Relevant bibliographies by topics / Anodizing process

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  2. Dissertations / Theses
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Academic literature on the topic 'Anodizing process'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Anodizing process"

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Rattanasatitkul, Aunyanat, Suksan Prombanpong, and Pongsak Tuengsook. "An Effect of Process Parameters to Anodic Thickness in Hard Anodizing Process." Materials Science Forum 872 (September 2016): 168–72. http://dx.doi.org/10.4028/www.scientific.net/msf.872.168.

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The anodizing process is an aluminum surface treatment process which an aluminum oxide film forms on an aluminum substrate. Typically, the anodic thickness is a required specification which depends upon current density and anodizing cycle time. In addition, another important factor is ramp time which must be proper set to prevent a burn defect. Thus, this paper investigates a relationship among these three factors to determine the setting condition which minimizes the anodizing cycle time. Moreover, the required thickness must be obtained without increasing the burn defect rate. The experimental design technique is proposed to achieve this goal and it is found that the current of 35 amp, ramp time of 340sec and anodizing time at 1400 sec ensure the obtained anodic thickness greater than 30 micron.
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Torng, Chau Chen, Chi Kong Huang, and Hsien Ming Chang. "Reliability Evaluation for Aerospace Anodizing Process of Aluminum." Materials Science Forum 638-642 (January 2010): 419–24. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.419.

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Detail parts of airframe should have higher precision and lightweight to satisfy the requirements of safety, payload, and controllability. Due to requirement of lightweight, aluminum alloy is widely used in airframe parts. Anodizing process is an important surface treatment process uses to prevent corrosion in aluminum parts. Salt spray is the critical test to verify the anodizing process of aluminum alloy and ensure the corrosion resistance can meet the requirement of specification. This study collects the failure time of salt spray and uses statistical method to construct the suitable probability distribution of those failure data. Furthermore, analyzes the failure time of salt spray and evaluate the reliability of anodizing process. Thereby the process control engineer can use the concept of reliability to monitor the anodizing process.
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Xiong, Zhong Ping, Yu Jun Si, and Min Jiao Li. "Analysis on the Anodizing Process of AZ31 Magnesium Alloy in an Environmental Friendly Alkaline Electrolyte." Applied Mechanics and Materials 665 (October 2014): 128–31. http://dx.doi.org/10.4028/www.scientific.net/amm.665.128.

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AZ31 magnesium alloy was anodized in an environmental friendly electrolyte containing 50 g/l NaOH + 40 g/l Na2B4O7·10H2O + 60 g/l Na2SiO3·9H2O. The voltage transient was recorded in anodizing process. The surface morphology of anodizing film was examined by SEM. The corrosion resistance of the anodizing film was characterized by electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The results show that the anodizing process can be divided to four stages according to the voltage transient. The anodizing film obtained at a current density of 20 mA·cm-2 for 15 minutes has the optimum corrosion resistance.
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Juyana, A. Wahab, and Mohd Nazree Derman. "Characterization of Porous Anodic Aluminium Oxide Film on Aluminium Templates Formed in Anodizing Process." Advanced Materials Research 173 (December 2010): 55–60. http://dx.doi.org/10.4028/www.scientific.net/amr.173.55.

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A porous anodic aluminium oxide (AAO) films were successfully fabricated on aluminium templates by using anodizing technique. The anodizing process was done in the mixed acid solution of phosphoric acid and acetic acid. The growth, morphology and chemical composition of AAO film were investigated. During the anodizing process, the growth of the oxide pores was strictly influenced by the anodizing parameters. The anodizing was done by varying the voltage at 70 V to 130 V and temperature from 5 °C to 25 °C. The electrolyte concentration was remaining constant. In this study, all the samples were characterized using scanning electron microscope (SEM) and X-ray diffraction (XRD) techniques. From this study, the optimum parameters to obtain porous AAO film with the mixture of phosphoric acid and acetic acid solution can be known.
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Ma, Yan Long, and Yi Liao. "Visual Detection of Machining Damage on Aerospace Aluminium Alloys during Manufacturing Process." Applied Mechanics and Materials 252 (December 2012): 302–5. http://dx.doi.org/10.4028/www.scientific.net/amm.252.302.

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In aerospace industry, chromic acid anodizing (CAA) has been traditionally used as a non-destructive testing (NDT) technique to detect flaws in aluminium alloys. However, with the increasing restriction on the use of chromic acid and the application of lithium-containing aluminium alloys to aircraft structures, the capability of anodizing as a NDT method is challenged. In this work, machining damage was deliberately introduced to an Al-Li-Cu alloy AA2099-T8. Then, the visibility of the machine damage after tartaric-sulphuric acid anodizing (TSAA), which is an environmentally friendly anodizing process, was studied. It is suggested that, with proper lighting condition, it is possible to replace CAA with TSAA for detecting machining damage on lithium-containing aluminium alloys during manufacturing.
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Luo, Sheng-lian, Lei Dai, Hai-hui Zhou, Li-yuan Chai, and Ya-fei Kuang. "New anodizing process for magnesium alloys." Journal of Central South University of Technology 13, no. 2 (April 2006): 141–45. http://dx.doi.org/10.1007/s11771-006-0145-y.

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Tsuchiya, Shoichi. "Applied technology in aluminum anodizing process." Journal of Japan Institute of Light Metals 70, no. 11 (November 15, 2020): 530–35. http://dx.doi.org/10.2464/jilm.70.530.

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Setyarini, Putu Hadi, and Purnomo. "Molarity Relationship of Electrolyte Solution to Aluminum Anodizing Process on Morphology and Corrosion Resistance." Materials Science Forum 961 (July 2019): 91–96. http://dx.doi.org/10.4028/www.scientific.net/msf.961.91.

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One type of aluminum that has a widely use is AA 6061 because it has a good mechanical properties and corrosion resistance when compared to the other types of aluminum. Those properties of this alloy can be improved even better by using the anodizing process. In this study, the results of anodizing AA 6061 will be investigated using molarity of sulfuric acid 1, 2 and 3 M, with an anodizing processing time of 60 minutes and temperature of electrolyte solution 10°C towards morphology and corrosion rate. The cathode used in this process is titanium alloy. After the anodizing process was completed, a Scanning Electron Microscopy (SEM) test was carried out to examine the surface morphology produced, testing Energy Dispersive X-Ray (EDX) is used to determine the chemical composition of the anodic layer formed after the anodizing process and the test of corrosion rate is done using 128N Autolab PGSTAT Potentiodynamic in 3.5% sodium chloride. From the test results, it appears that there is an increase in pore size and corrosion rate along with an increase in the molarity of the electrolyte solution. In addition, there is also an increase in sulfate levels and a decrease in titanium deposits in anodizing results with higher solution molarity.
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Voon, C. H., Mohd Nazree Derman, U. Hashim, and K. R. Ahmad. "Effect of Anodizing Voltage on the Growth Kinetics of Porous Anodic Alumina on Al-0.5 wt% Mn Alloys." Advanced Materials Research 795 (September 2013): 56–59. http://dx.doi.org/10.4028/www.scientific.net/amr.795.56.

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In this study, the effect of anodizing voltage on the current density versus time transient, oxide mass and the current efficiency of anodizing of aluminium manganese alloy was reported. It was found that the anodizing voltage facilitated the pore nucleation process and increased the steady state current density. However, when the anodizing voltage is 70V, dielectric breakdown occurred. The current density versus time transient for anodizing conducted at 30 to 60 V were typical while the shape was unusual for anodizing conducted at 70 V. The rate of oxide growth increased as a function of anodizing voltage. The current efficiency of anodizing increased as the anodizing increased from 30V to 70V.
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Eo, Jae Dong, Jingyu Kim, Yongsug Jung, Jong-Hang Lee, and Wook Bae Kim. "Effects of Two-Step Anodization on Surface Wettability in Surface Treatment of Aluminum Alloy." Korean Journal of Metals and Materials 59, no. 2 (February 5, 2021): 73–80. http://dx.doi.org/10.3365/kjmm.2021.59.2.73.

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Industrial anodizing of aluminum alloys is widely employed for various products, to improve corrosion and contamination protection as well as aesthetic appearance. At the same time, nanostructure fabrication using highly ordered porous aluminum oxides has been increasingly investigated in academic research for diverse micro-/nano applications. This approach is based on two-step anodization with limited process conditions, such as extended process time and low temperature. In this study, two-step anodizing was employed to anodize hairline-finished Al 1050 with sulfuric acid considering industrial processing conditions. The method is particularly suited for anodized products that require post-processing such as printing, dyeing and/or bonding. Porous anodized layers that were fabricated using conventional single anodizing, and twostep anodizing under identical processing conditions were compared. Variations in porosity, pore diameter, and inter-pore distance were examined in relation to the anodizing parameters, such as temperature and voltage. The results showed that two-step anodizing caused an increase in all measured pore-related measurements, and produced a much more uniform porous layer than the conventional anodizing process. Water contact angles were evaluated on the anodized surface of the previously machined hairline specimen. It was found that the water contact angles clearly decreased on the surfaces treated by two-step anodization, compared to the conventional anodizing process.
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Dissertations / Theses on the topic "Anodizing process"

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Brace, A. W. "The development of an expert system for the identification anodic coating process defects as a contribution to the dissemination of anodizing technology." Thesis, Aston University, 1995. http://publications.aston.ac.uk/15286/.

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Initially this thesis examines the various mechanisms by which technology is acquired within anodizing plants. In so doing the history of the evolution of anodizing technology is recorded, with particular reference to the growth of major markets and to the contribution of the marketing efforts of the aluminium industry. The business economics of various types of anodizing plants are analyzed. Consideration is also given to the impact of developments in anodizing technology on production economics and market growth. The economic costs associated with work rejected for process defects are considered. Recent changes in the industry have created conditions whereby information technology has a potentially important role to play in retaining existing knowledge. One such contribution is exemplified by the expert system which has been developed for the identification of anodizing process defects. Instead of using a "rule-based" expert system, a commercial neural networks program has been adapted for the task. The advantages of neural networks over 'rule-based' systems is that they are better suited to production problems, since the actual conditions prevailing when the defect was produced are often not known with certainty. In using the expert system, the user first identifies the process stage at which the defect probably occurred and is then directed to a file enabling the actual defects to be identified. After making this identification, the user can consult a database which gives a more detailed description of the defect, advises on remedial action and provides a bibliography of papers relating to the defect. The database uses a proprietary hypertext program, which also provides rapid cross-referencing to similar types of defect. Additionally, a graphics file can be accessed which (where appropriate) will display a graphic of the defect on screen. A total of 117 defects are included, together with 221 literature references, supplemented by 48 cross-reference hyperlinks. The main text of the thesis contains 179 literature references. (DX186565)
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Remešová, Michaela. "Výzkum a vývoj technologie přípravy tvrdé anodizace neželezných slitin." Doctoral thesis, Vysoké učení technické v Brně. CEITEC VUT, 2020. http://www.nusl.cz/ntk/nusl-433636.

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Práce je zaměřena na výzkum a vývoj technologie přípravy tvrdých anodických vrstev na třech různých typech neželezných materiálů a to (i) hliníkové slitině (AA1050), (ii) čistém hořčíku (99.9% Mg) a (iii) zinkové slitině (ZnTi2). Vhodnou kombinací anodizačních podmínek (napětí, proudová hustota, teplota a složení elektrolytu atd.) lze vytvářet anodické vrstvy s rozdílnými vlastnostmi. V rámci předložené práce byl prokázán vliv předúpravy a anodizačních podmínek na vzhled, morfologii, tloušťku a tvrdost vytvořených anodických vrstev. Pro zvýšení tribologických vlastností a tvrdosti byly anodické vrstvy přímo dopovány Al2O3 částicemi nebo kombinací Al2O3 a PTFE částic během anodizačního procesu. Teoretická část práce popisuje základní principy anodizace, metody používané v průmyslové praxi a v práci je také popsán technologický proces. Experimentální část je rozdělena na tři základní části. První část se věnuje anodické oxidaci hliníkové slitiny AA1050. Druhá část je zaměřena na anodizaci čistého hořčíku a poslední část je zaměřena na anodizaci zinkové slitiny ZnTi2, která není tak známá jako anodizace hliníku.
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Appusamy, Boopathy Harish, and Pavan Kumar Bonthala. "Electrochemical etching and anodizing as key stages of surface treatment of aluminium foil for electrolytic capacitor industry : Application of Electro Chemical Impedance Spectroscopy as non-destructive characterization of etched anode foil with an anodized dielectric oxide layer." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Produktutveckling, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-37858.

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In the initial stage, the sample preparation was done by using the techniques of Anodic etching and anodic forming processes where a repeated trial and error method of sample preparation headed towards making out a suitable sample set for characterization. After this step, the set of 2 different industrial samples were introduced and anodic oxide forming process was carried out in different electrolytes.    In the sample preparations, 4 different electrolytes were used 15% wt. Ammonium Adiphate, 1.5% wt. Ammonium Phosphate, 7% wt. Boric acid and 15% Penta Borate at different stages for performing the anodic oxide forming process. Minimum forming voltages of 20V to a maximum of 100V was employed in the sample preparation and to overcome the waiting time in forming the etched samples a higher current of 0.5A was used.   After the samples preparation, Electrochemical Impedance spectroscopy was used as a tool for characterising the various groups of samples and for observing the micro structures of various samples, they were fractured and the observed on the cross section by SEM.   After the analysis of the etched samples was made, an attempt to compare the results of the data of these samples to that of the 2 set of industrial samples was made and found that the resultant data wasn’t stable enough to characterize since huge scattering were occurring and whereby the simulation of the CPE circuit for the chosen circuit in the analysis was not possible.   Under the analysis, a randomly chosen industrial sample was also used and the resultant data was utilised in understanding the response of the system to different electrolytes.
Sammanfattning   Avhandlingsarbetet har genomförts på KEMET AB i samarbete med yttekniklaboratoriet vid JTH i syfte att karakterisera den etsade anodiska aluminiumfolien som grundprov med anodisering och etsning för ytbehandling.   I inledningsskedet gjordes provberedningen med användning av teknikerna för anodisk etsning och anodbildande processer där en upprepad provnings- och felmetod för provberedning ledde ut mot att utarbeta en lämplig provuppsättning med avseende på karakterisering. Efter detta steg infördes uppsättningen av 2 olika industriella prover och anodoxidbildande process utfördes i olika elektrolyter.   I provpreparaten användes 4 olika elektrolyter 15 % vikt Ammoniumadiphat, 1,5 vikt% Ammoniumfosfat, 7 vikt% Borsyra och 15 % Penta-borat vid olika steg för utförande av anodoxidbildningsförfarandet. Minimala formningsspänningar på 20V till ett maximum av 100V användes i provframställningen och för att övervinna väntetiden vid bildning av de etsade proven användes en högre ström av 0,5A.   Efter provberedningen användes elektrokemisk impedansspektroskopi som ett verktyg för att karakterisera de olika grupperna av prover och för att observera mikrostrukturerna i olika prover, de bröts och de observerades i tvärsnittet av SEM.   Efter att analysen av de etsade proverna gjordes ett försök att jämföra resultaten av data från dessa prover till den för de två uppsättningarna av industriella prover. Det är konstaterat att de resulterande data inte var stabila nog att karakterisera eftersom stor spridning inträffade och varigenom simuleringen av CPE-kretsen för den valda kretsen i analysen inte var möjlig.   Under analysen användes också ett slumpmässigt valt industriellt prov och de resulterande data användes för att förstå systemets respons till olika elektrolyter.
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Souza, Edivaldo Luis de 1968. "Emprego de material nanoestruturado sobre Ti na degradação de fármacos = Use of nanostructured titanium dioxide for treatment of pharmaceuticals." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267729.

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Orientadores: Peterson Bueno de Moraes, Christiane de Arruda Rodrigues Ragnini
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Tecnologia
Made available in DSpace on 2018-08-27T04:30:52Z (GMT). No. of bitstreams: 1 Souza_EdivaldoLuisde_M.pdf: 3079610 bytes, checksum: a78db6078a721c74f963b944bae72f47 (MD5) Previous issue date: 2015
Resumo: A sociedade e seus processos produtivos têm gerado e lançado quantidades elevadas e diversificadas de compostos orgânicos, inorgânicos e biológicos no meio ambiente. Juntamente com as emissões naturais, houve um grande acúmulo destes materiais nos diferentes compartimentos ambientais. A produção e o uso de medicamentos, como hormônios e antibióticos contribuíram muito para a ampliação deste quadro. Por serem persistentes não são totalmente metabolizados nos seres vivos e acabam sendo excretados e lançados em corpos receptores. Os mecanismos naturais de degradação e métodos de tratamento convencionais de efluentes não são suficientemente eficientes na remoção completa destes compostos; em função disso, é necessário o desenvolvimento e aplicação de tecnologias alternativas para a redução destes impactos. Entre estas tecnologias podemos citar os Processos Oxidativos Avançados (POA) que são mais eficientes para o tratamento destes tipos de efluentes. Objetivamos neste trabalho desenvolver, caracterizar e utilizar eletrodos nanoestruturados de TiO2 para a confecção de um reator fotoeletroquímico para a degradação do antibiótico amoxicilina e do citrato de sildenafil, este último, princípio ativo do medicamento Viagra®, submetidos à radiação UV e solar. Foram desenvolvidos eletrodos nanoestruturados com TiO2 sobre substrato de titânio, a partir de processos de anodização eletroquímica, na qual foram variados diferentes parâmetros que influenciaram nas características dos nanotubos de TiO2 desenvolvidos. Os nanotubos formados foram avaliados por Microscopia Eletrônica de Varredura quanto ao comprimento, espessura de parede e homogeneidade de distribuição. Testou-se contra-eletrodos de platina, Anodo Dimensionalmente Estável (ADE), níquel, aço-inoxidável 304 e 316L e obteve-se nanotubos de TiO2 com comprimentos entre 100 e 650 nm. Observou-se na maioria dos eletrodos nanoestruturados uma distribuição homogênea dos nanotubos. Visando a obtenção de nanoestruturas mais fotoativas, realizou-se cristalização por aquecimento em estufa. Na cristalização dos nanotubos, as análises de Difratometria de Raios-X evidenciaram intenso sinal no ângulo 2? próximo a 25º para todas as amostras significando que os nanotubos de TiO2 se cristalizaram na fase anatase, a qual é mais fotoativa. A degradação de amoxicilina apresentou rendimento de aproximadamente 85% em um intervalo de 4 horas de tratamento, enquanto que o rendimento na degradação do citrato de sildenafil foi de aproximadamente 88%, para um volume de amostra de 160,0 mL etanol/água destilada à 20% V/V em Na2SO4 0,1 M, concentração do fármaco de 10,0 mg L-1, lâmpada de vapor de mercúrio, WUV=13 W/m2, disposição horizontal dos eletrodos, distância de 3,0 mm entre lâmpada e ânodo de TiO2, cátodo de platina em tela, tensão de 1,5 volts, anodo de titânio nanoestruturado obtido a partir de contra-eletrodo de ADE 70%TiO2/30%RuO2 com d = 5,0 mm a 700 rpm e t = 120 min, 2 horas de tratamento. As nanoestruturas apresentaram-se com baixa resistência mecânica em relação à aplicação de valores de potencial elétrico superiores a 1,5 V. No entanto, abaixo destes valores, as estruturas de TiO2 mostraram-se altamente estáveis em relação à durabilidade. A eletrólise apresentou eficiência insignificante na degradação do fármaco citrato de sildenafil, sendo então aplicado um potencial aos eletrodos para fotoassistir ao processo fotocatalítico o qual se mostrou fortemente dependente da drenagem eletrônica
Abstract: The modern society and its production processes have generated and released high amounts of synthetic organic compounds which accumulate in different environmental compartments. The production and use of drugs such as hormones and antibiotics have greatly contributed to the expansion of this problem. Due to persistent-profile of these drugs, they are not completely metabolized and the conventional Wastewater Treatment Plants are not fully effective for the removal of these compounds. Thus, the development and application of alternative technologies is needed. In the other hand, the Advanced Oxidation Processes (AOP) has been effective for the treatment of pharmaceutical residues. This work aimed to produce, characterize and use nanostructured TiO2 electrodes and an photoelectrochemical reactor for the degradation of the antibiotic amoxicillin and sildenafil citrate, the latter, the active ingredient of Viagra©. The experiments were carried out using ultraviolet (UV) and solar radiation. Nanostructured TiO2 electrodes were developed from titanium substrate by electrochemical anodization process in which the different parameters were varied in order to verify its influence on the length, thickness and uniformity of distribution of TiO2 nanotubes formed, evaluated by Scanning Electron Microscopy. It was tested different counter-electrodes such as platinum, dimensionally stable anode (DSA), nickel, stainless-steel 304 and stainless-steel 316L and were obtained TiO2 nanotubes with lengths between 100 and 650 nm. It was observed in most nanostructured electrodes a homogeneous distribution of the nanotubes. Also, in order to obtain nanostructures more photoactive, crystallization was performed by heating in an oven. After crystallization process, analysis of X-Ray diffraction showed intense signal at 2? close to 25º for all samples, meaning that the TiO2 nanotubes were crystallized in the anatase phase which is more photoactive. Photocatalytic experiments with the Amoxicillin solution resulted in approximately 85% of degradation in 4 hours of treatment, whereas the degradation of sildenafil citrate was about 88%. The samples consisted of 160.0 mL ethanol / distilled water at 20 % V/V in 0.1 M Na2SO4, drug concentration of 10.0 mg L-1. The experimental setup consisted of a mercury vapor lamp or a solar simulator, horizontal arrangement of the electrodes and a platinum screen cathode. It was applied 1.5 volts, distance of 3,0 mm between the lamp and TiO2 nanostructured anode, obtained from the anodization using a DSA (70%TiO2/30%RuO2) counter-electrode placed at 5.0 mm, under stirring of 700 rpm over 120 minutes. The nanostructures had low strength to the application of higher electrical potential values than 1.5 V. However, below this value the TiO2 structures were more stable and with greater durability. Electrolytic process had a negligible efficiency in the degradation of sildenafil citrate; thus the applied potential was more important to help the photocatalytic process, which is strongly dependent of the electronic drainage
Mestrado
Tecnologia e Inovação
Mestre em Tecnologia
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Santos, Thais Cristina Lemes dos. "Síntese de nanotubos de TiO2 pelo processo de anodização e caracterização para aplicações fotoeletroquímicas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/165225.

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Nos últimos anos, a utilização de nanotubos (Nts) de dióxido de titânio (TiO2) têm atraído interesse tecnológico e científico de forma significativa devido às suas propriedades únicas, tais como grande área de superfície específica, alta capacidade de absorção e apresentam excelentes atividades fotoeletroquímicas e um meio para melhorar essas propriedades está relacionada ao controle da morfologia dos Nts durante a sua sintetização no processo de anodização. O objetivo desse estudo é avaliar a influência do potencial aplicado durante o processo de anodização para obtenção de Nts de TiO2, tendo em vista a utilização desses nanotubos como catalisador fotoeletroquímico. Para que houvesse a cristalização do óxido, realizou-se tratamento térmico a 400 °C ao ar, durante 3 h com taxa de aquecimento de 10 °C / min. Analisou-se a relação do potencial aplicado durante o processo de anodização com a morfologia dos nanotubos e a sua resposta fotoeletroquímica. As caracterizações foram realizadas através das técnicas de microscopia eletrônica de varredura com emissão de campo (MEV-FEG), difração de raios X (DRX), espectrofotometria no ultravioleta visível (UV-VÍS), voltametria linear e espectroscopia de impedância eletroquímica (EIE).Observou-se que o potencial de anodização exerce influência na geometria do nanotubo, isto é, no comprimento, na espessura da parede e no diâmetro, alterando a absorção de luz e, consequentemente, o desempenho fotoeletroquímico das amostras. Os resultados obtidos por espectroscopia de impedância eletroquímica mostraram pouca diferença na resistividade das amostras estudas. Contudo, as correntes desenvolvidas no ensaio de voltametria linear, indicaram que a amostra Nt30 é um fotoeletrodo promissor para formar heteroestruturas baseado em nanotubos de dióxido de titânio.
In recent years, the use of TiO2 nanotubes (Nts) has attracted technological and scientific interests in a significant way due to its unique properties, such as large specific surface area, high absorption capacity and excellent photoelectrochemical activities. One way to improve these properties is to control the nanotubular morphology during its synthesis through the anodizing process. The objective of this study is to evaluate the influence of the applied potential during the anodization process to obtain titanium dioxide (TiO2) nanotubes and applying these nanotubes as a photoelectrochemical catalyst. In order to crystallize the Nts, heat treatment was carried out at 400 ° C in air for 3 h at a heating rate of 10 ° C / min. The effect of the applied potential during the anodizing process on the morphology of the nanotubes and their photoelectrochemical response were analyzed. The characterization was carried out using scanning electron microscopy (SEM), X-ray diffraction (XRD), visible ultraviolet spectrophotometry (UV-VIS) and electrochemical impedance spectroscopy (EIS). It was observed that the anodization potential influences the geometry of the nanotubes, that is, their length, wall thickness and diameter, altering their light absorption properties; consequently, influencing the photoelectrochemical performance of the samples. The results obtained from the electrochemical impedance spectroscopy showed a slightly small difference in the charge transportation resistance of the studied samples. However, the currents developed in the linear voltammetry tests indicated that the Nt30 sample is a promising photoelectrode to apply for other applications such as heterostructures and cationic/anionic doped structures based on titanium dioxide nanotubes.
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Li, Hsin-Chun, and 李欣純. "Enhancement of osseointegration on titanium surface by anodizing process." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/xb4ctx.

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碩士
國立臺北科技大學
化學工程研究所
97
In this work, titania nanotubular were fabricated by anodizing technique. Effects of anodization condition such as the applied voltage, anodizing time and rotated the anode were investigated. It was found that, the growth rate, length and pore diameter is depending on the applied voltage. When the anode to rotate, the titanium nanotubes readily causing crack of nanotubes and turns into the structure of nanowire or nanobelt. The surface properties of titanium plays an important role in cell morphology and behaviors such as cell adhesion, migration, proliferation and differentiation. We seeded the Osteoblast-like cells on three different morphology of titania film ( flat, nanotubes and nanowires). The results indicated that the titania film with nanowires yield the best biological effects for cell adhesion and proliferation.
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Chang, Po Wei, and 張伯維. "Fabricated of nano/micro structured molds aluminum anodizing oxide process." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/54799336747401225188.

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碩士
長庚大學
機械工程學系
99
This paper reports the fabrication of dual-side nanostructured anti-reflection films for the protective layer of solar cells using anodic aluminum oxide (AAO) and infrared assisted roller embossing techniques. To emboss nanostructures on two sides of the plastic films, a template was first manufactured using an anodic aluminum oxide (AAO) process. Super purity aluminum sheets (99.999%) with a thickness of 0.25 mm were used as the substrates. The aluminum template was used to replicate the nanostructures onto 60 μm thick polyethylene terephthalate (PET) films by using a hot embossing facility in the experiments. The patterned solar cell was characterized using UV/VIS spectrophotometer, and scanning electron microscope (SEM), and its total conversion efficiency was measured by a solar simulator. The experimental results showed that the fabricated films could effectively reduce the reflectance and increase the conversion efficiency of solar cells. The proposed method shows great potential for fabrication of the anti-reflection protective layer of solar cells due to its simplicity and versatility
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Yeh, Chi-Chen, and 葉啟禎. "Heat Treatment and Pulsed Anodizing Process of ADC14 Aluminum Alloy Cast." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/cy7bk5.

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碩士
國立高雄應用科技大學
化學工程與材料工程系碩士在職專班
105
The aim of this work is to study ADC14 aluminum alloy the influence of time of pulsed hard anodizing and the temperature of heat treatment. The ADC14 castings anodized using the pulsating voltage of 35 V / 50 ms -2 V / 5 ms in the mixed-acid of H2SO4, H2C2O4 2H2O, Al2(SO4)3 Solution. The anodized film was subjected to a 5000 times reciprocating abrasion test using a Taber CS17 linear friction tester.The anodized film wear loss was 1mg. The optimum hard anodized conditions were applied to the CVT (continuous variable transmission) test. The oxidized film applied in CVT can reduce friction loss.The test result showed .When it was combined with the belt.
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WANG, WEI-YIN, and 王威尹. "Integrally colored anodizing process of A6063 aluminum alloy by pulse current." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/31666573446991027902.

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Jiu, Chang Wen, and 張文. "Study of modifiers on integrally colored anodizing process of by pulse current." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/95725859678827995081.

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Books on the topic "Anodizing process"

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Brace, Arthur william. The development of an expert system for the identification anodic coating process defects as a contribution tothe dissemination of anodizing technology. Birmingham: Aston University. Department of Mechanical and Electrical Engineering, 1995.

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

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Book chapters on the topic "Anodizing process"

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Runge, Jude Mary. "Anodizing as an Industrial Process." In The Metallurgy of Anodizing Aluminum, 149–90. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72177-4_3.

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Runge, Jude Mary. "Anodizing as a Corrosion Process." In The Metallurgy of Anodizing Aluminum, 249–80. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72177-4_5.

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Qian, Jian Gang, Di Li, and Feng Zhang. "Process of Film Formation By Anodizing AZ91D Magnesium Alloy." In Materials Science Forum, 3905–8. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-960-1.3905.

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Lee, Ji Eon, Kye Sung Kim, Young Rae Cho, Kwang Ho Kim, and Won Sub Chung. "Ti Oxide Films Formed by an Anodizing Process for Use in Dental Implants." In Solid State Phenomena, 1777–80. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.1777.

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Jamaati, R., M. R. Toroghinejad, and E. Mohammadi Zahrani. "A Low Cost Method for Manufacturing of Aluminum/Alumina Composite by Anodizing and CRB Process." In Supplemental Proceedings, 669–76. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118062173.ch85.

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Yousri, S. "AN ELECTROCHEMICAL METHOD TO CONTROL THE ANODIZING PROCESS." In Materials Performance Maintenance, 335–42. Elsevier, 1991. http://dx.doi.org/10.1016/b978-0-08-041441-6.50032-1.

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Batzias, A. F., and F. A. Batzias. "Computer Aided Neuro-fuzzy Control in Anodizing of Aluminium." In European Symposium on Computer Aided Process Engineering-12, 35th European Symposium of the Working Party on Computer Aided Process Engineering, 433–38. Elsevier, 2002. http://dx.doi.org/10.1016/s1570-7946(02)80100-6.

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López, C. Y. Torres, J. J. Pérez Bueno, I. Zamudio Torres, M. L. Mendoza-López, A. Hurtado Macías, and J. E. Urbina. "Novel Synthesis of 4nm Anatase Nanoparticles at Room Temperature Obtained from TiO2 Nanotube Structures by Anodizing Ti." In Advances in Environmental Engineering and Green Technologies, 87–115. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-6304-6.ch004.

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The scope of the chapter is showing novel experimental findings on preparing anatase TiO2 nanoparticles, first anodizing titanium into an organic media for obtaining TiO2 nanotubes, and these used as a photo catalytic active electrode in treating water polluted with organic contaminants. The substrates were grit blasted in order to obtain mechanical fixation of the generated nanotubular TiO2 structure. This was successfully achieved without diminishment of the nanotubes order and with a self-leveling of the outer surface. A new phenomenon is investigated consisting in the process of oxidation of the nanotubes in water after anodizing. Along this process, methyl orange added to the aqueous solution was discolored as part of the redox reaction involved. The final state of the modified layer was composed of conglomerates of crystalline TiO2 nanoparticles, around 4 nm in size, consisting of anatase. This was obtained under room conditions.
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López, Celeste Yunueth Torres, Jose de Jesus Perez Bueno, Ildefonso Zamudio Torres, Maria Luisa Mendoza López, Abel Hurtado Macias, and José Eleazar Urbina Álvarez. "TiO2 Nanotubes Transformation Into 4nm Anatase Nanoparticles." In Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials, 810–30. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-8591-7.ch034.

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The scope of this work shows novel experimental findings on preparing anatase TiO2 nanoparticles, first anodizing titanium into an organic media for obtaining TiO2 nanotubes, and using these as a photocatalytic active electrode in treating water polluted with organic contaminants. The substrates were grit blasted to obtain mechanical fixation of the generated nanotubular TiO2 structure. This was successfully achieved without diminishment of the nanotubes order and with a self-leveling of the outer surface. A new phenomenon has been investigated consisting of the process of oxidation of the nanotubes in water after anodizing. Along this process, methyl orange added to the aqueous solution was discolored as part of the redox reaction involved. The final state of the modified layer was composed of conglomerates of almost completely crystalline TiO2 nanoparticles, around 4 nm in size, consisting of anatase. SEM and TEM images show the transition of the amorphous nanotubes (atomic disorder/nanometric order) to crystalline disordered particles (atomic order/nanometric disorder).
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Rama Krishna, L., and G. Sundararajan. "Corrosion and Wear Protection through Micro Arc Oxidation Coatings in Aluminum and Its Alloys." In Encyclopedia of Aluminum and Its Alloys. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000207.

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This article presents the brief overview of fairly recent and eco-friendly micro arc oxidation (MAO) coating technology. The weight-cost-performance benefits in general raised the interest to utilize lightweight materials, especially the aluminum and its alloys. Despite numerous engineering advantages, the aluminum alloys themselves do not possess suitable tribology and corrosion resistance. Therefore, improvements in surface properties are essential to enable developing potential industrial applications. For improving wear and corrosion resistance of Al alloys, the most demanding surface properties are high hardness and chemical inertness. The technical and technological limitations associated with traditional anodizing and hard anodizing processes have been the strongest driving force behind the development of new MAO technology. While presenting the key technological elements associated with the MAO process, the basic mechanism of coating formation and its phase gradient nature is presented. Influence of various process parameters including the electrolyte composition has been discussed. The typical microstructural features and distribution of α- and γ-Al2O3 phases across the coating thickness as a key strategy to form dense coatings with required mechanical, tribological, and corrosion properties which are vital to meet potential application demands are briefly illustrated.
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Conference papers on the topic "Anodizing process"

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Darmawan, Agung Setyo, Tri Widodo Besar Riyadi, Abdul Hamid, Bambang Waluyo Febriantoko, and Budi Satria Putra. "Corrosion resistance improvement of aluminum under anodizing process." In HUMAN-DEDICATED SUSTAINABLE PRODUCT AND PROCESS DESIGN: MATERIALS, RESOURCES, AND ENERGY: Proceedings of the 4th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5042862.

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Vagaska, Alena, Peter Michal, Miroslav Gombar, Jan Kmec, Emil Spisak, and Miroslav Badida. "Modelling of the anodizing process of aluminum using neural networks." In 2014 15th International Carpathian Control Conference (ICCC). IEEE, 2014. http://dx.doi.org/10.1109/carpathiancc.2014.6843681.

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Mércia Franca de Carvalho, Rebeka Oliveira Domingues, Andréa Gonçalves de Sousa, Ricardo Artur Sanguinetti Ferreira, and Yogendra Prasad Yadava. "Waste recycling of aluminum anodizing process for internal coating of oil refining pipes." In 23rd ABCM International Congress of Mechanical Engineering. Rio de Janeiro, Brazil: ABCM Brazilian Society of Mechanical Sciences and Engineering, 2015. http://dx.doi.org/10.20906/cps/cob-2015-2445.

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Huang, Chen-Kang, and Chih-Wei Lee. "Boiling Enhancements by Anodizing and Pre-Boiling in Nanofluid." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88552.

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Numerous methods, such as sintered or machined surface, have been proposed to enhance the boiling performance. On the other hand, nanofluids are also reported to increase the convective heat transfer and become attractive in many engineering applications. In this study, anodizing was tried to produce porous structure on the heater surface to enhance the boiling performance. Two electrolyes, phosphoric acid and oxalic acid, were used. It was found the anodized pores prepared by oxalic acid were smaller. However, the phosphoric acid anodized surface exhibited a CHF increment by 40% with almost no superheat increment. A nanofluid pre-boiling process was also proposed. An aluminum wire was used as the heater to boil nanofluid for a certain time at a certain heat flux. 0.1 wt% TiO2 nanofluid was used as the working fluid during the pre-boiling process. The wire then went on being the heater for pure water. It is found that aluminum wires exhibit boiling enhancement after preboiling in nanofluid. The most effective process heat flux and duration were found experimentally. The experimental results showed an 11° decrease of the surface superheat. According to SEM photos, two layers were deposited on the aluminum surface. The top layer is more like clusters of deposited nanoparticles, and the layer could be dissolved into water when perform subsequent pure water boiling. The other layer located beneath is more condensed and reliable. It is believed that the second layer could be the main mechanism to exhibit the boiling enhancement.
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Batalova, Malika, Balaussa Alpysbayeva, and Natalya E. Korobova. "Dependence of the Pore Wall Thickness on the Anodizing Process Parameters for Nanoporous Alumina Membranes." In 2021 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (ElConRus). IEEE, 2021. http://dx.doi.org/10.1109/elconrus51938.2021.9396213.

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Kao, Tzung-Ta, Tung-Kuan Liu, and Yu-Wei Tsai. "Optimization of anodizing process parameters for the volume expansion of anodic aluminum oxide film by taguchi method." In 2014 11th IEEE International Conference on Control & Automation (ICCA). IEEE, 2014. http://dx.doi.org/10.1109/icca.2014.6870985.

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BARA, Marek, Sławomir KULIG, and Joanna KORZEKWA. "THE INFLUENCE OF DISTANCE BETWEEN ELECTRODES USED IN ANODIZING PROCESS ON THE PROPERTIES OF ALUMINUM OXIDE COATINGS." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.904.

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Adyono, Ndaru, W. D. Lestari, and Luluk Endahwati. "Military Type III Anodizing: The Optimal Limit Within Hardening Process of Aluminium Alloy in a Near Zero Temperature." In 2nd Borobudur International Symposium on Science and Technology (BIS-STE 2020). Paris, France: Atlantis Press, 2021. http://dx.doi.org/10.2991/aer.k.210810.024.

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Franetovic, Vjekoslav, and James G. Schroth. "Improved Hot Aluminum Forming Tribology by Anodization." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44386.

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The process of Quick Plastic Forming (QPF) developed by General Motors involves hot aluminum forming at ∼450°C, and has formability advantages over conventional stamping of aluminum or steel. However, there are still no fully satisfactory solutions for the problem of local interaction/sticking between the aluminum blank and the tool, and the eventual transfer of some aluminum to the steel tool after repeated forming cycles. In this paper we show that the process of anodizing aluminum prior to forming greatly diminishes the interaction of aluminum with steel at QPF forming temperatures. Significantly improved tribological behavior of the aluminum surface after anodization as compared to lubricated aluminum was shown on a laboratory scale with flat-on-flat reciprocating experiments.
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Ribeiro, A., C. Vilarinho, J. Araújo, and J. Carvalho. "Development of an Integrated Process for Eggshell Valorization." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38836.

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The current global trend towards more stringent environmental standards, technical applicability and cost-effectiveness, became key factors in the selection of adsorbents. After demonstrating the performance of eggshell-derived adsorbent under a range of lab operating conditions, this work focused the adsorption efficiency of calcined eggshell powder (CEP), in the treatment of wastewaters from different industrial units. In order to do it, the removal of organic material, expressed as chemically oxygen demand (COD), was monitored in leachate wastewaters from sanitary landfill (LLWW) and in municipal residual wastewaters (MWW). Furthermore, the efficiency of alkaline metals removal, specifically from effluents of industrial unites from superficial treatments, was also assessed. A detailed study of the eggshell characteristics, before and after the adsorption process, was carried out, aiming at investigate the adsorption mechanism underlying the removal of different pollutants. Results demonstrate that adsorption of organic material and metals in the CEP, go around 84% of organic material removal in MWW and 81% in LLWW. Finally, a removal of 95% of aluminium (Al) from MWW, deriving from anodizing industrial plant, and a removal of 88% copper (Cu), 95% chromium (Cr) and 30% nickel (Ni) from effluents of superficial treatments produced in Ni/Cr plating plants, were also determined This suggests that CEP adsorbent is appropriated to wastewaters treatment with high contents of organic matter and heavy metals, from different aqueous systems or different industries. The application of this adsorbent in this methodology showed good cost-benefits ratio, proving that it can be an effective alternative to activated carbon. However, aiming the progress and sustainability of the whole eggshell valorisation, we are further optimizing, testing and developing new techniques and products to recover the organic fraction of the eggshell through the reclamation of several bioactive peptides derived from hydrolysis of different proteins that constitute these residues. These products are intended to be introduced in the food, cosmetic and pharmaceutical markets.
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