Relevant bibliographies by topics / Aluminum Anodic oxidation Technique

Academic literature on the topic 'Aluminum Anodic oxidation Technique'

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Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Aluminum Anodic oxidation Technique"

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Klakurková, Lenka, Martin Juliš, and Pavel Gejdoš. "Analysis of Causes of Baby Stroller Construction Damage." Defect and Diffusion Forum 405 (November 2020): 179–84. http://dx.doi.org/10.4028/www.scientific.net/ddf.405.179.

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The paper deals with the complaint between the manufacturer and the customer. The object of the dispute is a damaged stroller construction made by welding Al-Mg-Si aluminum alloy profiles with the final surface layer produced by anodic oxidation. The aim of the analysis is to identify clearly the causes of breaking the aluminum structure using fractographic and metallographic techniques.
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Elkais, Ali, Milica Gvozdenovic, Branimir Jugovic, Tomislav Trisovic, Miodrag Maksimovic, and Branimir Grgur. "Electrochemical synthesis and corrosion behavior of thin polyaniline film on mild steel, copper and aluminum." Chemical Industry 65, no. 1 (2011): 15–21. http://dx.doi.org/10.2298/hemind100901069e.

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The electrochemical synthesis of polyaniline (PANI) on mild steel, aluminum and copper from the sodium benzoate solutions has been investigated. It has been shown that thin, highly adherent, polyaniline films on the investigated metals could be obtained by anodic oxidation with current densities in the range of 0.5 and 1.5 mA cm-2. The corrosion behavior of mild steel, aluminum and copper with polyaniline coating in 0.5 mol dm3 NaCl (pH 3) solutions, has been investigated by polarization technique. The corrosion current densities, porosity and protection efficiency was determined. It has been shown that polyaniline coating provided corrosion protection of all mentioned metals.
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Lv, Peng Xiang, Guan Xin Chi, Dong Bo Wei, and Shi Chun Di. "Design of Scanning Micro-Arc Oxidation Forming Ceramic Coatings on 2024 Aluminium Alloy." Advanced Materials Research 189-193 (February 2011): 1296–300. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.1296.

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Micro-arc oxidation (MAO), also called plasma electrolytic oxidation (PEO), anodic spark deposition (ASD), or micro-arc discharge oxidizing (MDO), is an effective surface treatment technique which come from anodic oxidation technology. Via increasing the anodic voltage breaking through faraday area to a high stage accompanied by micro-arc discharge phenomenon, It indicated the ceramic coatings thickness increase along with the scanning times increase, while the thickness increment reduces. The phase composition, morphology and element distribution was studied by X-ray diffraction, scanning electron microscopy and line scanning. The morphology of the ceramic coatings shows it divided into compact layer and loose layer. And it composes of α-Al2O3 and γ-Al2O3.
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Park, Ilhwan, Carlito Tabelin, Hiroyuki Inano, Kensuke Seno, Kazuki Higuchi, Mayumi Ito, and Naoki Hiroyoshi. "Formation of surface protective coatings on arsenopyrite using Al-catecholate complex and its mode of inhibition of arsenopyrite oxidation." MATEC Web of Conferences 268 (2019): 06015. http://dx.doi.org/10.1051/matecconf/201926806015.

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Arsenopyrite is the most common arsenic-bearing sulfide mineral in nature. It is readily oxidized and releases toxic arsenic (As) into the environment when exposed to atmospheric conditions via anthropogenic activities like mining, mineral processing, extractive metallurgy, and underground space developments. Carrier-microencapsulation (CME) is a technique that uses metal(loid)-organic complexes to selectively form protective coatings on the surfaces of sulfide minerals. In this study, CME using Al-catecholate complexes (i.e., Al-based CME) was investigated to suppress the oxidation of arsenopyrite. Aluminum(III) and catechol form three complex species depending on the pH and among them, [Al(cat)]+ was the most effective in suppressing arsenopyrite oxidation. Its suppressive effect was improved as [Al(cat)]+ concentration increased due most likely to the formation of a more extensive surface protective coating at higher concentrations. Surface characterization of leaching residues using SEM-EDX and XPS indicates that CME-treated arsenopyrite was covered with bayerite (γ-Al(OH)3). The results of electrochemical studies showed that the surface protective coatings suppressed both anodic and cathodic half-cell reactions of arsenopyrite oxidation.
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Zhou, Yiming, Ronghong Cui, Yujian Song, Tao Chen, Xianghong Fan, Binlin Ma, and Tianyu Zhang. "Monitoring cracks of metal structure based on grating thin-film sensor." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 39, no. 6 (December 2021): 1204–11. http://dx.doi.org/10.1051/jnwpu/20213961204.

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The hole edge of a metal structure is the most likely crack position in an aircraft structure. The quantitative monitoring of a hole-edge crack is important for structural health monitoring. Therefore, this paper presented a grating thin-film sensor based on the potentiometric method. Firstly, the anodic oxidation process was used to prepare thin film on 2A12-T4 aluminum alloy matrix to prevent the aluminum alloy matrix from interfering with the monitoring signal of the sensor. Then the DC superimposed pulsed bias arc ion plating technique was used to prepare the grating thin-film sensor on the surface of the specimen. The output characteristics of the grating thin-film sensor are obtained with its finite element model, and the factors affecting the sensitivity of the sensor are analyzed. Finally, the fatigue crack monitoring tests were carried out to verify the quantitative monitoring capability of the grating thin film sensor. The experimental results show that it is feasible for the grating thin-film sensor to quantitatively monitor the fatigue crack at the hole edge of an aircraft metal structure.
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Bouznif, Sourour, and Mahmoud Bali. "Coupling of the coagulation/flocculation and the anodic oxidation processes for the treatment of textile wastewater." Journal of Water Supply: Research and Technology-Aqua 70, no. 4 (March 30, 2021): 587–99. http://dx.doi.org/10.2166/aqua.2021.166.

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Abstract The increased demand for textile products leads to an increase in the quantity of wastewater discharged. It becomes indeed one of the most critical health and environmental problems in the world. The main challenge, therefore, is to develop innovative techniques for treating this wastewater with low production costs and better efficiency. The major objective of this work was to investigate the efficiency of the coupling of the coagulation–flocculation and the anodic oxidation processes on the platinum electrode in the removal of organic, mineral, and microbial pollution contained in textile effluents. A series of experiments is carried out on samples prepared in the laboratory, in which the textile effluent was mixed with a secondary effluent from an urban wastewater treatment plant. The treatment consists of two steps: a coagulation–flocculation process using aluminum salts as a coagulant and an anodic oxidation on the platinum electrode using photovoltaic panels for the production of electric current. The treatment at optimized conditions reveals that the coupling of the two processes made it possible to achieve satisfactory results. The abatement rates were 95.97% for the turbidity, 90% for COD, 100% for BOD, 100% for , 53.6% for , and 100% for . The coupling of the two processes ensured the complete elimination of fecal germs. Thanks to the satisfactory results, the obtained permeate can be reused in the dyeing process in the textile industry.
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Choudhari, Khoobaram S., Chang-Hwan Choi, Santhosh Chidangil, and Sajan D. George. "Recent Progress in the Fabrication and Optical Properties of Nanoporous Anodic Alumina." Nanomaterials 12, no. 3 (January 28, 2022): 444. http://dx.doi.org/10.3390/nano12030444.

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The fabrication of a thick oxide layer onto an aluminum surface via anodization has been a subject of intense research activity for more than a century, largely due to protective and decorative applications. The capability to create well-defined pores via a cost-effective electrochemical oxidation technique onto the surface has made a major renaissance in the field, as the porous surfaces exhibit remarkably different properties compared to a bulk oxide layer. Amongst the various nanoporous structures being investigated, nanoporous anodic alumina (NAA) with well-organized and highly ordered hexagonal honeycomb-like pores has emerged as the most popular nanomaterial due to its wide range of applications, ranging from corrosion resistance to bacterial repelling surfaces. As compared to conventional nanostructure fabrication, the electrochemical anodization route of NAA with well-controlled pore parameters offers an economical route for fabricating nanoscale materials. The review comprehensively reflects the progress made in the fabrication route of NAA to obtain the material with desired pore properties, with a special emphasis on self-organization and pore growth kinetics. Detailed accounts of the various conditions that can play an important role in pore growth kinetics and pore parameters are presented. Further, recent developments in the field of controlling optical properties of NAA are discussed. A critical outlook on the future trends of the fabrication of NAA and its optical properties on the emerging nanomaterials, sensors, and devices are also outlined.
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Kim, Seung-Jun, Tae-Hyun Kim, Jeong-Ho Kong, Yongsung Kim, Chae-Ryong Cho, Soo-Hyung Kim, Deug-Woo Lee, Jong-Kweon Park, Dongyun Lee, and Jong-Man Kim. "Dual-scale artificial lotus leaf fabricated by fully nonlithographic simple approach based on sandblasting and anodic aluminum oxidation techniques." Applied Surface Science 263 (December 2012): 648–54. http://dx.doi.org/10.1016/j.apsusc.2012.09.127.

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Bruera, Florencia A., Gustavo R. Kramer, María L. Vera, and Alicia E. Ares. "Low-Cost Nanostructured Coating of Anodic Aluminium Oxide Synthesized in Sulphuric Acid as Electrolyte." Coatings 11, no. 3 (March 9, 2021): 309. http://dx.doi.org/10.3390/coatings11030309.

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The anodic oxidation of aluminium is an electrochemical technique that allows obtaining nanostructures with easily adjustable morphology depending on the synthesis variables, for its application in medicine, engineering, biotechnology, electronics, etc. In this work, low-cost aluminium oxide nanostructured films were synthesized and morphologically characterized using two anodization steps in sulphuric acid, varying the concentration and temperature of the electrolyte and anodization voltage. The order of the porous matrix, pore diameter, interpore distance, pore density, thickness, and porosity were measured and statistically analyzed. The results showed that under the proposed conditions it is possible to synthesize low-cost nanoporous aluminium oxide films, with a short-range ordering, being the best ordering conditions 10 °C and 0.3 M sulphuric acid at 20 V and 5 °C and 2 M sulphuric acid at 15 V. Furthermore, it was determined that the pore diameter and the interpore distance vary proportionally with the voltage, that the pore density decreases with the voltage and increases with the concentration of the electrolyte, and that the thickness of the oxide film increases with electrolyte concentration, temperature, and anodization voltage.
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Hermon, S., D. Grange, Y. Pellet, G. Lloret, S. Oyonarte, F. Bosch, and M. Coste. "Zero Liquid Discharge approach in plating industry: treatment of degreasing effluents by electrocoagulation and anodic oxidation." Water Science and Technology 58, no. 3 (August 1, 2008): 519–27. http://dx.doi.org/10.2166/wst.2008.690.

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Degreasing waste effluents issued from a surface treatment plant were treated by electrochemical techniques in an attempt to reduce COD so that clean water can be returned to the rinse bath. Electrocoagulation, both with iron and aluminium anodes, and anodic oxidation with boron doped diamond (BDD) anodes were tested. In the electrocoagulation tests, the nature of the anodes did not impact significantly the reduction of COD. Electrocoagulation showed good COD removal rates, superior to 80%, but it was not able to reduce COD down to low levels. Anodic oxidation was able to reduce COD down to discharge limits; the oxidation efficiency was superior to 50%. Economical calculations show that anodic oxidation is best used as a polishing step after electrocoagulation. The bulk of the COD would be reduced by electrocoagulation and, then, anodic oxidation would reduce COD below discharge limits. The maximum treatable flow is somewhat hindered by the small sizes of current BDD installation but it would reach 600 m3/year if anodic oxidation is coupled with electrocoagulation, the operational cost being 2.90 €/m3.
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Dissertations / Theses on the topic "Aluminum Anodic oxidation Technique"

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Madeleine, Teresa Catherine. "The catalytic activity of anodic oxides on aluminum." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/51935.

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The dehydration of isopropanol over anodic oxides was studied. The catalytic activity of the anodic oxides prepared in phosphoric, sulfuric, and oxalic acid was compared to the activity of ν-Al₂O₃. The effect of various thermal treatments on the catalytic activity was examined. IR spectroscopy proved useful for the study of the effect of thermal treatment on the acidity of the oxides. X-ray photoelectron spectroscopy (XPS) was employed to examine the oxide surfaces both before and after use as a catalyst. The acidity of the oxides was studied by various methods and related to the activity of the oxides. The acidity of the oxide surfaces was studied by the adsorption of pH indicators on the oxide surfaces. The adsorption of gaseous bases, ammonia and pyridine, was studied by IR spectroscopy and temperature programmed desorption mass spectrometry. It was thus possible to differentiate between Lewis and Brønsted acid sites and to determine the quantity of the acid sites on the various oxides.
Ph. D.
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Cheng, Chuan, and 程川. "Electro-chemo-mechanics of anodic porous alumina nano-honeycombs: self-ordered growth and actuation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50899582.

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Self-ordered anodic porous alumina with a nano-honeycomb structure has recently been extensively used as templates for the synthesis of various nanomaterials for diverse applications. However, due to the insufficient knowledge on the combined electro-chemo-mechanical processes, the formation mechanism of self-ordering has been under debate for decades without clear conclusions. Also, fast fabrication of highly self-ordered and mechanically stable anodic porous alumina is still a challenge. Furthermore, the actuation behavior of anodic porous alumina upon external mechanical and electrical triggering in an electrochemical cell has not been exploited. In this work, firstly, we investigated the self-ordering mechanism by establishing a kinetics model involving the Laplacian electric potential distribution and a continuity equation for current density within the oxide body. Current densities governed by the Cabrera-Mott equation are formed by ion migration within the oxide as well as across the interfaces. The pore channel growth, due to electric-field-assisted reactions, is governed by Faraday’s law. Real-time evolution of pre-patterned pore channel growth was simulated in two-dimensional cases by finite element method. The simulations revealed a parameter domain within which pre-patterned pore channels will continue to grow in a stable manner during the subsequent anodization if the pre-patterns are commensurate with the self-ordered configurations, or these are driven into stable if the pre-patterns do not initially match the self-ordered configurations. This was verified in experimentally observed pore channel growth under the guidance of pre-patterns made by focused-ion-beam milling. Furthermore, the simulations revealed that ionization reaction on (001) oriented Al grain is relatively easier than that on (101) grain, which results in stable and unstable pore channel growth on (001) and (101) Al grains, respectively, both of which were observed from the simulations and experiments. Secondly, a scheme on quantitative evaluation of self-ordering qualities in anodic porous alumina has been developed, based on which we systematically searched the optimum self-ordering conditions, by varying the key anodization factors, including substrate grain orientation, electrolyte concentration, temperature, voltage, and time. A high acid concentration and high temperature anodization method was found. Compared with conventional methods, the present method can realize fast formation of highly self-ordered, and mechanically stable anodic porous alumina under a continuous range of anodization voltage with tunable interpore distances. Thirdly, reversible bending was found in anodic porous alumina-Al composites upon cyclic electric actuation, as directly observed by an optical microscope and detected by in situ nanoindentation. The bending is thought to be the result of charge-induced surface stresses in the nanoporous alumina. The results suggest a new type of composite materials for applications as micro-scale actuators to transform electrical energy into mechanical energy. Furthermore, the composite exhibits significant softening during in situ nanoindentation when the estimated maximum stress underneath the indenter is exerted on the metal/oxide interface. Softening was further verified by in situ microindentation. Electron microscopy examination indicated that the softening is due to a combination of high compression stress and electric field acting near the interface, which enhance ionization reaction and cause the interface to move faster into the substrate.
published_or_final_version
Mechanical Engineering
Doctoral
Doctor of Philosophy
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Ng, King-yeung, and 吳競洋. "An investigation of the deformation of anodic aluminium oxide nano-honeycomb during nanoindentation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42841240.

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Wang, Shuo, and 王硕. "Tribological behaviour of anodised alumina nanohoneycombs." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B49618131.

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Anodic alumina nanohoneycombs (AAO) have been widely used because of its convenient fabrication and controllable pores’ geometry. A lot of investigations have been conducted to study its physical and chemical properties. However, the mechanical properties, especially tribological properties, of such a popular nanomaterial still remain almost unknown. In this project, a series of scratch experiments were conducted on AAO films fabricated by a two-step anodisation method. The testing system is a G200 Nanoindenter provided by Agilent Corporation. A standard diamond Berkovich tip is used as the scratch tip. A scanning electron microscope was used to image the microstructure of the material deformation after scratching. Strengths of AAO domains with different pore regularities were compared by performing the scratch tests at constant normal loads crossing the boundaries separating these domains. Ramping load tests were carried out to show the effects of the normal load on the deformation and friction of the AAO. Scratch cycles and velocities were also varied to see their influence on friction and wear. The results show that the more ordered AAO structure has higher strength than disordered counterparts under scratch testing. The friction coefficient reduces rapidly on increasing normal load, and an explanation of this unusual behaviour is offered by considering the row-by-row deformation of the AAO structure. In multicycle scratch tests, the friction reaches a maximum at the fourth cycle. A step-like deformation behaviour was observed when the scratch velocity became extremely large, and this is probably due to the dynamic response of the instrument.
published_or_final_version
Mechanical Engineering
Master
Master of Philosophy
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賴慶才 and Hing-choi Lai. "Electrochemical studies of the lithium-aluminium anode in methyl acetate." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31207650.

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Kassangana, Alain Gabriel Mbengu. "Anodized alumina as a template for nanostructure processing." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112572.

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A novel way of producing nanostructures in the past decade has been through the use of an anodized alumina template. This template has dense, self-ordered nanometric pores that grow in the oxide as the aluminum is being anodized. This technique is a fairly new method of processing nanostructures, and much study and research is presently being done to understand the formation mechanisms of the highly ordered pores. Ultra-pure aluminum foil and pure aluminium single crystal plates were anodized to create porous anodized alumina, and using it as a template to electro-deposit Nickel nanostructures. The effects different anodizing parameters have on oxide creation were studied, and the results obtained from studying the effects of substrate purity and texture of the anodized aluminum substrate on the morphology of the alumina template, through the use of X-ray diffraction and scanning electron microscopy.
Nickel nanowires were prepared by DC electrodeposition inside the porous alumina template with a gold-palladium coating serving a conductive base. The nanowires have a diameter of 65 nm, and their length depends on the deposition time. The nanowires can uphold a position perpendicular to the substrate by partially dissolving the alumina template. They also have a tendency to gather together once the template is partially removed.
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Thieme, Michael, Christa Blank, de Oliveira Aline Pereira, Hartmut Worch, Ralf Frenzel, Susanne Höhne, Frank Simon, Lewis Hilton G. Pryce, and Aleksandr J. White. "Superhydrophobic Aluminum Surfaces: Preparation Routes, Properties and Artificial Weathering Impact." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-107085.

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Among the materials that can be treated in order to impart superhydrophobic properties are many originally hydrophilic metals. For this, they must undergo a sequential treatment, including roughening and hydrophobic coating. This contribution presents various preparation routes along with various characterization methods, such as dynamic contact angle (DCA) measurements, scanning electron microscopy (SEM) and spectroscopic techniques (FT–IRRAS, XPS, EIS). Micro-rough surfaces of pure and alloyed aluminum were generated most easily by using a modifie Sulfuric Acid Anodization under Intensifie conditions (SAAi). This produces a micro-mountain-like oxide morphology with peak-to-valley heights of 2 μm and sub-μm roughness components. Additionally, micro-embossed and micro-blasted surfaces were investigated. These micro-roughened initial states were chemically modifie with a solution of a hydrophobic compound, such as the reactive f uoroalkylsilane PFATES, the reactive alkyl group containing polymer POMA, or the polymer Teflo ® AF. Alternatively, the chemical modificatio was made by a Hot Filament Chemical Vapor Deposition (HFCVD) of a PTFE layer. The latter can form a considerably higher thickness than the wet-deposited coatings, without detrimental leveling effects being observed in comparison with the original micro-rough surface. The inherent and controllable morphology of the PTFE layers represents an important feature. The impacts of a standardized artificia weathering (WTH) on the wetting behavior and the surface-chemical properties were studied and discussed in terms of possible damage mechanisms. A very high stability of the superhydrophobicity was observed for the f uorinated wet-deposited PFATES and Teflo ® AF coatings as well as for some of the PTFE layer variants, all on SAAi-pretreated substrates. Very good results were also obtained for specimens produced by appropriate mechanical roughening and PTFE coating.
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Thieme, Michael, Christa Blank, de Oliveira Aline Pereira, Hartmut Worch, Ralf Frenzel, Susanne Höhne, Frank Simon, Lewis Hilton G. Pryce, and Aleksandr J. White. "Superhydrophobic Aluminum Surfaces: Preparation Routes, Properties and Artificial Weathering Impact." Technische Universität Dresden, 2009. https://tud.qucosa.de/id/qucosa%3A26716.

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Among the materials that can be treated in order to impart superhydrophobic properties are many originally hydrophilic metals. For this, they must undergo a sequential treatment, including roughening and hydrophobic coating. This contribution presents various preparation routes along with various characterization methods, such as dynamic contact angle (DCA) measurements, scanning electron microscopy (SEM) and spectroscopic techniques (FT–IRRAS, XPS, EIS). Micro-rough surfaces of pure and alloyed aluminum were generated most easily by using a modifie Sulfuric Acid Anodization under Intensifie conditions (SAAi). This produces a micro-mountain-like oxide morphology with peak-to-valley heights of 2 μm and sub-μm roughness components. Additionally, micro-embossed and micro-blasted surfaces were investigated. These micro-roughened initial states were chemically modifie with a solution of a hydrophobic compound, such as the reactive f uoroalkylsilane PFATES, the reactive alkyl group containing polymer POMA, or the polymer Teflo ® AF. Alternatively, the chemical modificatio was made by a Hot Filament Chemical Vapor Deposition (HFCVD) of a PTFE layer. The latter can form a considerably higher thickness than the wet-deposited coatings, without detrimental leveling effects being observed in comparison with the original micro-rough surface. The inherent and controllable morphology of the PTFE layers represents an important feature. The impacts of a standardized artificia weathering (WTH) on the wetting behavior and the surface-chemical properties were studied and discussed in terms of possible damage mechanisms. A very high stability of the superhydrophobicity was observed for the f uorinated wet-deposited PFATES and Teflo ® AF coatings as well as for some of the PTFE layer variants, all on SAAi-pretreated substrates. Very good results were also obtained for specimens produced by appropriate mechanical roughening and PTFE coating.
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Наталіч, Вікторія Вадимівна, Виктория Вадимовна Наталич, Viktoriia Vadymivna Natalich, Вячеслав Іванович Перекрестов, Вячеслав Иванович Перекрестов, Viacheslav Ivanovych Perekrestov, Ганна Сергіївна Корнющенко, Анна Сергеевна Корнющенко, and Hanna Serhiivna Korniushchenko. "Отримання упорядкованої системи наноострівців нікелю за допомогою мембран анодно-окисленого алюмінію." Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/39571.

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Упорядковані масиви наноструктур металів привертають значний науковий інтерес завдяки перспективам їх використання в електроніці, оптоелектроніці, сенсорах, ультратонких моніторах. Тому дуже важливою технологічною задачею є створення універсального методу, який би дозволив отримувати впорядковані наноструктури на поверхні підкладки з можливістю контролювати їх форму, розмір, та відстань між структурними елементами.
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Сьомкіна, Олена Володимирівна. "Удосконалення електрохімічного осадження функціональних покрить міддю на сплави заліза та алюмінію." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/39104.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.17.03 – технічна електрохімія. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2018 р. Дисертацію присвячено удосконаленню технологічного процесу нанесення функціональних мідних покриттів на вироби зі сплавів заліза й алюмінію, які використовуються для підвищення електро- та теплопровідності, забезпечення надійності контактних з'єднань, надання поверхні каталітичних властивостей. Досліджено кінетику і механізм відновлення гідроксотартратного комплексу міді. Встановлено, що катодний процес протікає в області змішаної кінетики і ускладнений хімічною стадією дисоціації комплексного іона. Розроблено склад електроліту міднення, що забезпечує осадження покриттів з міцною адгезією до більш електронегативної основи. Отриманий розчин екологічно безпечний та стійкий при тривалій експлуатації. Вивчено вплив параметрів електролізу (температури, густини струму, концентрації компонентів розчину) на морфологію і якість одержуваних покриттів. Встановлено, що для поліпшення зчеплення мідного осаду з виробами зі сплавів алюмінію, необхідно створити на їх поверхні оксидну плівку з розвиненою пористою поверхнею, що задається умовами формування. Виявлено корозійні і електричні характеристики сформованих оксидів. Визначено, що додавання активуючої домішки фторид-іону до електроліту міднення сприяє більш рівномірному розподілу металу по поверхні сплавів.
Thesis for the degree of candidate of technical sciences in specialty 05.17.03 – technical electrochemistry. – National Technical University "Kharkov Polytechnic Institute", Kharkiv, 2018. The thesis is devoted to the improvement of the technological process of applying copper coatings to products made of alloys of iron and aluminum, which are intended for electrical purposes. The kinetics and mechanism of the reduction of the copper hydroxotartrate complex are studied. It is found that the cathodic process includes delayed stage of electron transfer and chemical dissociation stage of the complex ion. The composition of the electrolyte for copper deposition has been developed, which ensures the deposition of coatings with good adhesion to the electronegative base. The resulting solution is environmentally safe and stable for long-term use. The effect of electrolysis parameters on the morphology and quality of the coatings was studied. In order to improve the adhesion of the copper deposit to parts made of aluminum alloys, it is necessary to create an oxide film having a developed porous surface, which is specified by the conditions of its formation. The corrosion and electrical characteristics of the oxides formed are revealed. It is determined that the addition of the fluoride ion (as activating impurity to the electrolyte for copper plating) promotes a more even distribution of the metal over the surface of the alloys.
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Books on the topic "Aluminum Anodic oxidation Technique"

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World, Congress on Aluminum (1990 Modena Italy). Aluminium 2000: Conference proceedings, March 13-14, 1990, Hotel Raffaello, Modena, Italy. Modena, Italy: Interall, 1990.

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World, Congress on Aluminum (2nd 1993 Florence Italy). Aluminium 2000: 2nd International Congress on Aluminium 1993 : conference proceedings. Modena, Italy: Interall Publications, 1993.

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Stiles, Clare. Anodized!: Brilliant colors & bold designs for aluminum jewelry. New York: Lark Books, 2010.

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Blumenthal, Dale. Is that newfangled cookware safe? [Rockville, Md.?]: U.S Food and Drug Administration, 1990.

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Henley, V. F. Anodic Oxidation of Aluminium and Its Alloys: The Pergamon Materials Engineering Practice Series. Elsevier Science & Technology Books, 2013.

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George C. Marshall Space Flight Center., ed. The corrosion protection of 2219-T87 aluminum by anodizing. [Marshall Space Flight Center, Ala.]: National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1991.

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Artists Anodizing Aluminum: The Sulfuric Acid Process. Not Avail, 1988.

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George C. Marshall Space Flight Center., ed. The corrosion protection of aluminum by various anodizing treatments. [Marshall Space Flight Center, Ala.?]: National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1989.

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Book chapters on the topic "Aluminum Anodic oxidation Technique"

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Zaraska, Leszek, Ewa Wierzbicka, Elżbieta Kurowska-Tabor, and Grzegorz D. Sulka. "Synthesis of Nanoporous Anodic Alumina by Anodic Oxidation of Low Purity Aluminum Substrates." In Nanoporous Alumina, 61–106. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20334-8_3.

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Shanmugham, S., M. Kamaraj, S. K. Seshadri, V. P. Balaji, and S. Karthi. "Study on the Aesthetic Behavior of Anodic Oxidation in ADC12 Aluminum Alloy." In Lecture Notes on Multidisciplinary Industrial Engineering, 527–35. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9425-7_47.

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Pedeferri, MariaPia. "Titanium Anodic Oxidation: A Powerful Technique for Tailoring Surfaces Properties for Biomedical Applications." In TMS2015 Supplemental Proceedings, 515–20. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093466.ch65.

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Pedeferri, MariaPia. "Titanium Anodic Oxidation: A Powerful Technique for Tailoring Surfaces Properties for Biomedical Applications." In TMS 2015 144th Annual Meeting & Exhibition, 515–20. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48127-2_65.

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Jiexiang, Wang, Zhang Zhengfu, Sun Junsai, Huang Shiguo, Han Yamei, and Du Jiang. "The Research on Process of Impact Factors of Hard Anodic Oxidation for 6061 Aluminum Alloy." In Light Metals 2014, 343–47. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888438.ch58.

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Jiexiang, Wang, Zhang Zhengfu, Sun Junsai, Huang Shiguo, Han Yamei, and Du Jiang. "The Research on Process of Impact Factors of Hard Anodic Oxidation for 6061 Aluminum Alloy." In Light Metals 2014, 343–47. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48144-9_58.

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Lugovskoy, Alex, and Lyubov Snizhko. "Plasma Electrolytic Oxidation (PEO) Coatings on Aluminum Alloys: Kinetics and Formation Mechanism." In Encyclopedia of Aluminum and Its Alloys. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000242.

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In this review, the main kinetics and mechanism regularities of plasma electrolytic oxidation (PEO) of aluminum alloys are discussed. The material and heat balances of the PEO process, including anomalous gas evolution and possible thermochemical reactions are presented for the first time. Side effects accompanying spark discharges from both the surface and the electrolyte sides are analyzed. The influences of electrical regime (direct, alternative, and pulse current) on the rate of coatings growth are summarized from the electrochemical point of view. Different modes of anodic polarization and electrolyte composition (alkaline solutions with inorganic polymers and dispersed constituents) are discussed in the applicative aspect.
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Hebert, K. R. "Kinetics of Anodic Oxidation of Aluminum and Titanium: Formation of Porous Alumina and Titanium Oxide Nanotube Layers." In Encyclopedia of Interfacial Chemistry, 267–83. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-409547-2.13628-5.

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Conference papers on the topic "Aluminum Anodic oxidation Technique"

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Prussin, S., David G. Seiler, Alain C. Diebold, Robert McDonald, C. Michael Garner, Dan Herr, Rajinder P. Khosla, and Erik M. Secula. "The Continuous Anodic Oxidation Technique." In CHARACTERIZATION AND METROLOGY FOR NANOELECTRONICS: 2007 International Conference on Frontiers of Characterization and Metrology. AIP, 2007. http://dx.doi.org/10.1063/1.2799383.

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Dumitrascu, Valentin. "CHARACTERIZATION OF NANOPOROUS ALUMINUM OXIDE LAYERS OBTAINED BY CONTROLLED ANODIC OXIDATION." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/61/s24.006.

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Shingubara, Shoso, Yusuhiko Murakami, Hiroyuki Sakaue, and Takayuki Takahagi. "Aluminum nanodot array formed by anodic oxidation and its conduction properties." In Integrated Optoelectronics Devices, edited by Manijeh Razeghi and Gail J. Brown. SPIE, 2003. http://dx.doi.org/10.1117/12.479609.

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Shingubara, Shoso, Yusuhiko Murakami, Kazunori Morimoto, Wu Guang Ri, and Takayuki Takahagi. "ALUMINUM NANODOT ARRAY FORMED BY ANODIC OXIDATION AND ITS CONDUCTION PROPERTIES." In 2002 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2002. http://dx.doi.org/10.7567/ssdm.2002.d-6-4.

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Yuferov, Yuliy, Alexander Arnautov, Andrey Shak, and Askold Beketov. "Forming complex geometry of nanopore by anodic oxidation of aluminum by pulsation method." In PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2018): Proceedings of the V International Young Researchers’ Conference. Author(s), 2018. http://dx.doi.org/10.1063/1.5055186.

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Degtyar, L. A., K. V. Ovchinnikova, I. Y. Zhukova, and A. A. Kuts. "ANODIC PROCESSES DURING ELECTRODEPOSITION OF NICKEL, ITS ALLOYS AND COMPOSITE COATINGS." In INNOVATIVE TECHNOLOGIES IN SCIENCE AND EDUCATION. DSTU-Print, 2020. http://dx.doi.org/10.23947/itno.2020.185-188.

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The results of investigations of the anodic processes of electrodeposition of nickel, nickel-boron alloy, composite coatings nickel-ultrafine diamond and nickel-cobalt-aluminum oxide are presented. It was shown that the oxidation of the boron-containing additive occurs at potentials much more positive than the oxidation potential of nickel, which means that oxidation of the boron compound is impossible under real conditions of electrodeposition. During the electrodeposition of CEC, the anode process proceeds without any complications and the dissolution of the anodes occurs in the same way as in nickel-plating electrolytes, and the composite additives of UDD and Al2O3 do not affect the anodic processes.
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Abdollahzadeh, M., N. Parvaini-Ahmadi, and F. Nasirpouri. "The Effect of Duration of First and Second Anodization Steps on the Ordering of Nanopores in Anodic Aluminum Oxide Templates Achieved by Three Step Anodic Oxidation Process." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70224.

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We report on the enhancement of naturally-occurred self ordering of nanopores in anodic aluminium oxide (AAO) membrane by performing three-step anodic oxidation process. Naturally-occurred self ordering of nanopores in anodic aluminium oxide (AAO) membrane has brought it into the applications of template for fabrication of nanoscale materials. Three-step anodic oxidation method was used to achieve self-ordering of nanopores. The effect of duration of first and second steps on the ordering of nanopores was investigated. The current-time curves recorded during anodization elucidate an almost same behavior for all three steps. Scanning electron micrographs (SEM) show hexagonally arranged 45 nm pores in a manner which contribute into the formation of highly ordered areas, called domains. Larger ones are clearly observed over the surface, for samples with longer first and second anodization steps.
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Sakata, K., K. Tagomori, N. Sugiyama, M. Takenouchi, Y. Shinya, and Y. Suzuki. "Development of Nano-Porous Alumina Catalyst Support by Anodic Oxidation of Thermally and Kinetically Sprayed Aluminum Coatings." In ITSC 2012, edited by R. S. Lima, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, A. McDonald, and F. L. Toma. ASM International, 2012. http://dx.doi.org/10.31399/asm.cp.itsc2012p0287.

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Abstract In order to minimize environmental burden, green technologies should be important in the 21st century. High-performance catalyst layer would make significant contribution through reforming of hydrocarbon fuels, removal of toxic molecules such as CO and NH3 from exhaust gas, reduction of nitrogen oxide (NOx) formation in combustion, and efficient conversion of chemical energy to thermal energy in small scales. Among various kinds of catalyst support, nano-porous alumina (Al2O3) developed with anodic oxidation of aluminum (Al) layers attracts much attention due to its extremely-large specific area, easy controllability of porosity and coating thickness, and large bond strength with the substrate. In our previous studies, we have developed a micro-scale catalytic combustor with a palladium (Pd) /nano-porous Al2O3 catalyst layer, aiming at micro thermophotovoltaic power generation system, which could realize higher energy density than Li-ion batteries. In this paper, we use kinetic- and plasma-spraying for the deposition of Al, and examine the effect of the Al deposition methods on the nano-pore density. It is found that a large number of dislocations in the kinetically sprayed Al particle provide much higher nano-pore density by anodic oxidation. It is also found that nano-porous Al2O3 layer kinetically sprayed and anodized has better characteristics as the catalyst support.
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Jeon, Sung Il. "A Study on Formation of Anodic Oxidation Film on Type 60 Aluminum Alloy Followed by Difference of Preprocessing." In Mechanical Engineering 2015. Science & Engineering Research Support soCiety, 2015. http://dx.doi.org/10.14257/astl.2015.108.06.

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Ota, Masahiro, Yu-ichi Watanabe, and Moriyoshi Sakamoto. "Laser Opto Microactuators Rotated by Molecular Gas Dynamics Effects." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0298.

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Abstract In this paper, a selective optical absorber plate and an anodic oxidation alumina are proposed for the rotor of an opto microactuator used as an actuator in a micromachine. The thin films of the selective optical absorber plate are fabricated by vacuum deposition. The substrates used are pyrex glass at the first stage and aluminum at the second stage. Deposition on the pyrex glass substrates is carried out in order to estimate the deposition rate and determine the characteristics of the deposited films. Germanium and silicon oxide are selected as the materials for the selective optical absorber thin films. Germanium is used as to absorb the visible beam from a laser generator. In contrast, silicon oxide is used because it has a small reflectance for visible light. The selective optical absorber-plates for the rotors of the opto microactuator consist of aluminum substrates on which germanium thin films and silicon oxide thin films are deposited. A germanium film is deposited on an aluminum substrate first and then a silicon film is deposited on the germanium film. Therefore, the rotor surface has a small reflectance for visible light and a large reflectance for infrared light. The surface with the deposited films is called the front surface and the opposite surface is called a rear surface. The rear surface is an aluminum plate with the anodic oxidation alumina film for low heat conductivity, large emissivity and thermal insulation. The insulated rotors can keep the temperature difference by greater than 10 Kelvin, even if the irradiation times are longer than 200 seconds. There are 3 reasons why the insulating rotor can keep the temperature difference. They are occurrence of a contact resistance, an increase of a surface area and a small heat conductivity of anodic oxidation alumina.
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