检索结果-南通市图书馆

Effect of modified MgAl-LDH coating on corrosion resistance and friction properties of aluminum alloy

Chinese Journal of Chemical Engineering 2023年第11期63卷 81-95页

作者： Zuokai Wang Zhuangzhuang Xiong Xinxin Li Di Wang Yuelin Wang Shangcheng Wu Lixia Ying Zhideng Wang Guixiang Wang College of Materials Science and Chemical Engineering Harbin Engineering UniversityHarbin 150001China College of Mechanical and Electrical Engineering Harbin Engineering UniversityHarbin 150001China College of Materials Science and Chemical Engineering Yantai Research Institute of Harbin Engineering UniversityYantai 265503China

The in-situ growing approach was utilized in this article to construct the magnesium–aluminum layered double hydroxide(MgAl-LDH)film on the surface of a 1060 aluminum anodized film.To improve the corrosion resistance and friction qualities of aluminum alloy,the MgAl-LDH coating was treated using stearic acid(SA)and thiourea(TU).The aluminum substrate and anodized aluminum film layer corroded to varying degrees after 24 h of immersion in 3.5%(mass)NaCl solution,while the modified hydrotalcite film layer continued to exhibit the same microscopic morphology even after being immersed for 7 d.The results show that the synergistic action of thiourea and stearic acid can effectively improve the corrosion resistance of the MgAl-LDH substrate.The tribological testing reveals that the hydrotalcite film layer and the modified film layer lowered the friction coefficient of the anodized aluminum surface substantially.The results of the simulations and experiments demonstrate that SA forms the dense LDH-TU interlayer film layer by exchanging NO_(3)^(-)ions between TU layers on the one hand and the LDH-SA film layer by adsorption on the surface of LDH on the other.Together,these two processes create LDH-TUSA,which can significantly increase the substrate’s corrosion resistance.This synergistically modified superhydrophobic and retardant hydrotalcite film layer offers a novel approach to the investigation of wear reduction and corrosion protection on the surface of aluminum and its alloys.

关键词： anodizing Layered double hydroxide Superhydrophobic Corrosion resistance Tribological properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

New development of anodizing process of magnesium alloys

引用

中国有色金属学会会刊：英文版 2004年第Z1期14卷 120-125页

作者： BAI Li-qun LI Di School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

Magnesium alloy, a kind of environment-friendly material with promising and excellent properties, is a good choice for a number of applications. The research and development of anodizing on magnesium alloys and its ap... 详细信息

关键词： magnesium magnesium alloy anodizing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Evolution of insoluble eutectic Si particles in anodic oxidation films during adipic–sulfuric acid anodizing processes of ZL114A aluminum alloys

引用

International Journal of Minerals,Metallurgy and Materials 2015年第3期22卷 302-308页

作者： Lei Hua Jian-hua Liu Song-mei Li Mei Yu Lei Wang Yong-xin Cui School of Materials Science and Engineering Beihang University Beijing Xinghang Mechanical-electrical Equipment CO. LTD.

The effects of insoluble eutectic Si particles on the growth of anodic oxide films on ZL114A aluminum alloy substrates were in- vestigated by optical microscopy （OM） and scanning electron microscopy （SEM）. The anodic oxidation was performed at 25℃ and a con- stant voltage of 15 V in a solution containing 50 g/L sulfuric acid and 10 g/L adipic acid. The thickness of the formed anodic oxidation film was approximately 7.13 μm. The interpore distance and the diameters of the major pores in the porous layer of the film were within the ap- proximate ranges of 10~20 nm and 5-10 nm, respectively. Insoluble eutectic Si particles strongly influenced the morphology of the anodic oxidation films. The anodic oxidation films exhibited minimal defects and a uniform thickness on the ZL114A substrates; in contrast, when the front of the oxide oxidation films encountered eutectic Si particles, defects such as pits and non-uniform thickness were observed, and pits were observed in the films.

关键词： aluminum alloys anodizing anodic oxidation thin films eutectic silicon particles

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Superhydrophobicity of Bionic Alumina Surfaces Fabricated by Hard anodizing

引用

Journal of Bionic Engineering 2011年第4期8卷 369-374页

作者： Jing Li Feng Du Xianli Liu Zhonghao Jiang Luquan Ren Key Laboratory of Bionic Engineering (Ministry of Education China) Jilin University Changchun 130022 P. R. China College of Mechanical and Electric Engineering Changehun University of Science and Technology Changchun 130022 P. R. China Armor Technique Institute of PLA Changchun 130017 P. R. China Key Lab of Automobile Materials (Ministry of Education China) Jilin University Changchun 130022 P. R. China

Bionic alumina samples were fabricated on convex dome type aluminum alloy substrate using hard anodizing technique. The convex domes on the bionic sample were fabricated by compression molding under a compressive stress of 92.5 MPa. The water contact angles of the as-anodized bionic samples were measured using a contact angle meter （JC2000A） with the 3μL water drop at room temperature. The measurement of the wetting property showed that the water contact angle of the unmodi- fied as-anodized bionic alumina samples increases from 90° to 137° with the anodizing time. The increase in water contract angle with anodizing time arises from the gradual formation of hierarchical structure or composite structure. The structure is composed of the micro-scaled alumina columns and pores. The height of columns and the depth of pores depend on the ano- dizing time. The water contact angle increases significantly from 96° to 152° when the samples were modified with self-assembled monolayer of octadecanethiol （ODT）, showing a change in the wettability from hydrophobicity to su- per-hydrophobicity. This improvement in the wetting property chemical modification. is attributed to the decrease in the surface energy caused by the

关键词： bionic surface superhydrophobicity aluminum alloy anodizing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The effect of anodizing temperature on the structure and electrical properties of Al-Ti composite oxide film

引用

Science China(Technological Sciences) 2005年第6期48卷 612-621页

作者： CHEN Jinju YANG Bangchao JIANG Meilian FENG Zhesheng School of Micro-electronics and Solid Electronics University of Electronics Science and Technology of ChinaChengdu 610054China

The Al-Ti composite oxide films with high dielectric constant were prepared by hydrolysis precipitation and anodizing. The growth, structure and electrical properties of the Al-Ti composite oxide films formed at different anodizing temperatures from 25℃ to 85℃ have been studied by dissolution of anodic oxide films, Auger electron spectroscopy (AES), and electrical measurements. With the anodizing temperature increasing, the film growth rate increases, the structure of two layers in the Al-Ti composite oxide film converts into three layers, I-V characteristics change evidently, and the specific capacitance achieves a peak value at about 75℃. The local breakdown in the composite oxide films formed at 50℃ occurs obviously, which may be contributed to the lowest leakage current and the highest withstanding voltage.

关键词： anodizing temperature Al-Ti composite oxide film structure electrical properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

ENVIRONMENTAL FRIENDLY anodizing ON AZ91D MAGNESIUM ALLOYS AND COATING CHARACTERISTICS

引用

Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 411-415页

作者： A. Saijo M. Hino M. Hiramatsu T. Kanadani Hori Metal Finishing Industry Co. Ltd. Abe Ochiai-cho Takahashi-shi Okayama 716-0061 Japan Industrial Technology Research Institute of Okayama Prefecture Haga Okayama-sh i Okayama 701-1296 Japan Industrial Technology Research Institute of Okayama Prefecture Haga Okayama-sh i Okayama 701-1296 Japan Graduate School of Okayama University of Science Ridai-cho Okayama-shi Okayam a 700-0005 Japan

An environmental friendly anodizing treatment (Anomag) from a phosphate-based so lution without heavy metals on AZ91D magnesium alloy was studied. The characteri stics of the coatings, such as structure, composition and corrosion resistance w ere investigated. The effects of this anodizing treatment on the mechanical prop erties were examined. X-ray diffraction (XRD) analysis revealed that the structu re of the coatings is amorphous or glassy. In salt spray tests coatings with an average thickness of 10μm had an anticorrosive performance of over 1000 hours. Fatigue tests revealed that anodizing onto AZ91D magnesium alloy does not affect the fatigue strength. These results demonstrate the utility of this anodizing t reatment on magnesium alloy for application as a structural material, such as in the automotive field.

关键词： magnesium alloy anodizing environmental friendliness

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improvement of Bonding Strength of AZ31B Magnesium Alloy by anodizing and Chromium-free Conversion Treatments

引用

Journal of Wuhan University of Technology(Materials Science) 2013年第4期28卷 808-812页

作者：赵旭辉 ZHANG Xiaofeng TANG Yuming 左禹 College of Materials Science and Engineering Beijing Key Laboratory of Electrochemical Process and Technology for Materials Key Laboratory of Carbon Fiber and Functional Polymers of Ministry of Education Beijing University of Chemical Technology

The influences of chromium-free chemical conversion treatment and anodizing treatment on bonding strength of AZ31 magnesium alloy were studied by lap-shear test, SEM and electrochemical methods. Both chemical conversion treatment and anodizing can increase the bonding strength. The anodizing treatment gives higher bonding strength and better corrosion resistance than chemical conversion treatment. The increase of bonding strength by the treatmetlts may be attributed to the uneven surface structures with micro-pores, resulting in increased bonding areas and the embedding effect.

关键词： magnesium alloy adhesive bonding chemical conversion treatments anodizing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis and characterization of salt-impregnated anodic aluminum oxide composites for low-grade heat storage

引用

International Journal of Minerals,Metallurgy and Materials 2020年第1期27卷 112-118页

作者： Bengisu Yilmaz Behiye Yüksel Gökhan Orhan Devrim Aydin Zafer Utlu stanbul University-Cerrahpasa Faculty of EngineeringDepartment of Metallurgy and Materials EngineeringIstanbul 34320Turkey Istanbul Gedik University Department of Mechanical EngineeringIstanbul 34876Turkey Eastern Mediterranean University Faculty of EngineeringDepartment of Mechanical EngineeringMersin 10Turkey

Thermochemical heat storage(THS)systems have recently attracted a lot of attention in research and development.In this study,an anodic aluminum oxide(AAO)template,fabricated by a two-step anodization method,was used for the first time as the matrix material for a THS system.Different salts were studied as thermochemical materials for their suitability in low-grade heat storage application driven by solar energy for an open system.Compositions were prepared by absorbing CaCl2,MgCl2,LiCl,LiNO3 and mixtures of these salts under a vacuum in an AAO matrix.Field Emission Scanning Electron Microscopy was used to examine the morphology of the produced AAO composites.Thermal energy storage capacities of the composites were characterized using a differential scanning calorimeter.Characterization analysis showed that anodized Al plates were suitable matrix materials for THS systems,and composite sorbent prepared with a 1:1 ratio LiCl/LiNO3 salt mixture had the highest energy value among all composites,with an energy density of 468.1 k J·kg-1.

关键词： thermal energy storage salt impregnation thermochemical heat storage anodizing salt in matrix

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study of corrosion protection of the composite films on A356 aluminum alloy

引用

Journal of Rare Earths 2011年第10期29卷 991-996页

作者：孙焕焕王辉孟凡玲 School of Materials Science and Engineering Shenyang Ligong University Norsom Press Shop Shanghai GM(Shenyang) Norsom Motors Company Limited

Composite films were fabricated on A356 aluminum alloy by combined anodizing and rare earth deposition. The corrosion protection effect and corrosion behavior of the composite films in 3.5% NaCl solution were studied by electrochemical impedance spectroscopy （EIS）. SEM observation indicated that the rare earth Ce film completely sealed the porous structure of the anodic film, and the composite films composed of anodic film and Ce film were compact and integrated. According to the characteristics of EIS, the EIS plots of the compos- ite films at different immersion times were simulated using the equivalent circuits of Rsol（QceRce）（QaRa）, Rsol（QceRce）（QpRp）（QbRb） and Rsoj（QpRp）（QbRb） models, respectively. The test results showed that the Ce film at the outer layer of the composite films had good protection effect at the initial stage of the immersion corrosion. It effectively helped the anodic film at the inner layer to prevent chloride irons from penetrating the aluminum alloy matrix. After 18 days, the Ce film lost its anticorrosive property, and the anodic film took the leading role of the corrosion protection. When the corrosion time was up to 42 days, the aluminum matrix was not corroded yet. Thus, the higher protection degree of the composite films for A356 aluminum alloy was attributed to the synergism effects of anodic film and rare earth Ce film.

关键词： aluminum alloy anodizing rare earth Ce film EIS corrosion resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Palladium Nanoparticles on Photocatalytic Characteristics of N doped Titania Catalyst

引用

Journal of Materials Science & Technology 2015年第6期31卷 664-669页

作者： Jong-Ho Lee Jeong-Il Youn Young-Jig Kim Han-Jun Oh Department of Chemistry Hanseo University School of Advanced Materials Engineering Sungkyunkwan University Department of Materials Science Hanseo University

To improve the photocatalytic efficiency of TiO2nanotubular catalyst,N doped and Pd decorated titania nanotubes was successfully synthesized via anodizing,hydrazine hydrate treatment and photoreduction of Pd ions.The small Pd nanoparticles were precipitated on TiO2nanotubes through photoreduction of Pd ions,and its distribution is relatively homogeneous.From X-ray photoelectron spectrometry（XPS） result,the N 1s spectrum represents two peaks with binding energy at 399.7 and 400.7 eV,which suggests that the nitrogen elements doped by hydrazine hydrate treatment are located in interstitial sites of the TiO2crystalline structure.For N doped TiO2nanotubes with Pd particles,a high photocurrent was detected due to increase of interface charge carrier separation rate.Moreover,N doped and Pd decorated TiO2nanotubes exhibited much higher dye destruction efficiency and rate constant due to the synergistic effect of the N dopant and the Pd deposition on TiO2nanotubes.

关键词： Pd nanoparticle Titania nanotube anodizing Dye dec

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：