Journal of the Taiwan Institute of Chemical Engineers
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2019
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IF 3.834
Zhenlan Qin,Yanwei Zeng,Qianhui Hua,Qunjie Xu,Xixun Shen,Yulin Min
The preparation of the composite films on aluminum alloy 5052 (AA 5052) by the simple brush coating method in order to improve the corrosion resistance of aluminum alloy is the urgent need. However, some preparation methods, such as chemical vapor deposition, heat treatment, are relatively high cost and their preparation condition is very rigorous. In this paper, boron nitride and silane for boron nitride (h-BN)-dodecyl trimethoxysilane (DTMS)- (3-Aminopropyl) triethoxysilane (APTES) are used to improve corrosion resistance of AA 5052 with a simple and low-cost method. The corrosion resistance of the film has been characterized by electrochemical test in the 0.5 M H 2 SO 4 + 2 ppm HF acid solution. The results show that the protection efficiency of the h-BN-DTMS-APTES composite film reaches 99.97%, which greatly improves the corrosion resistance of the aluminum alloy 5052. When the sample is immersed into a 0.5 M H 2 SO 4 + 2 ppm HF aqueous solution for 120 h, the protection efficiency of the h-BN-DTMS-APTES composite film reaches 96.49% with good stability.
研究领域:
材料科学
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表面工程
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腐蚀与防护
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纳米复合材料
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DOI
高影响因子
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
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2019
·Vol. 70
·期 6
·1044-1055
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IF 1.458
Junwei Sheng,Xixun Shen,Yaxue Wang,Qunjie Xu,Xiaoxue Zhang
In this paper, the pure Zn coating and Zn-TiN composite coatings containing four different concentrations of TiN particles were prepared on the carbon steel by direct current electrodeposition. The X-ray diffraction and scanning electron microscopy were used to study the crystal size, preferred orientation, and surface morphology of these coatings. The results show that the incorporation of TiN particles refines the crystal size of the Zn coating and results in the formation of a special surface morphology with papillary-shaped clusters structure that preferentially grows along the (100) crystallographic plane. Such a surface provides better hydrophobicity for the Zn-TiN composite coatings. The corrosion behavior of these coatings was evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy and the long-term immersion test. The results show that the incorporation of TiN nanoparticles leads to a significant increase in corrosion resistance of the Zn coating and there is an optimal addition of TiN nanoparticles to provide a best corrosion resistance for the composite coatings. Additionally, the microhardness of prepared coatings was also evaluated.
研究领域:
材料科学
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表面工程
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腐蚀与防护
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金属功能涂层
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电化学
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DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2019
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IF 3.192
Lu Zhu,Yousen Zhu,Xuanru Ren,Ping Zhang,Jianghao Qiao,Peizhong Feng
MoSi 2 -MoB-ZrO 2 composite powders are one-step synthesized prepared by self-propagating high-temperature synthesis (SHS), which are further utilized to prepare the oxidation protective coatings by spark plasma sintering (SPS) method on molybdenum substrate. Microstructure and properties of the coatings were investigated and determined. Oxidation behavior of the coatings at high temperature was also studied. The results showed that the composite coating is dense and crack-free due to the addition of ZrO 2 , which is beneficial for the decrease of mismatch in coefficient of thermal expansion, and no void exists in the diffusion layer owing to the diffusion of Si, which is inhibited by adding MoB. Compared with the pure MoSi2 coating, the high hardness of the composite coating is enhanced by about 20% while the fracture toughness of the composite coating is improved by about 25%, which makes the occurrence of intergranular fracture , crack deflection and crack bridging. After oxidation at 1400 °C for 80 h, MoSi 2 coating failed while xMoSi 2 -MoB-3ZrO 2 (x = 3, 4, 5) composite coating still kept its protective effect. Only a little substrate is consumed during oxidation and improved oxidation resistance is gained by MoSi 2 -MoB-ZrO 2 composite coating. 3MoSi 2 -MoB-3ZrO 2 coating shows the relatively best oxidation resistance due to the formation of crack-free oxide film on the surface of the coating.
研究领域:
材料科学
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表面工程
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高温氧化
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陶瓷涂层
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粉末冶金
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2017
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IF 3.133
Chunmin Wang,Jun Shen,Xiankun Zhang,Bin Duan,Jiaxin Sang
A new organic-inorganic composite coating was generated on AZ31 alloy surface with sol-gel method to improve the anti-corrosion performance and biocompatibility of AZ31 alloy in the physiological environment. The results of electrochemical impedance spectroscopy (EIS), potentiodynamic polarization , pH variations in modified-simulated body fluid (m-SBF) demonstrated that the silane/Mg(OH) 2 composite coating significantly enhanced the anti-corrosion ability and slowed down the degradation of AZ31 alloy under in vitro condition. Fourier-transform infrared spectroscopy (FTIR) showed that the major composition of in-situ formation layer was Mg(OH) 2 . The surface morphology , chemical and phase constitutions of the composite coating were detected using scanning electron microscopy (SEM). The results demonstrated that the composite coating was uniform and defect-free. X-ray diffraction analysis (XRD) was also employed to characterize the corrosion products of all specimens immersed in m-SBF after 30 days. MTT and ALP tests indicated that the composite coating greatly enhanced the cell proliferation and osteogenic differentiation of osteoblasts on the AZ31 alloy surface.
研究领域:
生物材料学
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表面工程
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组织工程
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生物医学工程
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腐蚀科学
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骨科学
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
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2016
·Vol. 27
·期 11
·1501-1507
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IF 1.823
Zhubo Liu,Bing Zhou,A.V. Rogachev,M.A. Yarmolenko
Polytetrafluoroethylene (PTFE) composite coatings doped copper acetate and polyurethane (PU) were prepared on rubber substrate by low-energy electron beam dispersion technique. The effects of dopant and glow discharge treatment on the surface morphology, structure and tribological properties of the coatings were investigated. The results showed that Cu–PTFE composite coatings form uniform surface and dense column structure with spherical aggregations under glow discharge treatment. PU coating shows the large size of protuberance structure but PU–PTFE coating presents spherical structure. Both of the coatings become relative dense and smooth after discharge treatment, and Cu–PU–PTFE composite coatings possess a smoother surface and lower polar component of surface energy. Cu doping weakens the crystallinity and ordering degree of composite coatings, but glow discharge increases the ordering degree and branched structure of C―H groups. Friction experiment indicated that Cu fails to improve the wear resistance of PTFE coatings but glow discharge treatment can do it. Cu–PU–PTFE coatings after discharge treatment have the higher wear resistance and lower coefficient of friction. Copyright © 2016 John Wiley & Sons, Ltd.
研究领域:
材料科学
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表面工程
·
高分子材料
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摩擦学
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等离子体物理
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涂层技术
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DOI
高影响因子
Nano Select
·
2021
·Vol. 2
·期 6
·1225-1232
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IF 0
Ziqi Zhang,Yan Zhang,Yingqi Liu,Siqi Zhang,Kaida Yao,Yueqiu Sun,Yang Liu,Xiangzhi Wang,Weimin Huang,Jun Lu
Cerium has been used as an implanted alloy additive for many years for it can enhance the mechanical properties of the alloy and restrain the corrosion of the implant. Moreover, cerium oxide nanoparticles are often used as an antibacterial material. However, there were few researches focusing on the antibacterial properties of Ce 3+ and Ce 4+ ions, instead of their corresponding oxide, as potential antibacterial coatings. Thus in this work, we loaded Ce ions into the porous structure of the ZIF-8 nanoparticles and co-deposited them with hydroxyapatite as a composite coating onto anodized titanium dioxide nanotubes array in order to test whether it can improve the anti-corrosion and antibacterial properties of the materials without affecting the biocompatibility.
研究领域:
生物材料学
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纳米医学
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表面工程
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骨科植入物
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抗菌材料
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生物医学工程
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DOI
危险品化学品经营许可证（带存储）