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Effect of silane coupling agents on interfacial features and joint performance of ultrasonically welded AA6061 aluminum alloy to carbon fiber reinforced PA6 认领 引用
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作者 Haipeng ZHOU Yufan CAI +2 位作者 Yuanduo YANG Sansan AO Yang LI 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第5期574-592,共19页
The use of Silane Coupling Agent(SCA)is an important way to improve the joining quality between metal and plastic.However,how to rationally use SCAs is still lack of guidance.We investigate the effect of type of SCA,s... The use of Silane Coupling Agent(SCA)is an important way to improve the joining quality between metal and plastic.However,how to rationally use SCAs is still lack of guidance.We investigate the effect of type of SCA,soaking time of SCA,and combination of SCA on the interfacial features and joint performance of ultrasonically welded AA6061 to CF/PA6.Four SCAs(γ-chloropropyltrimethoxysilane(NQ54),γ-chloropropyltriethoxysilane(KH230),vinyltrimethoxysilane(A171),γ-aminopropyltriethyloxysilane(KH550))were selected.The results show that the optimal joint strength(30.2 MPa)is obtained when the Al sheets are soaked in KH550 for 3 min.A fully dehydrated condensation reaction occurs between the OAH of the KH550 and the OAH on the aluminum alloy surface,forming plenty of Si AOAAl bonds,which contribute to the improved wetting behavior of liquid PA6 on the aluminum alloy surface.However,the combination of SCAs leads to the consumption of functional groups,hindering the formation of Si AOAAl bonds,and therefore reducing the joint performance. 展开更多
关键词 Aluminum alloy Carbon fiber reinforced thermoplastic Coupling agent Performance Silane Ultrasonic welding
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Preparation and characterization of silane film modified with hydroxyapatite nanoparticles on magnesium alloy:Blistering initiating film failure and inhibitory effect of hydroxyapatite nanoparticles 认领 引用 被引量：1
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作者 Zhigang Song Yue Mu +3 位作者 Guiyong Xiao Ming Xie Guanghao Gong Yupeng Lu 《Nano Materials Science》 EI CAS CSCD 2026年第1期107-116,共10页
Rapid corrosion of magnesium alloys in the physiological environment limits their use as orthopedic implant materials.Therefore,the silane film modified with nano-hydroxyapatite(n HA)was prepared on the surface of AZ3... Rapid corrosion of magnesium alloys in the physiological environment limits their use as orthopedic implant materials.Therefore,the silane film modified with nano-hydroxyapatite(n HA)was prepared on the surface of AZ31 magnesium alloy to improve its corrosion resistance.The silane films are continuous,uniform,and adherent well to the Mg substrate,and the modification of the film by n HA increased the thickness from~1.92 to~3.25μm.Compared to the bare substrate,the corrosion current density of the sample with the silane film modified with n HA decreases by three orders of magnitude from 9.23×10-5to 2.779×10-8A/cm~2.According to the immersion tests,it is found that the synergistic effect of sub-film corrosion and blistering is the dominant mode of film failure.During the immersion of less than 72 h,the modification by n HA improves the corrosion resistance by delaying the sub-film corrosion and blistering of the film. 展开更多
关键词 Magnesium alloy Nanohydroxyapatite particle Silanization Corrosion resistance
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Corrosion Evolution Behavior of Ti/Zr/Oligomeric Epoxy Silane Composite Chemical Conversion Coatings on Multi‑metals 认领 引用
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作者 Yunhu Ding Yingpeng Li +4 位作者 Hongfang Liu Wenhao Wang Yijun Wei Haitao Duan Wen Zhan 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2025年第6期889-903,共15页
The new energy vehicle body composed of multi-metals requires a synchronous chemical conversion coating to exhibit excellent corrosion resistance.Herein,we prepared a titanium/zirconium/water-based oligomeric epoxy si... The new energy vehicle body composed of multi-metals requires a synchronous chemical conversion coating to exhibit excellent corrosion resistance.Herein,we prepared a titanium/zirconium/water-based oligomeric epoxy silane composite chemical conversion coating on multi-metals,and conducted an investigation into its electrochemical behavior and micro-zone structural characteristics upon immersion in a 3.5%NaCl solution.The electrochemical results combined with characterization results revealed that the corrosion evolution characteristics of the composite coatings could be categorized into three stages of mild corrosion,synergistic protection,and substrate damage.Besides,Si-OH groups interact with Me-OH at the defect on the multi-metal surface to form an organic monolayer coating.This organic monolayer coating,in conjunction with the synergistic inorganic conversion layer comprising Al2O3,TiO2,2H2O,ZrO2,2H2O,effectively cooperates with the corrosion products to hinder the erosion by the corrosive medium and suppresses the progression of the anodic reaction. 展开更多
关键词 Composite chemical conversion Ti/Zr/epoxy silane coatings Aluminum alloys Galvanized steel Corrosion behavior
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Preparation and Performance Evaluation of Waterborne Polyurethane Modified with Silane Coupling Agent and Castor Oil 认领 引用
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作者 LIU Yunxue SUN Qilin +3 位作者 FAN Zhaorong GU Yaxin WANG Xiumei LIU Peng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2025年第6期1818-1828,共11页
An environmentally friendly waterborne polyurethane(CWPU)emulsion was developed via a dual modification strategy by combining both the silane coupling agent KH-602 with renewable castor oil(CO)as a sustainable substit... An environmentally friendly waterborne polyurethane(CWPU)emulsion was developed via a dual modification strategy by combining both the silane coupling agent KH-602 with renewable castor oil(CO)as a sustainable substitute for petroleum-based polyols.The resulting materials were thoroughly characterized using Fourier-transform infrared spectroscopy(FTIR),thermogravimetric analysis(TGA),and differential scanning calorimetry(DSC).Furthermore,the influence of KH-602 content on the material properties was systematically investigated.The experimental results reveal that the incorporation of KH-602 significantly improves the thermal stability of the composite coating.As the KH-602 content increases,the tensile strength exhibits a gradual enhancement,while the elongation at break displays an initial increase followed by a subsequent decline.At an optimal KH-602 content of 3%,the coating demonstrates a balanced performance,achieving a tensile strength of 14.19 MPa and an elongation at break of 731.12%.These results suggest that the dual modification approach enhances mechanical and thermal properties while maintaining water resistance,making it suitable for sustainable coating applications. 展开更多
关键词 silane coupling agent waterborne polyurethane modification
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Visible Light-Promoted Aerobic Oxo-azidation of Alkenyl Silanes 认领 引用 被引量：3
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作者 Tan Yan Ying Jiale +1 位作者 Yu Bing Lu Zhan 《有机化学》 SCIE CAS CSCD 北大核心 2025年第5期1684-1690,共7页
A visible-light-enabled method for the synthesis ofα-azidoketones has been developed via oxo-azidation of alkenyl silanes with trimethylsilylazide and molecular oxygen under mild conditions.The reaction could be carr... A visible-light-enabled method for the synthesis ofα-azidoketones has been developed via oxo-azidation of alkenyl silanes with trimethylsilylazide and molecular oxygen under mild conditions.The reaction could be carried out in gram scale.Various radical sources,including trifluoromethyl radical,thiocyanate radical,bromide radical,chlorine radical could partici-pate effectively instead of azide radical in the reaction. 展开更多
关键词 visible light catalysis aerobic oxidation alkenyl silanes organic azides
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Silane Terminated Prepolymers: An Alternative to Silicones and Polyurethanes 认领 引用
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作者 Ravindra V. Gadhave Chaitali R. Gadhave Pritam V. Dhawale 《Open Journal of Polymer Chemistry》 2021年第3期31-54,共24页
Silane terminated prepolymers for adhesives, sealants and coatings are of great industrial importance. They are very important because of their low toxicity over polyurethanes, silicones, and solvent-based products. H... Silane terminated prepolymers for adhesives, sealants and coatings are of great industrial importance. They are very important because of their low toxicity over polyurethanes, silicones, and solvent-based products. Hence, many pieces of literature which deal with the synthesis, properties and applications of this Silane terminated polymers hybrid system exist. Silylated polyether (MS polymers) and Silylated Polyurethane Polymers (SPUR) are the bases for numerous sealants, adhesives and coatings used worldwide. A hybrid system mixed with organic-polyurethane proportion and inorganic-alkoxysilane proportion combines the benefits of conventional polyurethane and silicone-based products. This article reviews the chemistry of MS polymers and SPUR and their advantages and disadvantages in silyl terminated prepolymer-based adhesives, sealants and coatings as well as provides information on different end applications. 展开更多
关键词 Silanes Silane Terminated Polyethers Silane-Terminated Polyurethanes Adhesives Sealants Coatings
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Synthesis of Acrylate Microemulsion Modified by Alkoxy Silane 认领 引用 被引量：1
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作者 SUN Zhijuan ZHANG Xinya +2 位作者 HUANG Hong FU Heqing CHEN Huangin 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2008年第2期212-217,共6页
An acrylate emulsion was modified by adding vinyltriisopropoxy silane(trade name C-1706).By adding the multiple emulsifier which consists of an anionic emulsifier,sodium dodecyl benzene sulfonate(SDBS)and nonionic emu... An acrylate emulsion was modified by adding vinyltriisopropoxy silane(trade name C-1706).By adding the multiple emulsifier which consists of an anionic emulsifier,sodium dodecyl benzene sulfonate(SDBS)and nonionic emulsifier,octyl phenolic divinyl oxide(OP-10),the acrylosilane microemulsion was synthesized by seeded emulsion polymerization.The influential factors including the kind and the adding amount of emulsifiers and the monomer variety of alkoxy silane and the added methods which influence on the properties of the microemulsion were investigated.It is found that SDBS and OP-10 as multiple emulsifiers with mass ratio of 1:1 and the adding amount of 2.5%-3.5%can act on co-effect for emulsion polymerization.The C-1706 possesses bulky isopropoxy substituent that can reduce hydrolysis reactivity during the polymerization process,so as to not only make the process smoothly but also advance the store stability of the emulsion.Moreover,the latter-addition mode of C-1706 can restrain its hydrolysis activity and polycondensation reaction during the polymerization process of the emulsion.The structure,the film cross section,the particle size and its distribution of the microemulsion were analyzed by the Fourier Transform Infrared Ray Spectrum(FTIR),Scanning Electron Microscopy(SEM)and a particle size analyzer,respectively.The results show that the particle diameter of the modified microemulsion can be controlled between 50 and 70 nm and its film hardness is 7.3.Only adding 1.5%of C-1706 into the system of emulsion polymerization can apparently improve the weathering resistance of the microemulsion,which undergo degradation with chromatism(△E)is 1.6 after 3600 hours of QUV-aging. 展开更多
关键词 alkoxy silane acrylosilane microemulsion modification properties
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Study on corrosion resistance of the BTESPT silane cooperating with rare earth cerium on the surface of aluminum-tube 认领 引用 被引量：28
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作者 肖围 满瑞林 +1 位作者 缪畅 彭天兰 《Journal of Rare Earths》 SCIE EI CAS 2010年第1期117-122,共6页
Bis-3-(triethoxysilyl)propyltetrasulfide(BTESPT) silane-rare earth cerium composite coatings on aluminum-tube were prepared at 60 °C by immersion method.The performance of composite coatings to protect the alumin... Bis-3-(triethoxysilyl)propyltetrasulfide(BTESPT) silane-rare earth cerium composite coatings on aluminum-tube were prepared at 60 °C by immersion method.The performance of composite coatings to protect the aluminum-tube against corrosion was investigated with potentiodynamic polarization curves,electrochemical impedance spectroscopy(EIS),and salt spray test(SST).The results of potentiodynamic polarization curves and EIS indicated that the self-corrosion current decreased by two orders of magnitude and the i... 展开更多
关键词 aluminum-tube BTESPT silane rare earth cerium composite coating corrosion resistance
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Corrosion resistance of Mg(OH)2/Mg-Al-layered double hydroxide coatings on magnesium alloy AZ31:influence of hydrolysis degree of silane 认领 引用 被引量：11
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作者 Qing-Song Yao Zhong-Chao Li +5 位作者 Zai-Meng Qiu Fen Zhang Xiao-Bo Chen Dong-Chu Chen Shao-Kang Guan Rong-Chang Zeng 《Rare Metals》 SCIE EI CAS CSCD 2019年第7期629-641,共13页
Mg(OH)2/Mg-Al-layered double hydroxide (LDH) coatings were modified with methyltrimethoxysilane (MTMS) on magnesium alloys. Effect of hydrolysis degree of silane solution on coating formation was investigated. Chemica... Mg(OH)2/Mg-Al-layered double hydroxide (LDH) coatings were modified with methyltrimethoxysilane (MTMS) on magnesium alloys. Effect of hydrolysis degree of silane solution on coating formation was investigated. Chemical compositions and surface morphologies of the coatings were examined using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and field-emission scanning electronic microscopy (FESEM). Results indicated that the composite coatings consisted of polymethyltrimethoxysilane (PMTMS), LDH and Mg(OH)2. Electrochemical and hydrogen evolution measurements revealed that the composite coatings possessed good corrosion resistance, especially the ones prepared in a high hydrolysis degree of silane. The optimum corrosion resistance of the composite coati ng was LDH/PMTMS-3 coating, which had the lowest value of corrosion current density (5.537×10^-9 A·cm^-2) and a dense surface.Plausible mechanism for coating formation and corrosion process of MTMS-modified Mg(OH)2/Mg-Al-LDH coatings were discussed. 展开更多
关键词 Magnesium alloy Layered double hydroxide (LDH) Silane Coating Corrosion resistance
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Corrosion resistance of Mg−Al LDH/Mg(OH)2/silane−Ce hybrid coating on magnesium alloy AZ31 认领 引用 被引量：19
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作者 Zai-meng QIU Rong-chang ZENG +2 位作者 Fen ZHANG Liang SONG Shuo-qi LI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第11期2967-2979,共13页
An environmentally-friendly hybrid coating on AZ31 magnesium alloy substrates was reported.The synergic effect was studied on Mg−Al-layered double hydroxide Mg−Al LDH/Mg(OH)2-coated AZ31 magnesium alloy via an in-situ... An environmentally-friendly hybrid coating on AZ31 magnesium alloy substrates was reported.The synergic effect was studied on Mg−Al-layered double hydroxide Mg−Al LDH/Mg(OH)2-coated AZ31 magnesium alloy via an in-situ steam coating process and a subsequent combined surface modification of bis-[triethoxysilylpropyl]tetrasulfide(BTESPT)silane and Ce(NO3)3.The microstructure and composition characteristics of the hybrid coatings were investigated by means of X-ray diffraction(XRD),scanning electronic microscopy(SEM),Fourier transform infrared spectrophotometry(FT-IR)and X-ray photoelectron spectroscopy(XPS).The corrosion resistance of the coated samples was evaluated by potentiodynamic polarization(PDP),electrochemical impedance spectrum(EIS)and hydrogen evolution rate during immersion in 3.5 wt.%NaCl solution.The results show an improved corrosion resistance of the alloy in the presence of BTESPT silane and Ce(NO3)3.This is most likely due to the synergistic effect of steam coating and silane coating to enhance the barrier properties of hybrid coating.In addition,the formation mechanism and anti-corrosion mechanism of coatings were discussed. 展开更多
关键词 magnesium alloy silane coating layered double hydroxide corrosion resistance
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Corrosion Resistance of Silane-Modified Hydroxyapatite Films on Degradable Magnesium Alloys 认领 引用 被引量：7
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作者 Yan-Bin Zhao Li-Qian Shi +5 位作者 Lan-Yue Cui Chang-Lei Zhang Shuo-Qi Li Rong-Chang Zeng Fen Zhang Zhen-Lin Wang 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2018年第2期180-188,共9页
A polymethyltrimethoxysilane（PMTMS）/hydroxyapatite（HA） hybrid coating was successfully fabricated on a magnesium alloy by hydrothermal treatment and immersion method. The microstructure and composition of the coat... A polymethyltrimethoxysilane（PMTMS）/hydroxyapatite（HA） hybrid coating was successfully fabricated on a magnesium alloy by hydrothermal treatment and immersion method. The microstructure and composition of the coating were characterized by using X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy.The physical properties were investigated using scratch testing. At the same time, the corrosion resistance was evaluated via electrochemical and immersion tests. The results demonstrated that the corrosion resistance of the silane hybrid coating was significantly enhanced compared with the naked magnesium alloy. Especially, the corrosion current density of the PMTMS/HA magnesium alloy was three orders of magnitude lower than that of the bare material. 展开更多
关键词 Magnesium alloys Silane Hydroxyapatite Corrosion resistance Biomaterial
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Post treatment of silane and cerium salt as chromate replacers on galvanized steel 认领 引用 被引量：18
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作者 孔纲 卢锦堂 吴海江 《Journal of Rare Earths》 SCIE EI CAS 2009年第1期164-168,共5页
A complex film on hot-dip galvanized steel sheet（HDG） was prepared by immersing the sheet in 0.1wt.% Ce（NO3）3 solution and 5vol.% silane solution in turn.The corrosion protection of the complex film was evaluated ... A complex film on hot-dip galvanized steel sheet（HDG） was prepared by immersing the sheet in 0.1wt.% Ce（NO3）3 solution and 5vol.% silane solution in turn.The corrosion protection of the complex film was evaluated by potentiodynamic linear polarization（LPR）, electrochemical impendence spectra（EIS） and natural salt spray（NSS） tests and compared with that of single cerium film and silane film.The results showed that, the presence of these films on the zinc coating hindered corrosion reaction by reducing the rate of both anodic and cathodic reaction in the corrosion process, and the corrosion protection of the complex film was much better than that of single cerium film or silane film and closed to that of chromate film, because the polarization resistance Rp and electrochemical impendence were increased markedly.Microstructure and chemical composition of these pretreated films were also investigated by scanning electron microscopy（SEM） and AES. 展开更多
关键词 cerium salt silane Galvanized steel passivation rare earths
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Synthesis and properties of a silane and copolymer-modified graphene oxide for use as a water-reducing agent in cement pastes 认领 引用 被引量：15
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作者 WANG Qin LI Shi-yu +1 位作者 PAN Shuo GUO Zi-wei 《新型炭材料》 CSCD 北大核心 2018年第2期131-139,共9页
The addition of graphene oxide(GO)to cement paste significantly increases its toughness,however its fluidity is adversely affected.GO was first reacted with vinyltrimethoxysilane to produce a silane-modified graphene ... The addition of graphene oxide(GO)to cement paste significantly increases its toughness,however its fluidity is adversely affected.GO was first reacted with vinyltrimethoxysilane to produce a silane-modified graphene oxide(S-GO),which was then copolymerized with acrylic acid and a water reducing agent,isobutaenol polyoxyethylene ether(molecular mass 2400),to obtain a silane and copolymer-modified GO(P-S-GO)which acted as a water-reducing agent of the cement paste.A copolymer without GO was prepared under the same conditions for comparison.The structure,elemental composition and dispersibility of GO,S-GO and P-S-GO in a simulated cement environment(saturated lime water)were investigated by FTIR,XRD and a sedimentation test.The fluidity and rheology of the cement pastes with added GO,copolymer or P-S-GO were investigated.Results showed that vinyltrimethoxysilane reacted with the-OH group on the GO sheets to form an ether bond and the copolymer was grafted onto a vinyl group of S-GO by an addition reaction to produce the P-S-GO.The P-S-GO has a better dispersibility in saturated lime water with a negligible amount of aggregation compared to GO and a significant agglomeration occurs for GO.The addition of the P-S-GO to the cement pastes improves the fluidity and rheological properties compared with GO,offsetting the negative impact of GO and increasing the toughness of the resulting cements. 展开更多
关键词 Graphene oxide Silane coupling agent modified Fluidity Rheological property
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Synthesis and Characterization of Waterborne Epoxy Curing Agent Modified by Silane 认领 引用 被引量：28
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作者 卢光岐 孙建中 周其云 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2007年第6期899-905,共7页
A novel waterborne epoxy curing agent was prepared using 3-glycidoxypropyl trimethoxysilane （GPTMS） as a termination agent of adduct, which was synthesized by triethylene tetramine （TETA） and liquid epoxy resin （... A novel waterborne epoxy curing agent was prepared using 3-glycidoxypropyl trimethoxysilane （GPTMS） as a termination agent of adduct, which was synthesized by triethylene tetramine （TETA） and liquid epoxy resin （E-51）. The effects of the reaction temperature and time on the synthesis process were investigated experimentally. The particle size and the distribution of water dispersion of the curing agent were measured by dynamic light scattering（DLS）. The structure of the products was characterized by Fourier transform infrared spec-trometer （FTIR） and ^1H-nuclear magnetic resonance （^1H NMR）. The properties of the synthesized curing agent and the epoxy resin film cured by it were also measured. The results showed that the appropriate temperature for the synthesis of adduct was at 65-75℃ and the reaction time was 4-5h, and that the suitable reaction temperature of curing agent synthesis was 75-85℃ and the reaction time was 3-4h. When the mass ratios of GPTMS and acetic acid were 3%-5% and 5%-10% respectively, the hardness, water resistance and adhesion of the cured film were improved significantly. 展开更多
关键词 waterborne epoxy curing agent silane modification
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Preparation and properties of silane coupling agent modified steel slag as functional filler for anti-corrosion coating 认领 引用 被引量：5
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作者 Wei-cheng Zheng Wei-cheng Xu +6 位作者 Hao Zhang Hao-xuan Zheng Lin Wang Zheng-ming Cheng Yan-fei Ye Jun Lin Hong-ming Long 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2023年第4期708-716,共9页
The chemical composition and high wear resistance of steel slag(SS)make it a potential alternative to traditional inorganic fillers.3-Aminopropyltriethoxysilane(KH550)modified steel slag(MSS)was successfully prepared,... The chemical composition and high wear resistance of steel slag(SS)make it a potential alternative to traditional inorganic fillers.3-Aminopropyltriethoxysilane(KH550)modified steel slag(MSS)was successfully prepared,and its application in epoxy(EP)anti-corrosion coating was introduced.Due to the grafting of silane coupling agent functional groups onto the surface of SS,MSS exhibited improved solubility in xylene organic solvent and reduced agglomeration.When the MSS content was 15 wt.%,the contact angle of the MSS/EP composite coating was 101°,and the abrasion was only 0.07 g,compared with 56.2°and 0.13 g,respectively,for the pure EP coating.The corrosion resistance of coatings was investigated by performing the electrochemical test(impedance)after immersion in a 3.5 wt.%NaCl solution.The electrochemical test results showed that the impedance modulus of the 15 wt.%MSS/EP composite coating at low frequency(Zf=0.01 Hz)was approximately 1.08×107Ωcm2,which was two orders of magnitude higher than that of the pure EP coating. 展开更多
关键词 Steel slag Silane coupling agent Modification Epoxy coating Inorganic filler
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CORROSION RESISTANCE OF HOT DIP GALVANIZED STEEL PRETREATED WITH BIS-FUNCTIONAL SILANES MODIFIED WITH NANOALUMINA 认领 引用 被引量：9
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作者 F.J. Shan C.S. Liu +1 位作者 S.H. Wang G.C. Qi 《Acta Metallurgica Sinica(English Letters)》 EI CAS 2008年第4期245-252,共8页
The corrosion behavior of hot dip galvanized steel pretrvated with bis-[triethoxysilylpropyl] tetrasulfide （BTESPT） modified with alumina particles was studied. The corrosion resistance of the passiving films was ev... The corrosion behavior of hot dip galvanized steel pretrvated with bis-[triethoxysilylpropyl] tetrasulfide （BTESPT） modified with alumina particles was studied. The corrosion resistance of the passiving films was evaluated by Tafel polarization curve and electrochemical impedance spectroscopy. The films formed on the galvanized steel substrate were characterized by Fourier transform infrared spectroscopy and energy dispersive X-ray spectrometry. The surface morphology of the treated hot dip galvanized steel samples was observed by Field Emission Scanning Electron Microscope. The results show that the pretrvatments on the basis of silane films modified with nanoalumina particles have reduced both anodic and cathodic current densities, and increased total impedance in the measured frequency, consequently, improving corrosion protection for hot dip galvanized steel during immersion in NaCl solutions compared to chromate films and silane films. 展开更多
关键词 Bis-sulfur silane Nanoalumina Corrosion protection Characterization Hot dip galvanised steel
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Rare earth and silane as chromate replacers for corrosion protection on galvanized steel 认领 引用 被引量：29
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作者 彭天兰 满瑞林 《Journal of Rare Earths》 SCIE EI CAS 2009年第1期159-163,共5页
The present work aimed at using rare earth lanthanum salt and trimethoxy（viny）silance as chromate substitutes for galvanized steel passivation, in contrast to zinc coating samples treated with chromate.The corrosion... The present work aimed at using rare earth lanthanum salt and trimethoxy（viny）silance as chromate substitutes for galvanized steel passivation, in contrast to zinc coating samples treated with chromate.The corrosion resistance was assessed by electrochemical impedance spectroscopy（EIS） and neutral salt spray tests（NSS）.Scanning electron microscopy（SEM） was used to characterize the sample surfaces.The organic coating adhesion on the panel was also investigated via varnishes-cross cut tests.The results indicated that rare earth and silane two-step treatment gave more effective anticorrosion performance than Cr, which also provided good paint adhesion.The coating formation mechanism was also discussed. 展开更多
关键词 silane corrosion lanthanum galvanized steel rare earths
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Effect of silane coupling agents on flowability and compressibility of compound for bonded NdFeB magnet 认领 引用 被引量：4
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作者 Xiaowei Zhang Zilong Wang +4 位作者 Tianhao Li Shengjie Zhu Dunbo Yu Wenlong Yan Yang Luo 《Journal of Rare Earths》 SCIE EI CAS CSCD 2022年第5期772-777,I0004,共6页
Based on the difference of the Y-terminal functional group of the silane coupling agent(Y-Si(X)3),four different silane coupling agents were employed to pretreat the surface of the NdFeB powders.The effects of sila... Based on the difference of the Y-terminal functional group of the silane coupling agent(Y-Si(X)3),four different silane coupling agents were employed to pretreat the surface of the NdFeB powders.The effects of silane coupling agents on the flowability and compressibility of compounds for preparing bonded NdFeB magnets were studied.It is indicated that compounds pretreated by silane coupling agents have weaker friction and meshing force.The apparent density is increased by 0.3 g/cm^(3 )compared with the compound without silane coupling agent,and the radial crushing strength is significantly increased by about 3-4 times.In addition,the epoxy resin is more evenly distributed on the surface of the compounds treated by silane coupling agents observed by scanning electron microscopy,and some agglomerated particles are produced.Also,the compressibility of compounds with silane coupling agents is significantly improved due to the fact that hardening exponents are reduced.However,the addition of silane coupling agents has almost no effect on the magnetic properties of bonded magnets.The special energy was used to manifest the flowability of magnetic powder particles representing the macroscopic performance of the force between powder particles,providing a new direction for the study of the interface compatibility of two-phase or multiphase composite materials. 展开更多
关键词 Bonded NdFeB magnets Silane coupling agent Flowability Special energy Compressibility Rare earths
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Structure and Corrosion Resistance of a Composite γ-Amino Propyl Triethoxy Silane and γ-Glycidoxy Propyl Trimethoxy Silane Conversion Coating on Galvanized Steel 认领 引用 被引量：10
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作者 WANG Lei LIU Chang-sheng +1 位作者 YU Hai-yun AN Cheng-qiang 《Journal of Iron and Steel Research International》 SCIE CAS CSCD 2012年第11期46-51,共6页
In an aqueous solution of the mixtures of γ-amino propyl triethoxy silane and γ-glycidoxy propyl trimethoxy silane, a composite silane conversion coating was developed on galvanized steel. FESEM （field emission sca... In an aqueous solution of the mixtures of γ-amino propyl triethoxy silane and γ-glycidoxy propyl trimethoxy silane, a composite silane conversion coating was developed on galvanized steel. FESEM （field emission scanning electron microscope）, XPS （X-ray photoelectron spectroscopy）, ATR FTIR （attenuated total reflection Flourier transform infrared spectroscopy） and SST （salt spray test） were used to characterize the obtained composite silane conversion coating and also the coating formation process was studied. The result showed that the surface of the composite silane conversion coating was complete, consecutive and compact. The coating could endure a neutral salt spray test for 72 h without corrosion. The result of salt spray test indicated that the composite silane conversion coating can provide a better corrosion inhibition than the coating which was composed of the single silane. Based on observation and analysis, it was proposed that the formation process of the silane coating on zinc should consist of three steps： the hydrolysis of the silane molecules, silane chemical adsorption and silane crosslinking condensation. The crosslinking reactions took place between ~＇-amino propyl triethoxy and ＂/-glycidoxy propyl trimethoxy silane during the forming process of the coating, and a high crosslinked density interpenetrating structure network was obtained, so the composite silane conversion coating could keep the corrosive substances from the zinc more effectively. 展开更多
关键词 galvanized steel composite silane conversion coating structure forming process corrosion resistance
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Corrosion protection of AZ31 magnesium alloy treated with La3+ modified 3-methacryloxypropyltrimethoxysilane conversion film 认领 引用 被引量：6
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作者 乔英杰 李文鹏 +1 位作者 王桂香 张晓红 《Journal of Rare Earths》 SCIE EI CAS CSCD 2015年第6期647-654,共8页
This study demonstrated the influence of addition concentration of La3＋ on the anti-corrosion behavior of a 3-methacry- loxypropyltrimethoxysilane （MPS） film formed on AZ31 magnesium alloy. The morphology and surfa... This study demonstrated the influence of addition concentration of La3＋ on the anti-corrosion behavior of a 3-methacry- loxypropyltrimethoxysilane （MPS） film formed on AZ31 magnesium alloy. The morphology and surface chemistry of the samples were evaluated through scanning electron microscopy （SEM） and Fourier transform infrared spectroscopy （FT-IR）, respectively. The corrosion resistance of the pre-treated AZ31 magnesium alloy was studied during immersion in 0.1 mol/L NaC1 solution, using poten- tiodynamic polarization curves and electrochemical impedance spectra （EIS）. In comparison to MPS film, the low concentration of La3＋ ion modified silane layer exhibited a better anti-corrosion performance, nevertheless, the high concentration of La3＋ ion modified was worse. Results showed that the preferable addition concentration of La3＋ ion in the silane film was 5Х 10-4 mol/L in this experi- ment. 展开更多
关键词 AZ31 Mg alloy silanes lanthanum corrosion rare earths
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