were beneficial in corrosion protection.Keywords:polypyrrole nanowires;graphene;waterborne epoxy;corrosion protection
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Ke Liang,Zhengsheng Yang,Zhiheng Zou,Linbo Zhang,Haipeng Lu,Guang Yang,Longjiang Deng
The electromagnetic wave active carbonyl iron (CI) particles were susceptible to environmental damage leading to functionality loss. Polymeric network as surface coating layer of CI appeared to be useful for improving their anti-corrosion ability. It is also expected that the coating could bridge the particles and the polymer matrix when CI was applied in polymer composites so that the integrity can be promoted. In the present work, disulfide bond [-S-S-] and 2-ureido-4-pyrimidinone (UPy) containing monomers were adopted for formation of crosslinked protection layer (named EAU layer) of CI. The EAU layer significantly enhanced the electrochemical corrosion resistance of CI based on the results of impedance modulus (0.01 Hz), potentiodynamic polarization test, and long term (200 cycles) cyclic voltammetry test. The CI-EAU could also retain good microwave absorbing ability. It is also found that when CI-EAU was embedded in synthesized polyurethane with dynamic [-S-S-] bond and UPy moieties. The composite could achieve fast self-healing under laser irradiation in the presence of Mxene. Besides, the composite was recyclable and could move the cargo under magnetic field. This well-designed strategy holds great promise not only for effective corrosion protection of electromagnetic functional particles, but also for realization of stable and self-healable electromagnetic composites.
研究领域:
材料科学
·
化学工程
·
电磁学
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产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Huagao Wang,Hesong Ren,Changfei Jing,Jinzhe Li,Qiang Zhou,Fanbin Meng
Conventional electromagnetic wave (EMW) absorbing materials can exhibit excellent microwave absorption property . However, their susceptibility to corrosion and high density restrict them used in the harsh marine environments with high humidity conditions. Here, we report graphene oxide@camphorsulfonic acid-doped polyaniline (GO@CSA-PANi) nanocomposites prepared by an in-situ polymerization approach as promising materials for application in both EMW absorption and corrosion protection . Impressively, when applied as EMW absorbers, the as-obtained GO@CSA-PANi nanocomposites show excellent EMW absorbing capacity with broad bandwidth due to the remarkable impedance matching and EMW attenuation characteristics caused by the introduction of chiral CSA-PANi. The reflection loss (RL) and effective bandwidth of the GO@CSA-PANi can reach −48.1 dB and 5.3 GHz with a 2.4 mm matching thickness, respectively. Furthermore, owing to the synergistic effects of GO and CSA-PANi, the water borne epoxy composite coatings with GO@CSA-PANi nanocomposites exhibit long term corrosion resistance . The as-obtained composite coatings at optimized content exhibit a remarkable corrosion protection capability (97.43%) after 168 h of immersion in corrosive medium. The bifunctional nanocomposites could open new avenues towards high-performance electromagnetic wave absorption with corrosion protection.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
CORROSION SCIENCE
·
2018
·
IF 4.862
Liangliang Xiong,Jianhua Liu,Mei Yu,Songmei Li
A two-dimensional nanocomposite, salicylaldehyde@ZIF-8/GO (SZG), was synthesized by anchoring the ZIF-8 nanoparticles containing the inhibitor salicylaldehyde (SA) on GO nanosheets for corrosion protection of AA2024 aluminum alloy. Its stimuli-responsive release of SA under acid and Al 3+ cations conditions was proved by UV–vis. Electrochemical impedance spectroscopy demonstrated that SZG nanocomposites prominently improved the protection properties of PVB coating by enhanced passive and active protection compared with the controlled samples. The enhanced passive protection derived from the two-dimensional structure of SZG, while inhibitor SA acted the active protection. Quantum chemical calculation clearly clarified the release and inhibition mechanisms of SA.
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Jinxu Song,Wenqing Liu,Jiangwen Xu,Haotian Li,Yinquan Zhang,Chunxia Lin,Hongyi Li,Jinshu Wang
In aqueous environments, constructing hydrophobic interfaces represents one strategy for corrosion protection. Such interfaces reduce corrosion rates by isolating aqueous solutions from contact through low-surface-energy interface design. However, current hydrophobic interfaces rely on low-surface-energy modifications, facing failure due to insufficient coating adhesion. This study employs a composite coating formed by in-situ grown TiO2 nanotube arrays and stearic acid, investigating the corrosion protection capability and failure mechanisms of this composite structure. Simultaneously, under identical stearic acid loading conditions, the TiO2 nanotube array-stearic acid composite coating demonstrates superior corrosion protection compared to pure titanium surfaces loaded with stearic acid. SVET results indicate that the active corrosion centers of TiO2 nanotubes are located internally. An innovative ohmic circuit model is proposed to explain the mechanism behind the beyond additive effect. The results demonstrate that the TiO2 nanotube-stearic acid composite coating synergistically enhances corrosion protection through stearic acid filling within the TiO2 nanotube array. This work confirms the application potential of filling TiO2 nanotube arrays with hydrophobic agents for corrosion-protective coatings and provides insights for designing coating interfaces with ordered array structures.
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产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 64
·期 2
·779-787
·
IF 3.2
Xiang Zhang,Zhenggang Xiao
Organic anticorrosion coatings (OACs) are the most effective, economical, and environmentally friendly protection strategy for metals. However, the traditional OACs usually inevitably suffer mechanical cracks during their service life. If not repaired in time, the resultant cracks in OACs will result in irreparable corrosion of the metal substrate. More detrimentally, these microcracks are not easily detectable at the initial stage. If OACs can autonomously heal their damage at the initial stage, the microcracks will be repaired in time and the metal substrate will be protected well. Thus, giving OACs the self-healing capability is a promising strategy for metal protection. Herein, an autonomously self-healing TiO 2 -reinforced silicone polyurea (SPU- g -TiO 2 ) elastomer was successfully designed as anticorrosion coating for Q235 carbon steel (QCS) protection. The SPU- g -TiO 2 elastomer matrix exhibited excellent stretchability with a maximum strain of 3826.72% and fast self-healing ability with an outstanding self-healing efficiency of 98.69% for 6 h without any external stimulus at room temperature. The QCS coated with SPU- g -TiO 2 showed excellent damage resistance and good anticorrosive ability, and it can self-heal the microcracks generated in its coating in time to prevent corrosive media corroding the internal mental substrate. This work has a positive guiding significance for the development of functional OACs to improve their protection for metallic materials. Highlights A bionic smart self-healing SPU- g -TiO 2 coating was successfully synthesized. The mechanical and self-healing properties are balanced using nanoparticles. The coating features excellent self-healing capability and stretchability. Q235 steel coated with SPU- g -TiO 2 shows good anticorrosive ability.
研究领域:
材料科学
·
腐蚀工程
·
聚合物化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Fengying Li,Yanjun Ma,Lei Chen,Hongxuan Li,Huidi Zhou,Jianmin Chen
Aniline oligomer-functionalized graphene oxide (AOFG) and reduced graphene oxide (AOFrG) were prepared via a liquid-phase chemical modification route and incorporated into the polyurethane (PU) by an in-situ polymerization to obtain both wear-resistant and anticorrosive composite coatings. GO/PU and rGO/PU composite coatings were prepared in the same manners and used for comparative studies. Results indicate that the functional modification improves the dispersion of GO and rGO in organic solvents significantly. As a result, the introduction of AOFG and AOFrG into the PU enhance the mechanical and thermal properties of PU prominently, a reinforcement in the friction durability, lubrication and anticorrosive performance ensued correspondingly, and the enhancement efficient was more much stronger than those of the raw GO and rGO. Furthermore, all properties of AOFG/PU composite coating are marginally superior to those of AOFrG/PU composite coating. The analysis results indicate that AOFG shows the most outstanding enhancement effect mainly due to its excellent dispersion homogeneity and interaction led by higher reactivity with the matrix, along with improved permeability resistance and proton erosion endurance.
研究领域:
材料科学
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化学工程
·
腐蚀科学
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产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 2
·775
·
IF 3.4
Kai Wei,Xuejie Zhao,Zhe Zhang,Yujie Yuan,Wenquan Kong,You Zhang
In this study, a duplex coating system (LDH-V/SG-Ce) of vanadate-intercalated layered double hydroxide (LDH) and Ce-doped sol–gel (SG) layers was developed for the purpose of active corrosion protection of the aluminum alloy AA2024. ZnAl-LDH film was grown in situ on the surface of an aluminum alloy using a hydrothermal method and intercalated with V2O74−anions as corrosion inhibitors, and sealed with a Ce (III)-doped silane coating using a sol–gel technique. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analyses were used to analyze the microstructure, surface functional groups and structure of the LDH-V/SG-Ce film. The uniform and compact silane layer was covered both in the pores and on top of the LDH film. The results of glow discharge optical emission spectroscopy (GDOES) indicated that V2O74−and Ce (III) ions were loaded in the LDH layer and silane film, respectively. The potentiodynamic polarization results showed that the corrosion current density of the bilayer system in the presence of corrosion inhibitors was reduced to 1.92 × 10−8A/cm2. Electrochemical impedance spectroscopy (EIS) results showed that the LDH-V/SG-Ce duplex coating could provide effective protection for the aluminum alloy after being exposed to a corrosive solution for 14 days.Keywords:layered double hydroxide;silane;films;inhibitor;corrosion resistance;aluminum alloy
研究领域:
材料科学
·
腐蚀工程
·
表面工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2021
·
IF 6.064
Manyi Huang,Guangming Lu,Jibin Pu,Yujie Qiang
Layered double hydroxides (LDHs) have been widely used as “smart” containers in the field of metal corrosion protection, and have broad industrial prospects. It is environmentally friendly and feasible to use aliphatic carboxylates and corresponding acids as substitutes for harmful corrosion inhibitors. However, previous studies rarely involved comparing the anti-corrosion mechanisms of different aliphatic acids modified on the LDH surface, and the durability of the prepared coatings also needs to be improved. In this work, MgAl-LDH laminates were grown in situ on AZ31 substrates by a hydrothermal method, and then modified by sodium laurate (SL) and sodium dodecylbenzene sulfonate (SDBS). Due to the physical barrier effect of the LDH layers, the spatial repulsion effect of the air film and the ion exchange reactions in the interlayer galleries, the functional coatings prepared exhibit smart and superior anti-corrosion performance on the magnesium substrates in 3.5 wt.% NaCl solution. Compared with LDH-SDBS-8 coating, the obtained superhydrophobic LDH-SL-8 coating shows more excellent long-term corrosion protection owing to the stronger intercalation capacity.
研究领域:
材料科学
·
腐蚀工程
·
表面化学
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DOI
高影响因子
Industrial Chemistry & Materials
·
2025
·
IF 11.9
Di Bao,Junqi Ning,Dan Lin,Sicheng Yuan,Jianwen Peng,Yue Sun,Huaiyuan Wang,Yanji Zhu,Ruitao Wang
Addressing the limitations of conventional organic polymer coatings in thermal management, this study developed an eco-friendly micro-3D expanded graphite powder (MEGP) protection coating that integrates exceptional heat conduction and heat radiation. In terms of thermal conductive filler selection, expanded graphite (EG) with a micro 3D structure was selected as the filler framework of the composite coating, and a self-assembled functional filler (MEG) was obtained after modification with an as-prepared corrosion inhibitor of a Schiff base–Ce complex (SP), which formed a 3D conductive network in the coating by electrostatic self-assembly. The unique architecture endowed MEGP with a remarkable thermal conductivity of 2.6 W m−1 K−1, 12-fold higher than that of pure epoxy (common resin for anti-corrosion coatings) and high infrared emissivity (0.95–0.98 at the full spectrum range of 2.5–25 μm), synergistically enhancing heat dissipation through dual conduction and radiation mechanisms. Finite element simulations confirmed superior thermal management performance. Simultaneously, the MEGP coating exhibited robust adhesion (10.4 MPa) and impact resistance (100 cm). Moreover, the impedance modulus of the coating at 0.01 Hz remains above 108 Ohm cm2 during 90 d immersion in a 3.5 wt% NaCl solution, benefiting from the Schiff base–Ce complex. The structure–property relationships between the 3D network architecture and multifunctional performance were elucidated by a systematic study. This novel design provides a new method for preparing functional integrated coatings with high thermal conductivity.
研究领域:
材料科学
·
热管理
·
涂层技术
·
纳米复合材料
·
腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Junnan Chen,Jinhua Feng,Chengpeng Liang,Li Sun,Zhifeng Lin,Weihua Li,Ming Xue
Searching for nanofillers that have prominent barrier performance, good compatibility with polymer matrix and little chance of triggering galvanic corrosion remains a challenge in organic coating industries. In this study, ZIF nanosheets (ZIF-NS) were readily fabricated at room temperature and then used as additives in epoxy matrix for anticorrosion purpose. EIS demonstrated that epoxy doping with 0.5 wt% ZIF-NS possessed a resistance modulus at 0.01 Hz of 2.88 × 10 9 Ω·cm 2 after immersion for 20 days, which was 2 orders of magnitude higher than that of neat epoxy. Owing to the restrained propagation of coating defects, as well as the tortuous diffusion channels for aggressive ions, ZIF nanosheets have showed great potential to form epoxy-based composite coatings on a large scale, and might pave the way for applications of other two-dimensional MOFs in industries.
研究领域:
材料科学
·
腐蚀工程
·
表面涂层
✓ 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）