CORROSION
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2022
·Vol. 78
·期 12
·1190-1202
·
IF 2.094
Xu Yangshuhan,Chen Feng,Wang Shufen,Li Minghua
In this work, ordinary epoxy coatings were modified by hydrophobic nanoSiO 2 and hydroxyl PDMS to construct ultrahydrophobic epoxy coatings for corrosion protection and self-cleaning of phosphatized Q235 carbon steel. Ordinary epoxy polymer coating was fabricated via polyaddition reaction between E44 (bisphenol A epoxy resin oligomer) and DDM (4,4-diaminodiphenyl methane). The microscopic morphologies of coatings showed that many SiO 2 nanoparticles were presented on the surface of ultrahydrophobic epoxy coating. Through static water contact angle measurement, the modified epoxy coating displayed ultrahydrophobicity with a water contact angle of approximately 150°. However, adding too much nanoSiO 2 caused cracks on the modified epoxy coating, which deteriorated the corrosion resistance of the coating. According to the corrosion test results, the modified coating added with 6.7 wt% hydrophobic nanoSiO 2 and chemically modified with hydroxyl PDMS showed the best corrosion protection performance, which was reflected by the high impedance of approximately 10 9 Ω·cm 2 after 50 d immersion in 3.5 wt% NaCl (aq.). Besides, the coating also presented good self-cleaning performance. The coating extracted from the slurry still remained clean without any contamination.
研究领域:
材料科学
·
表面工程
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DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 5
·e202405511
·
IF 2
Lu Shen,Yingxuan Wang,Miaomiao Lu,Chengbo Ni,Pengfei Zhou,Liping Zhao
Graphical Silk fibroin modified CF (CF–SF) was acted as a reinforced additive to enhance the corrosion resistance and anti-erosion properties via improving the interfacial adhesion between CFs and resin matrix. The exceptional protective coating can extend the service life of the equipment in a severe marine environment. Carbon fibers (CFs), characterized by high tensile strength, elastic modulus, and excellent chemical resistance, serve as an appropriate filler for coating reinforcement. However, the inadequate fiber/matrix interfacial adhesion makes it difficult to prepare high performance CF-reinforced composites. Therefore, we synthesized a kind of silk fibroin modified CF (CF─SF) as a reinforced-additive for strengthening the corrosion resistance and anti-erosion properties via improving the interfacial adhesion between CFs and resin matrix. The impedance value of composite coating including 1 wt% CF—SF (CF—SF/EP) was 1.65 × 108 Ωˑcm 2 after immersion, which was two orders of magnitude greater than that of the pure EP coating. In addition, the erosion experiments results showed that the volume loss of EP/CF—SF coating was 132.6 mm 3 , which decreased by 36.4% and 17.4% compared with EP/CF and EP/CF─O, respectively. The average depth of the CF—SF/EP coating (0.27 mm) was the shallowest among the coatings. Ultimately, we examined the protective mechanism of the CF–SF/EP coating.
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
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2024
·
IF 2.5
Cansen Liu,Qingmei Chen,Canhai Cai,Jianyu Xu
Developing ecofriendly anticorrosion coating has great demand for marine protection. Incorporation of nontoxic inorganic fillers into waterborne epoxy (WEP) coating shows tremendous potential for enhancing corrosion resistance. However, the application of MXene/WEP coating is limited by the poor dispersion of MXene in WEP and insufficient corrosion resistance. Herein, a polydopamine (PDA) modified MXene-CeO 2 @PDA (MCP) filler is constructed by a combination of CeO 2 with MXene and embedded into WEP to form ecofriendly anticorrosion MCP/WEP coating. Dispersion of MXene in WEP is improved by the introduction of CeO 2 and PDA modification. Benefiting from the synergy of the physical labyrinth effect of MXene and the chemical inhibition effect of CeO 2 , MCP/WEP coating exhibits remarkable anticorrosion behavior in 3.5 wt% NaCl solution with a low corrosion rate (CR) of 4.48 × 10 −6 mpy, which is three orders of magnitude lower than that of blank WEP (4.78 × 10 −3 mpy). Moreover, MCP/WEP presents long-term and stable corrosion protection for over 30 days. The results reveal the incorporation of MCP significantly promotes the anticorrosion performance of WEP.
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
PROGRESS IN ORGANIC COATINGS
·
2016
·
IF 2.632
Jiamei Chen,Liang Fang,Zhongzi Xu,Chunhua Lu
Light responsive self-healing capability offers polymer coatings the opportunity to heal surface scratches in a localized, non-contact, and remote manner. A near-infrared (NIR) light (808 nm) responsive self-healing coating is reported here, using epoxy and carbon black as coating matrix and photothermal filler, respectively. The chemical structure and property of the prepared epoxy coatings are tailored by changing the ratio of m -xylylenediamine as diamine and 3,5-bis(trifluoromethyl) benzylamine as monoamine. Carbon black is subsequently incorporated into the coating with the optimized thermally induced self-healing ability to achieve good photothermal effect, correspondingly transferring the thermally triggered healing to the light responsive repairing. The results indicate that with the gradual replacement of diamine with monoamine, the epoxy network having lower crosslink density and glass transition temperature ( T g ) is achieved, offering sufficient chain mobility for thermally induced healing. A small amount of CB (up to 1.0 phr) provides the coating good photothermal effect under NIR light. Upon exposed to NIR light of 1.2 W cm −2 for only 3 min, efficient healing is achieved. The recovery of the filler distribution on the healed region and the restoration of the anti-corrosion property are finally demonstrated. The combination of photothermal filler into tailored epoxy network via changing the ratio of diamine and monoamine provides a convenient approach to heal scratches of coatings via NIR light.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 47
·e53193
·
IF 3.057
Xiuzhou Lin,Qiang Peng,Song Duan,Chunjiang Zhang,Xulei Chen,Zhiqiang Deng,Baojie Dou,Yingjun Zhang,Xiulei Gao,Zhiwen Fang
In this study, ZIF-8 modified fluorinated graphene composite (FG@ZIF-8) was innovatively prepared and used as a novel functional filler to improve the anticorrosion performance of epoxy coating on Q235 carbon steel. The morphology and structure of FG@ZIF-8 composites were characterized by scanning electron microscopy (SEM), x-ray powder diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), and x-ray photoelectron spectroscopy (XPS) tests. The results showed that the structure and morphology of the composites largely depended on the composition ratio of FG and ZIF-8. The mechanical properties and corrosion resistance of FG@ZIF-8 modified coatings were also investigated. The unique two-dimensional sheet structure and insulation of FG in the FG@ZIF-8 filler can not only inhibit the penetration of corrosive media but also discourage electron migration effectively on the interface of coating/matrix during the electrochemical reaction. Meanwhile, the chemical cross-linking between the amine groups in ZIF-8 and the epoxy group increases the degree of densification of the coatings. Besides, the 2-methylimidazole from the dissolution of ZIF-8 on FG@ZIF-8 will also inhibit the corrosion reaction. These advantages endow the FG@ZIF-8 modified epoxy coatings an excellent long-term corrosion resistance. Our findings may inspire the development of new graphene-based materials with superior protective properties for metallic 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
Journal of Coatings Technology and Research
·
2024
·
IF 2.3
Shen Zihan,Yang Hongyi,Zhang Pengjie,Cui Jiewu,Wang Dongmei,Shen Wangqiang,Xu Guangqing,Lv Jun
Solving the problems of interfacial compatibility and dispersibility between filler and epoxy resin (EP) can greatly improve the anticorrosion performances of epoxy coatings and expand their application field. In this work, carbon nanotubes (CNTs) were modified by poly(sodium 4-styrene sulfonate) and poly(3,4-ethylenedioxythiophene) to form PCNTs hybrids, and the cathodic electrophoretic deposition method was used to form composite epoxy coatings on the surface of sintered NdFeB magnets for enhancing the anticorrosion performance. The corrosion resistance of PCNTs was evaluated by electrochemical and static immersion corrosion tests. Results indicate that PCNTs hybrids possess better distribution and compatibility in epoxy resin than CNTs hybrids, resulting in the anticorrosion performances of higher density of composite epoxy coatings on NdFeB magnets. Optimized EP/PCNTs possess a much higher \(\left| Z \right|\) 0.01 Hz of 4.41 × 10 7 Ω·cm 2 and a much lower J corr of 9.648 × 10 − 10 A·cm − 2 than that of EP (1.34 × 10 4 Ω·cm 2 and J corr 4.436 × 10 − 6 A·cm − 2 ), demonstrating superior corrosion resistance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Siyu Liu,Chuanpeng Li,Yuchen Sun,Xuanlin Qiu,Xiaoli Li,Chufeng Sun,Yu Liu,Qiangliang Yu,Bo Yu,Meirong Cai,Feng Zhou,Weimin Liu
MXene has excellent anticorrosion and self-lubricating properties. It is widely used in the field of anticorrosion and wear resistance. However, there is a strong interaction between MXene nanosheets, which makes it easy for them to agglomerate in the coating and affects the mechanical properties of the coating. Thus, the application of MXene is limited. In this study, MXene is modified by 2,5-diaminobenzenesulfonic acid, which can reduce the aggregation of MXene in the coating. MXene is functionalized by using tetrabutylphosphorus hydroxide benzotriazole lignin composite material (BTA-P4444-Lig) with environmental protection, anticorrosion, and lubricating properties. The prepared MXene has excellent anticorrosion and lubrication properties. Functionalized MXene (f-MXene-P) is used as a filler for environmentally friendly waterborne epoxy (WEP) coatings. Electrochemical tests show that the impedance of f-MXene-P/WEP (3.91 × 107 Ω·cm2) is an order of magnitude higher than that of WEP (1.89 × 106 Ω·cm2). The maze effect of MXene and the protective film formed by BTA-P4444-Lig on the surface of Q235 steel synergistically enhance the anticorrosion performance of f-MXene-P/WEP. The friction test results show that the friction coefficient of f-MXene-P/WEP (0.068) is much lower than that of WEP (0.612). The synergistic effect of MXene and BTA-P4444-Lig with lubricating properties improves the wear resistance of f-MXene-P/WEP.
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
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yuan Ma,Tong Li,Si-Rui Zhao,Zhou-Tao Feng,Jin-Ku Liu
This study enhanced the corrosion protection of zinc molybdate (ZnMoO4) in epoxy coatings by integrating ZIF-8 to form a Z-type nano heterojunction. The heterojunction leveraged the light absorption properties of organic ligands within ZIF-8 to significantly promote the excitation and separation efficiency of photogenerated carriers, thereby enhancing the photocathodic protection capability of the coating. It also utilized a cocrosslinking curing process between the epoxy functional groups and the organic functional groups of ZIF-8, resulting in a notable improvement in coating density. Furthermore, the metal–organic framework (MOF) effectively anchored the coating, preventing the recurrence of defects due to molybdate dissolution, thus enhancing durability. In synergy with the molybdate passivation film, it effectively hindered the corrosive attack of ions adsorbed on the metal substrate surface, thereby contributing to the suppression of chemical corrosion. Meanwhile, the compositing of MOF significantly enhanced the hydrophobicity of the material. Experimental data demonstrated that the impedance of the ZIF-8/ZnMoO4 composite coating achieved a remarkable increase to 226.0 and 208.3% compared to pure epoxy and ZnMoO4 coatings, which provided insights into expanding the compatibility and synergistic protective performance of molybdate-based corrosion-resistant materials by constructing heterojunctions between organic and inorganic materials.
研究领域:
材料科学
·
腐蚀防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Mingjun Cui,Jianda Dong,Kaihe Zhou,Yunhui Fang,Jibin Pu,Haichao Zhao,Yonggang Wang,Liping Wang
In present study, phenosafranin (PSF) was employed to achieve the dispersion of graphene in water owing to the presence of π-π interaction which was also confirmed from the absorption free energy calculated by first principles based on density functional theory. In addition, water-borne epoxy (WEP) coatings containing graphene, PSF and PSF@G were prepared and fabricated on the electrodes. Meanwhile, the corrosion protection performance of different coatings during the immersion in 3.5 wt% NaCl solution was investigated and compared. It could be concluded from the results that PSF@G/WEP coating presented better protective performance than other coatings since the well dispersed graphene in WEP provided superior impermeability to corrosive medium. Besides, the PSF surfactant used to disperse graphene was also beneficial to improve the protective performance of the WEP coating.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Li Cheng,Chengbao Liu,Hao Wu,Haichao Zhao,Feixiong Mao,Liping Wang
Dopamine (DA), one type of mussel-inspired biological molecules with adhesive nature and corrosion inhibitor property, are often used to functionalize the surfaces of various materials. Herein, we report the application of polydopamine (PDA) microcapsules as novel nanocontainers for the purpose, loading corrosion inhibitor (benzotriazole) in its shell structure, and then were embedded into epoxy coatings to provide self-healing and anti-corrosion protection for carbon steel. Fast release of benzotriazole in acidic environment caused by local corrosion and the chelating effect of PDA-Fe 3+ can synergistically promote the formation of protective film on bare steel surface, which endows coatings with self-healing functionality. Electrochemical impedance spectroscopy (EIS), local electrochemical impedance spectroscopy (LEIS), and spray tests were conducted to evaluate the active inhibition and corrosion resistance of the loaded coatings. The scratched coating with incorporation of nanocontainers presented better protection performance, exhibiting increased R o (oxide layer resistance) and R ct (charge transfer resistance) during initial immersion periods. The EIS tests in long-term immersion were also performed to confirm the anti-corrosion effect of composited coatings. These results demonstrated that benzotriazole-decorated PDA capsules dramatically enhanced the self-healing properties and anti-corrosion performance of epoxy coatings with the synergistic help of PDA and benzotriazole.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Song Duan,Baojie Dou,Xiuzhou Lin,Shixiong Zhao,Wilfred Emori,Jilin Pan,Hao Hu,Hang Xiao
In this study, uniform sized ZIF-8 was synthesized by microemulsion method, and a series of ZIF-8 modified epoxy coatings with different mass fractions were successfully prepared. EIS analysis revealed the improved anti-corrosion performance of the modified epoxy coating with increasing mass fraction of ZIF-8 fillers, and this was confirmed by the results of the salt spray and adhesion tests . In addition, the tensile strength and friction properties of the epoxy coating have also been greatly improved. These phenomena were explained by the chemical cross-linking between ZIF-8 fillers and epoxy. The chemical cross-linking increased both the cross-linking density and the barrier performance of the epoxy coating, consequently improving its anti-corrosion and mechanical properties.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2020
·
IF 6.479
Cheng Li,Yuan Li,Xiao Wang,Sicheng Yuan,Dan Lin,Yanji Zhu,Huaiyuan Wang
It is difficult for ordinary coatings to meet the long-term anti-corrosion requirements of modern industry. Incorporating high-performance fillers into those coatings is considered as an effective way to solve the problem. Herein, a new hydrophobic fluoro-substituted polyaniline (PFAN) filler with high-performance was successfully synthesized. Results showed that the filler synthesized at 0 ℃ exhibited nearly two-dimensional micro-fibrous morphology and good solubility in some common solvents. Results also revealed that the fabricated filler could passivate iron and prevent electrolyte penetration. All these advantages endowed the epoxy coating containing 3 wt% PFAN with exceptional long-term anti-corrosion performance.
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）