KEY ENGINEERING MATERIALS
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2016
·
IF 0
Ting Zhang,Li Xing,Jun Hui Xiang,Hua Zheng Sai,Zhen You Li,Rui Fu
Liquid phase deposition (LPD) method was used to prepare corrosion protective titanium dioxide (TiO2) film coatings on the stainless steel mesh which is composed of steel wires at a relatively low temperature (80°C). The as-prepared TiO2 coated samples were characterized using X-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectra (EDX). It was observed that the TiO2 film coatings could conformally coat the stainless steel wires which play a significant role in the corrosion resistance. The corrosion resistance of the samples was evaluated using Tafel polarization curves in a three-electrode electrochemical examination system. The TiO2 deposited samples all showed a certain improvement of corrosion resistance. Compared with the sample prepared in the acid condition (PH=3.7), the low alkaline (PH=9.5) sample could provide better corrosion protection which could increase the corrosion potential (Ecorr) from-0.53 V to-0.17 V.
研究领域:
材料科学
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腐蚀与防护
✓ 已验证
DOI
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Jihong Liang,Umair Azhar,Pengchao Men,Jian Chen,Yining Liu,Jinxuan He,Bing Geng
Flake aluminum powders with excellent corrosive resistance properties are attractive materials in many technological applications. Here, a convenient strategy is employed to encapsulate the aluminum powders by using silicon-fluoropolymer composite film , by which the chemical resistance of aluminum-based pigments is significantly improved. A basic layer of SiO 2 is formed on the surface of the flake aluminum powders via sol-gel process. For the good compatibility between the silicon and fluorine, a uniform and dense layer of poly (trifluoroethyl methacrylate) (PTFEMA) is pasted tightly on the silicon layer initially formed by solution polymerization . Protected by this kind of composite silicon-fluoro-layer, the encapsulated aluminum powders were highly stable when they dipped into strongly alkaline solution (1.25 M, pH > 14). The morphology of composite layers on the aluminum powders are characterized by means of scanning electron microscopy (SEM). The structures of silicon-fluoropolymer composite film are tested by Fourier transform infrared spectroscopy (FTIR), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The relationship between the usage of monomers and cross-linker on corrosion inhibition properties is systematically investigated. The phenomenon of hydrogen gas evolution is eliminated by the PTFEMA/SiO 2 hybrid films owing to an efficient fluorinated protective film on aluminum pigments.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2017
·Vol. 53
·期 5
·3744-3755
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IF 2.599
Xie Zhi-Hui,Shan Shiyao
Self-healing coating based on nanocontainers (NCs) has been emerging as a great strategy to improve the anticorrosion ability of susceptible metal substrate. However, all the research referred to such smart coating to date is focus on organic coating instead of metallic coating. To fill this gap, 2-mercaptobenzothiazole (MBT) loaded porous hollow SiO 2 NCs are synthesized and incorporated successfully into an electroless Ni coating on Mg alloy in this work. The surface morphologies and the loading properties of the NCs are characterized by scanning electron microscopy, transmission electron microscopy, ultraviolet–visible spectrophotometer, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The favorable performance of Ni coating after incorporation of NCs is demonstrated by potentiodynamic polarization (PDP), linear polarization, and electrochemical impedance spectroscopy. Based on the results of PDP test, the corrosion current density ( i
c ) of the MBT@NCs (MNCs)-engineered Ni coating reduces slightly from 6.4 to 5.4 μA cm −2 after immersion in a corrosive media, while the value for MNCs-free coating increases by almost a factor of ten from 6.8 to 67.4 μA cm −2 . Our findings demonstrate the possibility of using corrosion inhibitors loaded NCs to enhance the corrosion resistance of a metallic coating and give new perspectives for functionalization of a metallic coating with nanomaterials.
研究领域:
材料科学
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腐蚀与防护
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Pan Liu,Qin-Hao Zhang,Jian-Qing Zhang,Ji-Ming Hu,Fa-He Cao
A method to quickly prepare highly oriented silicalite-1 zeolite films on different substrates at lower temperature was provided in this work. Compared with the traditional hydrothermal synthesis, rubbing a layer of seed pastes on the pretreated substrate surface in advance and using (NH 4 ) 2 SiF 6 as silicon source for subsequent secondary growth process can effectively reduce the synthesis temperature and shorten the contact time between the substrate and the strong alkaline synthesis solution. The thickness of the zeolite films prepared under three optimal conditions is all around 1 μm and the best contact angle value of 142.5° was achieved for the film prepared at 373 K for 4 h, while this values of the film prepared at 363 K for 6 h and 353 K for 10 h were 97.8° and 41.7°, respectively. The results of SECM showed that the detected localized current value of the film prepared at 353 K for 10 h was similar to that on bare steel after immersion in 0.62 M NaCl solution for 24 h (around 0.4 nA). At the same time, the current value measured under the other two preparation conditions was much higher, suggesting that the corrosion resistance of the film prepared under 353 K was unsatisfactory. In addition, EIS results demonstrated that the corrosion resistance of the films prepared at 363 K for 6 h also decreased significantly after 72 h immersion, while the films prepared at 373 K for 4 h still maintained excellent corrosion resistance and no obvious corrosion products were detected even immersion time up to 720 h. This work provides a new strategy for the application of zeolite in the field of material protection.
研究领域:
材料科学
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腐蚀与防护
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2022
·
IF 6.206
Tong Li,Si-Rui Zhao,Xiao-Xiao Sheng,Yi-Tian Jiang,Liu-Yan Ji,Feng-Rui Wang,Yi-Xiang Chen,Jin-Ku Liu
Molybdenum dioxide has been widely applied in various fields. Constructing novel molybdenum-dioxide-based heterojunction is prospective to expand the applications in metal corrosion protection . Herein, the novel molybdenum dioxide/boron nitride heterojunction composites were synthesized with a two-step calcination method. MoO 2 nanoparticles were in-situ loaded on the surface of BN and formed a heterojunction structure . The total impedance values of MoO 2 /BN-1 (synthesized with melamine and boric acid) and MoO 2 /BN-2 (synthesized with urea, melamine and boric acid) coatings respectively increased to 314.7 % and 163.6 % of that of epoxy coating. It was attributed to synergistic effects consisted of the physical barrier effect, electron transport blocking effect and photo-induced corrosion protection effect. Synthesizing stabilized molybdenum oxide heterojunction with boron nitride carrier exhibited feasibility for practical corrosion protection application.
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
·
2021
·
IF 5.161
Yangyang Duan,You Wu,Ru Yan,Meng Lin,Shengjun Sun,Houyi Ma
A polyelectrolytes coating with self-healing and self-strengthening dual-function was fabricated on the titanium sheet for anticorrosion studies in fluorine-containing artificial saliva. The coating contains a polydopamine bottom film and 2-hydroxypropyltrimethyl ammonium chloride chitosan and sodium alginate multilayers. The incorporated polydopamine bottom film was modified to assure the adhesion of the polyelectrolytes coating on the titanium sheet. Based on the scratch assay, there are two stages for the scratched coating immersed in fluorine-containing artificial saliva: healing and strengthening. Results exhibited that the coating possesses a remarkable self-healing property in the early-stage immersion due to the swollen polyelectrolytes migrating to the scratched region and the calcium cations of the corrosive medium as an ionic crosslinker intercalated in the swollen polyelectrolytes forming calcium alginate and filling the micro-scale scratch. During the later-stage immersion, the self-healing coating showed excellent self-strengthening performance originating from the formation of the more and more compact film with calcium cations intercalated. This research provides an effective strategy to prolong the service life and improve corrosion performance for the implants in the human body environments.
研究领域:
材料科学
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生物医学工程
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Zhou Yang,Jin Zhang,Changfeng Wang,Hanzhong Cui,Li Yang,Huiyan Zhang,Renguo Guan
Graphene has been recognized as reinforcement and/or protective coating for metal materials due to its unique electronic, mechanical properties and chemical inertness . Challenges of graphene agglomeration and weak graphene/metal interfacial bonding still exist during preparation. Here we report a novel method combining capillary-assisted self-assembly with nascent hydrogen reduction technique to one step coat Al foil with layered-stacking graphene. Al foil constructed slit is filled with graphene oxide (GO) suspensions and the generation of nascent hydrogen occurs at the GO/Al interface. The capillary force drives the GO flakes to layer-by-layer assemble on Al foil, as well as increases the reduction depth of GO. X-ray photoelectron spectroscopy (XPS) reveals that the reduced GO (rGO) binds with Al is not just through van der Waals forces, but with a strong interaction of developing C–O–Al bonds. The hydroxyl groups on GO plays an essential role in the formation of such C–O–Al configuration. Al foil coated with rGO through this capillary-assisted self-assembly with nascent hydrogen reduction method show good corrosion resistance compared to the pristine Al and directly drop-casted GO on Al. The proposed method can be readily applied to the fabrication of graphene/metal composites with improved interfaces.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
·
IF 6.6
Changhua Li,Yong Li,Qilong Chen,Dan Sun,Hongjie Li,Wen Chen,Jing Yan,Guiyang Wu,Xi Yuan,Sha Wang,Yi He,Hao Yu
Polyaniline-coated Ti 3 C 2 Tx particles (TPi) endowed the electrophoretic deposited epoxy coating with efficient physical shielding and corrosion inhibition capacities to improve the corrosion protection ability. Ti 3 C 2 Tx of few/single layers was prepared and TPi particles were synthesized by in-situ polymerization of polyaniline on Ti 3 C 2 Tx surface. Characterization results indicated the successful synthesis of TPi material. TPi/epoxy coating was prepared on P110 steel sheet through cathodic electrophoretic deposition method, and the protection ability was tested by electrochemical impedance spectroscopy (EIS) and saline immersion test. EIS results of the complete coating showed that impedance modulus at low frequency (0.01 Hz) of TP7 coating was 3.92 × 10 8 Ω cm 2 after soaking for 20 d, which was higher than 2.82 × 10 6 Ω cm 2 of neat epoxy coating (NEP), indicating better protection performance. The results of impedance spectrum of scratched coating showed that TP7 coating had obvious corrosion inhibition effect, which was attributed to the passivation effect of polyaniline to promote the conversion of loose corrosion products into dense layers. This research provided a new approach to apply Ti 3 C 2 Tx into the electrophoretic deposited epoxy coating with corrosion inhibition effect.
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
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Li Zheng,Song Luo,Sijie Yang
Carbon steel is a widely used metallic material. It is prone to corrosion. In this study, we designed and fabricated a superhydrophobic layer with corrosion resistance for protection of carbon steel substrate. Multiple layers were formed that acted as barriers to protect the substrate from corrosion. This superhydrophobic layer reduced the contact area between the substrate and the corrosive medium owing to the superhydrophobicity. The experimental results showed that a copper layer uniformly covered the carbon steel substrate, and the outer surface of the copper layer was converted into copper oxide , which had a multi-scale structure. The Cu/CuO double layer was modified with stearic acid (SA) to form a Cu/CuO@SA superhydrophobic layer. The superhydrophobic layer exhibited a high water contact angle (up to 160°) and a low sliding angle (<3°). The superhydrophobic layer also exhibited repulsive effect to salt, acidic and alkaline solutions. Atmospheric stability test and UV irradiation test were conducted and the results indicated that the superhydrophobic layer was stable throughout the test period. The corrosion potential of the superhydrophobic sample was −0.18 V and the corrosion current density was 7.72 × 10 −7 A cm −2 , which was one order of magnitude lower than that of the carbon steel substrate. These results indicate that the superhydrophobic sample had a low corrosion tendency and corrosion rate. The polarization resistance and impedance modulus of the superhydrophobic sample were two orders of magnitude higher than the bare steel sample, indicating corrosion resistance and effective protection to the carbon steel substrate.
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
·
2024
·
IF 5.3
Bingzhi Li,Zhihao Zhou,Yinsha Wei,Yizhen Yu,Guosheng Huang,Ri Qiu,Yibo Ouyang
The utilization of Mg Li alloy has garnered significant attention due to its potential for various applications. However, its vulnerability to corrosion remains a challenge that should be overcome for widespread use. In response to this challenge, we present a skin-inspired self-healing coating, applied to micro-arc oxidation (MAO)-treated Mg Li alloy. The coating is composed of epoxy resin, polyvinyl alcohol (PVA) and tannic acid (TA). Like the animal skin, epoxy resin acts as the epidermis, which blocks the invasion of the external corrosive species. Even being damaged by the mechanical effect, the inner PVA and TA polymer connects by hydrogen bonding, which exhibits a swelling effect in aqueous medium to heal the damage area. Even water penetrates into the underneath substrate, TA as the corrosion inhibitor will react with Mg 2+ to form tannate as the inner layer to prohibit further corrosion. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy and atomic force microscopy are utilized to characterize the microstructure, chemical composition and topology of the coating. Corrosion protection experiments demonstrate that the MAO-PVA/TA-epoxy coating exhibits high anti-corrosion ability compared to MAO-PVA/TA and MAO coating. The |Z| 0.01Hz value of 1.13 × 10 9 Ω cm 2 is two and six orders of magnitude higher than the other two coatings. An in-depth comprehension of the self-healing process is achieved through ex situ examination utilizing SEM and energy-dispersive spectroscopy techniques. For real-time observation of the self-healing process of the coating, we employ a scanning vibrating electrode technique and a three-dimensional digital microscope. The reported coating, endowed with self-healing capabilities, holds tremendous promise for expanding the scope of applications for Mg Li alloy in the realm of science and engineering.
研究领域:
材料科学
·
腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Li Jiang,Meng Xu,Mianyu Bao,Yanmao Dong,Yan Yuan,Xing Zhou,Xiangkang Meng
The harsh acidic environment containing chloride ions has created serious corrosion hazards for ferritic stainless steels . Zeolitic imidazole frameworks (ZIFs) are a promising material for corrosion protection due to their microstructural and physicochemical properties. In this study, we proposed the electrodeposited ZIF-67 reinforced polypyrrole (PPY) coating (PPY/ZIF-67) for corrosion protection of 430 ferritic stainless steel (430SS). The morphology, microstructure, and anticorrosion behavior of the pristine PPY and hybrid PPY/ZIF-67 coating systems were characterized. The successful electrodeposition of ZIF-67 nanoparticles on the surface of the PPY layer resulted in a uniform distribution and a compact coating structure, which contributed to the overall uniformity of the coating and enhanced both the barrier and activity inhibition functions of the coating. The protective performance of PPY/ZIF-67 coatings was evaluated through electrochemical tests, the results indicated that the anticorrosion efficiency of PPY/ZIF-67 coating (with 0.4 mol/L pyrrole monomer content) reached to 99 %, and the coating demonstrated a durable corrosion protection ability (744 h) in 0.1 mol/L HCl solution. Such performance of can be attributed to the combined effect of the anodic protection provided by the inner PPY film, the active corrosion inhibiting properties of the ZIF-67 nanoparticle layer, and the hindrance of aggressive species by the compact coating structure over the prolonged service time.
研究领域:
材料科学
·
电化学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xiandie Zhang,Linfeng Yue,Heng Xu,Haozhe Li,Jiaming Liu,Xiang Zhou,Xiaode Guo
The study employed a two-step synthesis method to prepare Al@PFHP@fluoropolymer energetic composites with a core–shell structure. PFHP and HF acid are used for surface etching and modification of raw Al powder. PFHP bonds to the surface of Al powder, with redundant C-F providing hydrogen bonding sites, driving dissolved PVDF and P(VDF-HFP) polymer chains in the liquid phase to migrate, nucleate, and grow on the surface of the Al powder, and consequently the formation of a continuous shell layer through hydrogen-bonding self-assembly. The Al powder coated with fluoropolymer exhibited strong hydrophobic and corrosion-resistant properties, ensuring long-term storage and environmental adaptability. Compared to mechanically mixed Al@PFHP/fluoropolymer, the Al@PFHP@fluoropolymer composites show significant improvements in thermal reactivity, ignition, and combustion performance. The close integration of fluoropolymer and Al shortens the mass and heat transfer distances during the reaction process. Additionally, the low-boiling-point AlF 3 does not hinder diffusion process in the combustion zone, which is conducive to the alleviation of the reaction sintering phenomenon and the rapid and concentrated release of energy. Therefore, through the dual strategy of using fluorine-containing oxidizers and structure optimization, efficient reaction of Al@PFHP@fluoropolymer is achieved, also promoting efficient combustion of Al powder. The synthesis process of this energetic composite is simple yet yields exceptionally high performance, enabling large-scale production and application potential in military ammunition and rocket propulsion systems.
研究领域:
材料科学
·
能源与推进
✓ 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）