Bibliografie tematiche / Galvanizing process

Letteratura scientifica selezionata sul tema "Galvanizing process"

Autore: Grafiati
Pubblicato: 8 giugno 2024

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Articoli di riviste sul tema "Galvanizing process":

1

Cai, Xing Fu, Yong Zhi Huang, Yun Gang Li e Li Na Zhao. "Production Process and Technology Development of Hot-Dip Galvanizing". Applied Mechanics and Materials 488-489 (gennaio 2014): 61–65. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.61.

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Abstract (sommario):
Development process of Hot-dip galvanizing technology and characteristics of different production methods were reviewed in this paper. Presently, the UEC method was utilized widely because of its advantages like high output, high quality, energy saving, lower consumption and low products cost. To improved the corrosion resistance of the coating and declining the cost of hot-dip galvanizing, hot-dip galvanizing alloyed coating has been developed. Although the general hot-dip galvanizing has been developed rapidly in China, we should make great efforts to research deeply and improve the hot-dip galvanizing technology, especilly in the areas such as zinc alloy plating and the corresponding hot-dip galvanizing technology.
2

Kopyciński, Dariusz, e Edward Guzik. "Intermetallic Phases Formation in Hot Dip Galvanizing Process". Solid State Phenomena 197 (febbraio 2013): 77–82. http://dx.doi.org/10.4028/www.scientific.net/ssp.197.77.

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The study describes the mechanism of structure formation in protective coating, growing on iron surface during hot-dip galvanizing. As a first stage of the galvanizing process, immediately after the iron sample has been dipped in galvanizing bath, a layer of frozen zinc is crystallizing on the sample surface. Next, as a result of isothermal solidification, an alloyed layer of the coating; composed of the sub-layers of intermetallic Fe-Zn phases, is formed. At the initial stage of the existence of the alloyed layer, another layer, that of undercooled liquid, is formed on the surface of iron dipped in liquid zinc. As a result of peritectic reactions under metastable conditions, the individual phases are born, forming sub-layers in the expected sequence of Γ1, δ and ζ.
3

Liu, Qi, Yuqing Cao, Shuai Chen, Xinye Xu, Mutian Yao, Jie Fang, Kuan Lei e Guiqun Liu. "Hot-Dip Galvanizing Process and the Influence of Metallic Elements on Composite Coatings". Journal of Composites Science 8, n. 5 (25 aprile 2024): 160. http://dx.doi.org/10.3390/jcs8050160.

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The corrosion of steel materials has become a global issue, causing significant socio-economic losses and safety concerns. Hot-dip galvanizing is currently one of the most widely used steel anti-corrosion processes. With the rapid advancement of science and technology and emerging industries, the performance of pure galvanized products struggles to meet the demands of practical applications in various environments. Consequently, researchers have begun introducing various metals into the zinc solution to form high-performance alloy coatings. This article primarily explains the process flow of hot-dip galvanizing and the impact of metal elements such as Al, Mg, Sn, and Bi on the coating, as well as outlining the major issues currently faced by the hot-dip galvanizing process. The objective is to offer a more comprehensive introduction to those new to the field of hot-dip galvanizing and to provide theoretical insights for addressing production issues.
4

Sepper, Sirli, Priidu Peetsalu, Mart Saarna, Valdek Mikli e Priit Kulu. "Effect of Hot Dip Galvanizing on the Mechanical Properties of High Strength Steels". Key Engineering Materials 604 (marzo 2014): 12–15. http://dx.doi.org/10.4028/www.scientific.net/kem.604.12.

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Present study focuses on investigating the hot dip galvanizing effect on the mechanical properties of high strength steel. The effect of chemical pre-treatment (hydrogen diffusion) and the effect of hot dip galvanizing temperature on mechanical properties was studied with high strength steel S650MC. Additional tests were made with widely used structural steel S355J2. A batch type hot dip galvanizing process was used and zinc bath temperature was 450 °C and 550 °C. Results of the study show the behaviour of high strength steel during hot dip galvanizing process.
5

Kania, Henryk, Jacek Mendala, Jarosław Kozuba e Mariola Saternus. "Development of Bath Chemical Composition for Batch Hot-Dip Galvanizing—A Review". Materials 13, n. 18 (19 settembre 2020): 4168. http://dx.doi.org/10.3390/ma13184168.

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Obtaining zinc coatings by the batch hot-dip galvanizing process currently represents one of the most effective and economical methods of protecting steel products and structures against corrosion. The batch hot-dip galvanizing process has been used for over 150 years, but for several decades, there has been a dynamic development of this technology, the purpose of which is to improve the efficiency of zinc use and reduce its consumption and improve the quality of the coating. The appropriate selection of the chemical composition of the galvanizing bath enables us to control the reactivity of steel, improve the drainage of liquid zinc from the product surface, and reduce the amount of waste, which directly affects the quality of the coating and the technology of the galvanizing process. For this purpose, the effect of many alloying additives to the zinc bath on the structure and thickness of the coating was tested. The article reviews the influence of various elements introduced into the bath individually and in different configurations, discusses the positive and negative effects of their influence on the galvanizing process. The current development in the field of the chemical composition of galvanizing baths is also presented and the best-used solutions for the selection and management of the chemical composition of the bath are indicated.
6

Costa, Altamirano, Salinas, González-González e Goodwin. "Optimization of the Continuous Galvanizing Heat Treatment Process in Ultra-High Strength Dual Phase Steels Using a Multivariate Model". Metals 9, n. 6 (21 giugno 2019): 703. http://dx.doi.org/10.3390/met9060703.

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The main process variables to produce galvanized dual phase (DP) steel sheets in continuous galvanizing lines are time and temperature of intercritical austenitizing (tIA and TIA), cooling rate (CR1) after intercritical austenitizing, holding time at the galvanizing temperature (tG) and finally the cooling rate (CR2) to room temperature. In this research work, the effects of CR1, tG and CR2 on the ultimate tensile strength (UTS), yield strength (YS), and elongation (EL) of cold rolled low carbon steel were investigated by applying an experimental central composite design and a multivariate regression model. A multi-objective optimization and the Pareto Front were used for the optimization of the continuous galvanizing heat treatments. Typical thermal cycles applied for the production of continuous galvanized AHSS-DP strips were simulated in a quenching dilatometer using miniature tensile specimens. The experimental results of UTS, YS and EL were used to fit the multivariate regression model for the prediction of these mechanical properties from the processing parameters (CR1, tG and CR2). In general, the results show that the proposed multivariate model correctly predicts the mechanical properties of UTS, YS and %EL for DP steels processed under continuous galvanizing conditions. Furthermore, it is demonstrated that the phase transformations that take place during the optimized tG (galvanizing time) play a dominant role in determining the values of the mechanical properties of the DP steel. The production of hot-dip galvanized DP steels with a minimum tensile strength of 1100 MPa is possible by applying the proposed methodology. The results provide important scientific and technological knowledge about the annealing/galvanizing thermal cycle effects on the microstructure and mechanical properties of DP steels.
7

Knop, Krzysztof. "Analysis and Improvement of the Galvanized Wire Production Process with the use of DMAIC Cycle". Quality Production Improvement - QPI 1, n. 1 (1 luglio 2019): 551–58. http://dx.doi.org/10.2478/cqpi-2019-0074.

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Abstract The article presents the results in the scope of analysis and improvement of the galvanized wire production process with the use of Six Sigma's DMAIC cycle. The basic problem was identified - incorrect wire diameters after galvanizing and specific tools and methods were used to analyze this problem and look for its solution. The potential of Pareto analysis, SPC method, control plan, 5WHY analysis was used. As a result of the analyzes carried out, the source cause was identified - contaminated containers dispensing the preparation maintaining the temperature in the galvanizing unit. To eliminate the problem, maintenance of the machine used to cover the bare wire with zinc was carried out, which allowed to achieve the following results: standstills at the Drawing and Galvanizing Department were eliminated, the duration of the manufacturing process and the percentage of products beyond the specification were significantly reduced.
8

Álló, Štefan, Vladimir Kročko, Maroš Korenko, Zuzana Andrássyová e Daniela Földešiová. "Effect of Chemical Degreasing on Corrosion Stability of Components in Automobile Industry". Advanced Materials Research 801 (settembre 2013): 19–23. http://dx.doi.org/10.4028/www.scientific.net/amr.801.19.

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This research deals with the corrosion stability of components with a galvanized surface. The aim is to determine how corrosion resistance is influenced by chemical degreasing. The ZiNi galvanizing method in a bath line was performed on 10 components; another 10 pieces were treated by the same galvanizing method, but without previous chemical degreasing. After measuring the thickness of coating, components were inserted into a salt spray corrosion chamber. The test showed that components with a complete galvanizing process revealed no signs of red corrosion after 456 test hours. In components without chemical degreasing, there were signs of red corrosion after 200 test hours. After this research, we can conclude that chemical degreasing in galvanizing processes has a high influence on corrosion resistance.
9

Kopyciński, D., E. Guzik, A. Szczęsny e D. Siekaniec. "Diffusion Coefficient in the Zinc Coating Shaped on the Surface of Cast Iron and Steel Alloys". Archives of Foundry Engineering 15, n. 2 (1 giugno 2015): 43–46. http://dx.doi.org/10.1515/afe-2015-0035.

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Abstract The article presents the method to assess the diffusion coefficient D in the sub-layer of intermetallic phases formed during hot-dip galvanizing “Armco” iron and ductile cast iron EN-GJS-500-7. Hot-dip galvanizing is one of the most popular forms of long-term protection of Fe-C alloys against corrosion. The process for producing a protective layer of sufficient quality is closely related to diffusion of atoms of zinc and iron. The simulation consist in performed a hot-dip galvanizing in laboratory condition above Fe-C alloys, in the Department of Engineering of Cast Alloys and Composites. Galvanizing time ranged from 15 to 300 seconds. Then metallographic specimens were prepared, intermetallic layers were measured and diffusion coefficient (D) were calculated. It was found that the diffusion coefficient obtained during hot-dip galvanizing “Armco” iron and zinc is about two orders of magnitude less than the coefficient obtained on ductile cast iron EN-GJS-500-7.
10

Hocking, G. C., W. L. Sweatman, A. D. Fitt e C. Breward. "Deformations during jet-stripping in the galvanizing process". Journal of Engineering Mathematics 70, n. 1-3 (27 luglio 2010): 297–306. http://dx.doi.org/10.1007/s10665-010-9394-8.

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Ti possono interessare anche gli elenchi estesi di opere sul tema "Galvanizing process":
Articoli di riviste

Tesi sul tema "Galvanizing process":

1

RANJAN, MADHU. "INFLUENCE OF SILICON ON GALVANIZING REACTIONS IN A ZINC-ALUMINUM BATH". University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1112656227.

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2

Brakna, Mohammed. "Sensor and actuator optimal location for dynamic controller design. Application to active vibration reduction in a galvanizing process". Electronic Thesis or Diss., Université de Lorraine, 2023. https://docnum.univ-lorraine.fr/ulprive/DDOC_T_2023_0152_BRAKNA.pdf.

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Les objectifs de cette thèse sont de déterminer un modèle à la fois suffisamment précis mais numériquement exploitable pour proposer des méthodologies de placement de capteurs et d'actionneurs pour le contrôle actif de vibration dans une ligne de galvanisation. La galvanisation consiste à recouvrir un métal (dans notre étude : de l'acier) par une couche protectrice de zinc qui évite la corrosion due à l'air. L'épaisseur de cette couche doit être constante pour garantir les propriétés mécaniques et l'état de surface du produit. Dans une ligne de galvanisation, la bande d'acier en mouvement est chauffée puis plongée dans un bain de zinc liquide avant d'être essorée par des buses projetant de l'air. L'air pulsé, ainsi que la rotation des cylindres d'entrainement de la bande - entre autres - créent des vibrations qui viennent perturber l'essorage et donc la régularité du dépôt de zinc. Un contrôle actif est donc nécessaire, par exemple au moyen d'électro-aimants placés de part et d'autre de la bande d'acier en mouvement. Dans un premier temps, un modèle de comportement de la bande d'acier dans la ligne de galvanisation prenant en compte la présence et la propagation des vibrations a été obtenu par discrétisation spatiale d'une équation aux dérivées partielles. Ce modèle de type espace d'état a été validé en simulation et expérimentalement sur une ligne de galvanisation pilote d'ArcelorMittal Research à Maizières-lès-Metz. Une fois ce modèle établi, l'objectif de l'étude est la recherche du placement optimal de capteurs, pour mesurer le plus efficacement les vibrations de la bande, mais également d'actionneurs pour minimiser l'amplitude de ces vibrations par une loi de commande adaptée. Ces problèmes de placements optimaux sont au cœur des thématiques de contrôle actif des vibrations et se retrouvent dans de nombreux domaines d'application. Une méthode de placement basée sur la maximisation des Grammiens a été proposée en vue de réduire l'impact des perturbations sur le système. Différentes stratégies de contrôle ont été envisagées telles que le retour d'état observé et le retour d'état étendu observé pour améliorer les résultats en tenant compte de l'estimation des perturbations par un observateur PI (proportionnel-intégral). Des résultats de simulations et expérimentaux illustrent les résultats obtenus
The aims of the present PhD thesis are to determine a model that is both sufficiently accurate and numerically exploitable to propose optimal placement of sensors and actuators for active vibration control in a galvanizing line. A continuous hot-dip galvanizing process consists in covering a metal (here: a steel band) by a protective layer of zinc which avoids the corrosion due to the air. The thickness of this layer must be constant to guarantee the mechanical properties and surface condition of the product. In a galvanizing line, the moving steel strip is heated and then immersed in a liquid zinc bath before being wiped out by nozzles projecting air. The air flow, as well as the rotation of the driving rolls, among other things, creates vibrations affecting the wiping process and thus the regularity of the zinc deposit. Active control is therefore necessary, for example by means of electromagnets placed on either side of the moving steel strip. In a first step, a behavioral model of the steel strip taking into account the presence and propagation of vibrations was obtained by spatial discretization of a partial differential equation. This state space model was validated in simulation and experimentally on a pilot galvanizing line of ArcelorMittal Research in Maizières-lès-Metz. Once this model is established, the objective of the study is to find the optimal placement of sensors, to measure the vibrations of the strip as efficiently as possible, but also of actuators to minimize the amplitude of these vibrations by an appropriate control law. These problems of optimal placement are at the heart of the issues of active vibration control and are found in many fields of application. An optimal placement method based on Gramian maximization has been proposed in order to reduce the impact of disturbances on the system. Different control strategies have been considered such as (i) observed state feedback based on Kalman filter and LQ regulator; and (ii) extended observed state feedback to improve the results by also taking into account the disturbance estimation provided by a PI (proportional-integral) observer. Simulation and experimental results illustrate the thesis contributions
3

Stahlschmidt, Marcelo Franzkowiak. "Estudo do processo de recozimento em linha de galvanização : caracterização e implicações inerentes ao arraste de chumbo". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/32015.

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O presente trabalho descreve os resultados obtidos a partir de análises do processo de trefilação de arames e posterior recozimento destes em forno de chumbo. Baseado na metodologia DOE, busca-se o entendimento da ocorrência do arraste de chumbo proveniente dos arames recozidos, com o objetivo de minimizar este problema. Amostras de arame foram coletadas diretamente em máquinas de trefila e em linha de galvanização e submetidas a ensaios de verificação da rugosidade superficial e suas implicações no arraste de chumbo, baseadas em variáveis como velocidade da linha, diâmetro do arame, temperatura do banho de chumbo, capacidade térmica da cuba, condição superficial do arame, rugosidade do arame e limpeza superficial do arame. Foram propostas alternativas para minimizar o arraste de chumbo buscando o aumento do desempenho em máquinas de trefila e do recozimento emlinha de galvanização.
The present work describe the experiments carried out based on the wire drawing process analysis and later annealing on lead furnace on a galvanizing line. Using D.O.E methodology, the aim is to understand the occurrence of lead entrainment originating from the annealed wires in order to decrease this problem. Wire samples were collected from wire drawing machines and galvanizing line and submitted to surface roughness analysis and its implications on lead drag out based on wire speed, wire diameter, lead bath temperature, thermal capacity of the lead kettle, wire surface condition, wire roughness and wire superficial cleanliness. Proposals to decrease lead drag out were made in order to increase wire drawing machines and galvanizing line performance.
4

Ferrari, Jean Vicente. "Contaminação com sal de cloreto e cromatização da superfície do aço zincado no processo não-contínuo de zincagem por imersão a quente: influência no desempenho de tintas e determinação de pré-tratamentos para pintura adequados". Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-05092006-124730/.

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O processo industrial não-contínuo de zincagem por imersão a quente (ZIQ) pode ocasionar a contaminação superficial do aço-carbono zincado por imersão a quente (AZIQ) com resíduos de cloreto. Estes resíduos, se não forem efetivamente eliminados, podem influenciar negativamente no desempenho dos esquemas de pintura dos sistemas dúplex (zincagem mais pintura). Sabe-se que no processo de ZIQ, a cromatização é amplamente utilizada, entretanto, o efeito que este pós-tratamento exerce no desempenho dos esquemas de pintura ainda não é bem estabelecido. Neste contexto, este trabalho teve como objetivos: I - verificar o grau de contaminação no AZIQ com sal de cloreto devido ao próprio processo de ZIQ; II - verificar os efeitos da contaminação com sal de cloreto e da cromatização do processo ZIQ no desempenho de tintas aplicadas sobre o AZIQ; e III – determinar pré-tratamentos para pintura adequados para o bom desempenho das tintas aplicadas sobre o AZIQ. A metodologia adotada para alcançar o objetivo I envolveu a zincagem de chapas de aço-carbono em diferentes prestadores de serviço de ZIQ, em diferentes condições. Estas chapas zincadas foram analisadas por microanálise química qualitativa por espectrometria de dispersão de energia (EDS) em microscópio eletrônico de varredura (MEV) e pela determinação dos teores de cloreto superficiais, por método de extração com água em ebulição. A partir dos resultados obtidos para se alcançar o objetivo I, foi possível definir as condições no processo de ZIQ que potencialmente causam maior contaminação da superfície do AZIQ com sal de cloreto. Assim, para se alcançar os objetivos II e III, chapas de aço-carbono foram zincadas naquelas condições de máxima contaminação com sal de cloreto e parte delas foi submetida ao pós-tratamento de cromatização. Em seguida, uma grande parte destas chapas zincadas (cromatizadas ou não) foi submetida aos pré-tratamentos para pintura de desengraxe com solvente orgânico, de hidrojateamento a alta pressão, de jateamento abrasivo ligeiro e de ação mecânica com esponja abrasiva e água quente. Finalmente, as chapas zincadas, incluindo as não submetidas aos pré-tratamentos, foram pintadas com uma demão de tinta de aderência mais uma demão de tinta de acabamento. As chapas zincadas e pintadas foram submetidas a ensaios acelerados (imersão em água destilada e exposição em câmara de umidade saturada) e não-acelerados de corrosão (exposição em estação de corrosão atmosférica) e avaliadas por meio dos ensaios tradicionais de acompanhamento de desempenho (grau de empolamento e ensaios de aderência de tinta) e eletroquímicos (medida de potencial de circuito aberto, curva de polarização e espectroscopia de impedância eletroquímica – E.I.E.). Algumas chapas zincadas, antes da pintura, foram submetidas aos ensaios de caracterização física (exame microestrutural e morfológico em MEV e rugosidade superficial), química microanálise por EDS, difração de raios X e teor de cloreto superficial pelo método de extração com água em ebulição) e eletroquímica. Os resultados obtidos, neste estudo, permitiram verificar que a aplicação adicional de sal cloreto de amônio sólido durante o processo de ZIQ tende a aumentar o grau de contaminação superficial do AZIQ com cloreto e, as etapas de resfriamento e/ou de cromatização do processo também contribuem para esta contaminação. No geral, o desempenho do AZIQ cromatizado teve desempenho inferior em relação ao não-cromatizados. O hidrojateamento a alta pressão e a lavagem com água e ação mecânica foram os prétratamentos que proporcionaram os melhores desempenhos dos esquemas de pintura.
The batch galvanizing process (BGP) can lead to surface contamination of hot-dip galvanized steel (HDGS) with chloride residues. If these residues are not effectively eliminated, they can influence negatively on the performance of duplex systems (galvanizing plus painting). It is known that the chromate quenching is widely used in the BGP, however the effect of this post-treatment on the performance of duplex systems is not well established yet. In this sense, this work aimed: I – to verify the contamination degree of HDGS with chloride salt due to the BGP itself; II – to verify the effects of the chloride salt contamination and chromate quenching on the performance of paints applied on HDGS; and III – to determine the suitable surface preparation for painting in order for obtaining a good paint performance applied on HDGS. The adopted methodology to achieve goal I involved the galvanizing of steel plates in different service renderings with BGP, in different conditions. These HDGS plates were submitted to the qualitative energy dispersive microanalyses (EDS) in scanning electron microscopy (SEM) and to the determination of superficial chloride contents by the boiling water extraction method. From the obtained results, the conditions in the BGP that potentially lead to greater surface contamination of HDGS with chloride salt were determined. Thus, to achieve goals II and III, steel plates were galvanized under the maximum chloride salt contamination condition and part of them were submitted to chromate quenching. After that, a great part of these HDGS plates (chromated or non chromated quenching) was submitted to the surface preparations for painting through organic solvent cleaning, high pressure hydroblasting, sweep blasting and handled scrub cleaning with an abrasive sponge and hot distilled water. Finally, the HDGS plates, including those not submitted to the surface preparations for painting, were painted with one coat of primer plus one coat of finishing paint. The HDGS painted plates were submitted to accelerated (distilled water immersion and humidity chamber exposure) and non accelerated (atmospheric exposure) corrosion tests and their performance were verified by means of traditional tests (degree of blistering and paint adhesion) and electrochemical measurements (open circuit potential, polarization curve and electrochemical impedance spectroscopy – E.I.S.). Before painting, some HDGS plates were submitted to tests for physical (microstructural and morphological analyses in MEV and surface roughness), chemical (EDS, X-ray diffraction and superficial chloride contents by the boiling water extraction method) and electrochemical characterization. The obtained results allowed verifying that the additional application of solid ammonium chloride salt during the BGP tends to increase the degree of superficial chloride contamination of the HDGS and, the water and/or chromate quenching also contribute for this contamination. In general, the chromated HDGS presented worst performances. The high pressure hydroblasting and the handled scrub cleaning with an abrasive sponge and hot distilled water were the surface preparations for painting that provided the best performances of paint systems.
5

Andara, Flávio Roberto. "AVALIAÇÃO DE UM PROCESSO DE ELETROGALVANIZAÇÃO POR MEIO DE MODELAGEM ESTATÍSTICA E CARTAS DE CONTROLE". Universidade Federal de Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/8364.

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Quality tools, more specifically control charts, are important statistical resources to know and to monitor production processes. Their goal is to find the common and notable causes of a process to, through monitoring, increase the stability and, from it, assess if the process is under control. The dynamics of today s industrial activities has raised new requirements for good monitoring, and in that sense, new control tools have been developed and these are able to understand the new causal relationships among variables. The research shows the use of three modeling methodologies to treat autocorrelated data enabling to monitor a productive electroplating process. Initially, it was carried out a descriptive analysis for the verification of normality and independence and, afterwards, ARIMA from Box and Jenkins models, ARMAX models of multiple linear regression, MRLM, for the subsequent construction of waste control charts. In addition to the provided academic knowledge, it presents more than one application of control charts to the industrial environment, and also collaborates with the company where the research was developed showing which of the methods is more effective in controlling the production. The best result obtained by monitoring these three statistical methodologies work when confronted with the conventional control method, i.e., without treating the autocorrelation, it was used ARIMA model and a subsequent application of waste control charts derived from this modeling. The decision of the most effective methodology for modeling electroplating was defined by the number of points found out of the conventional limits established. The one that better captured the fluctuations of the process was obtained with the residues of ARIMA.
As ferramentas da qualidade, mais especificamente as cartas de controle, são importantes recursos estatísticos para se conhecer e monitorar processos produtivos, sendo que seu objetivo é encontrar as causas comuns e assinaláveis de um processo para, com seu monitoramento, aumentar sua estabilidade e, a partir daí, considerar se o processo está sob controle. A dinâmica das atividades industriais hoje existentes fez surgir novas necessidades para um bom monitoramento, e, nesse sentido, novas ferramentas de controle foram desenvolvidas, capazes de entender as novas relações causais entre as variáveis. A pesquisa apresenta o uso de três metodologias de modelagem para tratar dados autocorrelacionados possibilitando o monitoramento de um processo produtivo de eletrogalvanização. Inicialmente foi realizada uma análise descritiva para a verificação de pressupostos de normalidade e independência e após foram ajustados os modelos ARIMA de Box e Jenkis, modelos ARMAX e modelos de regressão linear múltipla, MRLM, para posterior construção das cartas de controle dos resíduos. Além do conhecimento acadêmico proporcionado, apresenta mais de uma aplicação das cartas de controle ao ambiente industrial, e também colabora com a empresa onde a pesquisa foi desenvolvida mostrando qual das metodologias é mais efetiva no controle da produção. O melhor resultado de monitoramento obtido com o trabalho estatístico nessas três metodologias quando confrontado com o método de controle convencional, ou seja, sem tratar a autocorrelação foi utilizando a modelo ARIMA e posterior aplicação dos gráficos de controle de resíduos oriundos desta modelagem. A decisão da metodologia de modelagem mais eficaz para a eletrogalvanização foi definida pelo número de pontos encontrados fora dos limites convencionais estabelecidos. A que melhor captou as flutuações do processo foi a obtida com os resíduos do ARIMA.
6

Brepohl, Danielle Cristina de Campos Silva. "Caracterização das camadas formadas no processo de galvanização à quente sobre uma chapa de aço livre intersticiais". Universidade Tecnológica Federal do Paraná, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/567.

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A indústria automobilística, ao visar o aumento da garantia à corrosão, emprega na construção das carrocerias aços IF (intersticial free) galvanizados, já que estes atendem aos critérios de qualidade superficial, conformabilidade, soldabilidade, entre outras características requeridas. Dentro deste contexto, a resistência à corrosão de um aço livre de intersticiais (IF) com revestimento galvanizado comum (GI) e diferentes gramaturas (85 g/m2 (Z85), 100 g/m2 (Z100), 120 g/m2 (Z120), 144 g/m2 (Z144) e 180 g/m2 (Z180), fosfatizadas e com cataforese, foram avaliadas neste estudo por intermédio do ensaio de corrosão cíclica acelerado. O resultado deste ensaio mostrou que mesmo com a variação da gramatura do revestimento (GI) a resistência à corrosão foi praticamente a mesma, levando-se a hipótese que a camada intermetálica que está presente em todas as amostras independente da gramatura, pode possui uma grande influência na resistência à corrosão. Assim ensaios suplementares foram feitos para compreender o efeito da camada de zinco e a camada intermetálica na resistência à corrosão. A caracterização das camadas formadas durante o processo de galvanização GI foi realizado na amostra com gramatura de 100 g/m2 (Z100). Tal amostra foi escolhida por ser a mais empregada pela indústria automobilística e a mesma não sofreu nenhum pré tratamento já que o objetivo foi analisar apenas as camadas do galvanizado comum GI. Os ensaios realizados foram de microestrutura (XRD, MEV e EDS) e ensaio eletroquímico (dissolução eletroquímica e polarização potenciodinâmica). Concluiu-se que a camada intermetálica é formada pelas fases Fe2Al5 e FeAl3, com predominância da fase Fe2Al5. O ensaio de dissolução eletroquímica demonstrou que a resistência o corrosão da camada intermetálica é no mínimo 7 vezes maior que a do zinco, além deste resultado o ensaio de polarização potenciodinâmica apresentou que a camada intermetálica passiva, retardando a velocidade de oxidação, ou seja, aumenta a resistência à corrosão do galvanizado comum GI.
The automobile industry, when seeking to increase warranty against corrosions, employs galvanized IF (intersticial free) steels to the body shell, since these meet the superficial, compliance, weldability and other quality criteria. In this context, the corrosion resistance of an IF steel with galvanic coating (GI) and different weights (85 g/m2 (Z85), 100 g/m2 (Z100), 120 g/m2 (Z120), 144 g/m2 (Z144) and 180 g/m2 (Z180), phosphated and with cataphoresis, were evaluated through an accelerated cyclical corrosion experiment. The result of this experiment showed that even with the variation of the galvanic coating (GI) the result of the corrosion resistance was the same, leading to the hypothesis that the intermetallic layer which is present in all samples, regardless of the weight, must influence corrosion resistance. Thus, supplementary experiments were done to comprehend the effect of the zinc layer and the intermetallic layer in corrosion resistance. The characterization of the layers formed in the GI galvanizing process was done in the Z100 (100g/m²) sample. This sample was chosen because it is the most used in the automobile industry and it did not suffer any previous treatment since the objective was to analyze only the layers of galvanized GI. The experiments done were in the microstructure (XRD, MEV and EDS) and electrochemical experiment (potenciodinamic polarization). We concluded that the intermetallic layer is formed by phases Fe2Al5 and FeAl3, with predominance of phase Fe2Al5. It was verified through the electrochemical dissolution experiment that the intermetallic corrosion resistance is at minimum 7 times greater than of the zinc, further on this result, the potentiodynamic polarization experiment shows that the passive intermetallic layer slows the oxidation velocity, which means, the galvanic coating (GI) corrosion resistance is increased.
7

Chen, Chen-Tsao, e 陳貞造. "Study on Processing Parameters of Yellow Zinc Galvanizing Process by Trivalent Chromium". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/nkfzy6.

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碩士
國立彰化師範大學
電機工程學系
105
Galvanized parts as the underlying corrosion treatment have better anti-corrosion effect. Also, the anti-corrosion ability can be enhanced if the film formation process is subjected to electrical galvanized surface. Film formation process of the present technology is divided into hexavalent and trivalent chromium, hexavalent chromium is toxic and will cause harm to humans and the environment, and trivalent chromium is not only non-toxic and harmless to human body, is also easier to handle wastewater, not a burden on the environment. So trivalent chromium chemical conversion coating film is the mainstream of future development. Trivalent chromium chemical conversion coating film can be classified into blue zinc, multicolored, and black zinc coating, the present study was to investigate the trivalent chromium chemical conversion coating film in a colorful coating. The study includes the temperature of the reaction process, P/H value, and the corrosive nature of the completion of the plating color. Then through the key parameters in the analysis of experimental data to optimize the process to achieve low cost, good quality, high efficiency, and high yield results. In this study, the experimental results show that the process of trivalent chromium galvanizing in the P/H value of 2.2, the temperature value of 40 ℃ and the concentration of 8 % in plating environment, have superior quality that the others. In the future, trivalent chromium chemical conversion coating film will gradually replace hexavalent chromium. Because of its non-toxic, easy to handle wastewater, and meet the regulations and requirements of green production line with modern environmental.

Libri sul tema "Galvanizing process":

1

Hornsby, J. M. Hot-dip galvanizing: Guide to process selection and galvanizing practice. London: Intermediate Technology Publications, 1994.

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2

Bennett, Caroline, Jian Li e Adolfo Matamoros. Mitigation of Weldment Cracking in Steel Highway Structures Due to the Galvanizing Process. Washington, D.C.: Transportation Research Board, 2021. http://dx.doi.org/10.17226/26223.

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3

Kopyciński, Dariusz. Krystalizacja faz międzymetalicznych i cynku na żelazie oraz na jego nisko- i wysokowęglowych stopach podczas procesu cynkowania. Kraków: AGH Uczelniane Wydawnictwa Naukowo-Dydaktyczne, 2006.

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4

Kopyciński, Dariusz. Krystalizacja faz międzymetalicznych i cynku na żelazie oraz na jego nisko- i wysokowęglowych stopach podczas procesu cynkowania. Kraków: AGH Uczelniane Wydawnictwa Naukowo-Dydaktyczne, 2006.

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5

Hornsby, M. J. Hot-Dip Galvanizing: A Guide to Process Selection and Galvanizing Practice. Practical Action, 1995.

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6

Matin, Samiha. Private Femininity, Public Femininity. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252036613.003.0007.

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This chapter examines the contemporary costume film's unique interrelationship of femininity and privacy by focusing on how the historical constraints of privacy force the post-feminist heroine to make herself anew as a feminine subject. It uses the two poles of privacy and publicness to organize relationships between gender, feeling, time, aesthetics, and identity, worked through and re-envisioned by costume films for present-day viewers. By these means, the values of privacy and publicness are recalibrated to accommodate a mutable femininity that uses aesthetics and feeling as creative methods of adaptation. The heroine's process of identity construction consists of tests, experiments, and play with self-presentation to find and utilize the sanctioned meanings and covert privileges afforded by femininity. In reassembling elements of gender and galvanizing their force to new ends, spaces for covert resistance and pressure-release emerge. This course is one of “tactical aesthetics,” or the deployment of style to access power which makes use of gendered acts, expressions, dress, and etiquette to design new advantages. To explore this concept, the chapter analyzes two films, Elizabeth (1997) and Marie Antoinette (2006), as divergent visions of femininity.

Capitoli di libri sul tema "Galvanizing process":

1

Kopyciński, Dariusz. "Crystallization of Intermetallic Phases Fe-Zn during Hot-Dip Galvanizing Process". In TMS2013 Supplemental Proceedings, 439–46. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118663547.ch54.

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Huber, Frédéric, e Wolfgang Bleck. "Hot-Dip Galvanizing Process Using ZinQuench for Processing Advanced High-Strength Steels". In 18th International Federation for Heat Treatment and Surface Engineering, 423–37. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2011. http://dx.doi.org/10.1520/stp49448t.

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Huber, Frédéric, e Wolfgang Bleck. "Hot-Dip Galvanizing Process Using ZinQuench for Processing Advanced High-Strength Steels". In 18th International Federation for Heat Treatment and Surface Engineering, 423–37. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2011. http://dx.doi.org/10.1520/stp153220120030.

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Vates, Umesh Kumar, B. P. Sharma, Nand Jee Kanu, Naveen Anand Daniel, Sivaraos Subramanian e Priyanshu Sharma. "Optimization of Process Parameters of Galvanizing Steel in Resistance Seam Welding Using RSM". In Proceedings of International Conference in Mechanical and Energy Technology, 695–706. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2647-3_65.

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Hussain, Fazal, Saud Alhayli e Mahmoud Aljurf. "Data Unit, Translational Research, and Registries". In The Comprehensive Cancer Center, 157–65. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-82052-7_16.

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AbstractResearch is the only way to challenge the existing standards of care; a dynamic and multidimensional process encompassing innovative therapeutic modalities, techniques, and interventions to optimize outcomes and quality of life of cancer patients. Cancer research has emerged as one of the core competencies for the standardization, accreditation, and academic standing of any comprehensive cancer center. Data unit is the center of gravity and the hub of research and development (databases, registries, translational research, randomized control trials) in a quality cancer care facility. Quality assurance, ethical conduct, and monitoring of research are the hallmarks of a center of excellence in galvanizing the research efforts and optimizing the quality outcomes.
6

Rudnik, Ewa. "Hydrometallurgical Recovery of Zinc from By-Products and Waste Materials of Hot-Dip Galvanizing Process". In The Minerals, Metals & Materials Series, 205–34. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-14685-5_6.

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He, Dakuo, Kai Zhang, Da Li e Qihao Wu. "Research of Process Monitoring and Fault Trace System for Annealing Furnace of Hot-Dip Galvanizing Line". In Proceedings of the 2015 International Conference on Electrical and Information Technologies for Rail Transportation, 279–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49370-0_29.

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Hussain, Fazal, Riad El Fakih e Mahmoud Aljurf. "Data Management". In Quality Management and Accreditation in Hematopoietic Stem Cell Transplantation and Cellular Therapy, 137–46. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64492-5_15.

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AbstractEffective data management is critical for quality research in any hematopoietic stem cell transplantation (HSCT) center for accuracy, reliability, and validity of the data. HSCT research is a dynamic and multi-domain process encompassing innovative therapeutic modalities, techniques, and interventions to change the existing standard of care and optimize survival outcomes and patients’ quality of life. Research has evolved as one of the core competencies for the standardization, accreditation, and academic standing of the transplant center. The Data Unit is the center of gravity and the hub of research (databases, registries, translational research, and randomized control trials) in a quality cancer care facility. HSCT data collection, collation, and interpretation have become an integral part of the treatment rather than an option. Quality assurance (QA) and continuous quality improvement (CQI) in data management are pivotal for credibility, measurable/quantifiable outcomes, clinically significant impact, and setting benchmarks. Quality assurance, ethical conduct, and monitoring of HSCT data are the hallmarks of a center of excellence in galvanizing the therapeutic interventions and optimizing the outcomes.
9

Wesselmecking, Sebastian, Marc Ackermann, Charline Blankart, Jing Wang, Frederike Brasche, Tobias Plum, Siyuan Qin et al. "Toward Holistic Digital Material Description During Press-Hardening". In Internet of Production, 1–16. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-98062-7_22-1.

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AbstractPress hardening of manganese-boron steels is one of the most widely used production processes for high-strength automotive components. The low residual formability of these parts is a decisive disadvantage. The low formability originates from a strong, but brittle martensitic microstructure transformed during quenching in the press-hardening tool. In contrast, medium manganese steels (MMnS) contain high fractions of ductile retained austenite improving press-hardened parts toward promising candidates for crash-relevant car body components. Disadvantages include a more complex alloy design, a highly sensitive production process, and more demanding requirements on the tool due to higher strength during press-hardening.A detailed description of the entire production process along the process chain including the material and the press-hardening tool is important for tailoring the properties. Combined information is required to enable a precise control of the production process and its influences on the final properties of the part. Maximum economic use of the material is achieved by digitally describing MMnS as well as the tool along the entire process chain (casting, forging, hot rolling, cold rolling, galvanizing and press hardening including Q&P). To link the process steps and to describe the changes of the material, a new material database structure (idCarl) was developed. All production parameters are recorded and processed as a digital material twin. Ultimately, deviations occurring during production process can be deduced from in-line data analysis and counteracted. These can then be counteracted by adapted process control and the product can be brought back into the required parameter field of properties. Clear identification of the component and the used material allows conclusions about steps responsible for errors in the production process that become apparent during use.
10

Wesselmecking, Sebastian, Marc Ackermann, Charline Blankart, Jing Wang, Frederike Brasche, Tobias Plum, Siyuan Qin et al. "Toward Holistic Digital Material Description During Press-Hardening". In Internet of Production, 171–86. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-44497-5_22.

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AbstractPress hardening of manganese-boron steels is one of the most widely used production processes for high-strength automotive components. The low residual formability of these parts is a decisive disadvantage. The low formability originates from a strong, but brittle martensitic microstructure transformed during quenching in the press-hardening tool. In contrast, medium manganese steels (MMnS) contain high fractions of ductile retained austenite improving press-hardened parts toward promising candidates for crash-relevant car body components. Disadvantages include a more complex alloy design, a highly sensitive production process, and more demanding requirements on the tool due to higher strength during press-hardening.A detailed description of the entire production process along the process chain including the material and the press-hardening tool is important for tailoring the properties. Combined information is required to enable a precise control of the production process and its influences on the final properties of the part. Maximum economic use of the material is achieved by digitally describing MMnS as well as the tool along the entire process chain (casting, forging, hot rolling, cold rolling, galvanizing and press hardening including Q&P). To link the process steps and to describe the changes of the material, a new material database structure (idCarl) was developed. All production parameters are recorded and processed as a digital material twin. Ultimately, deviations occurring during production process can be deduced from in-line data analysis and counteracted. These can then be counteracted by adapted process control and the product can be brought back into the required parameter field of properties. Clear identification of the component and the used material allows conclusions about steps responsible for errors in the production process that become apparent during use.

Atti di convegni sul tema "Galvanizing process":

1

Liu, D., e M. Stroia. "Continuous Galvanizing Process for Long Steel Products". In AISTech 2020. AIST, 2020. http://dx.doi.org/10.33313/380/137.

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2

Morganti, Francisco, Fritz Brühl e Caesar Sasse. "INFLUENCES OF MODERN AHSS-GRADES ON THE PICKLING, ANNEALING AND GALVANIZING PROCESS". In 54º Seminário de Laminação e Conformação. São Paulo: Editora Blucher, 2017. http://dx.doi.org/10.5151/1983-4764-30151.

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Huang, F., Y. Chen, F. Fang, X. F. Du, F. Y. Sun, L. B. Pan e F. Huang. "Selective Oxidation Behaviors of a DP780 Steel during Hot-Dip Galvanizing Process". In The 2nd International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2015). WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789813140622_0039.

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Ibrahim, Abdulwahab, e Scott MacIntyre. "Galvanized Steel as a Sustainable Material-Technology and Failure Analysis". In The 2nd International Conference on Civil Infrastructure and Construction. Qatar University Press, 2023. http://dx.doi.org/10.29117/cic.2023.0102.

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The building industry is responsible for 40% of global CO2 emissions and 36% of global energy consumption. Therefore, it is not surprising that the industry is motivated to embrace more environment-friendly procedures and turning to more environment-friendly materials and manufacturing processes. Driven by ever-stricter environmental norms and regulations, as well as rising costs, galvanizing is considered as an affordable, again, an environment-friendly and 'green' corrosion protection method. In order to prevent corrosion and produce a tough, long-lasting surface, clean steel is coated with a layer of molten zinc during the hot-dip galvanizing process. It has the extra benefit of completely covering the steel, making it more durable than conventional coatings that just adhere chemically or mechanically. As a result, it is not only very efficient but also very environment-friendly. A single, one-time treatment will completely coat a product's interior and exterior, giving it a coating that can shield steel and keep it from needing maintenance for more than 70 years. In this paper, galvanizing will be introduced as an efficient, affordable, and environment-friendly anti-corrosion method. Technical issues related to the process are presented and challenges associated with galvanizing are addressed. The experimental part includes measuring the zinc coating layer using optical microscopy. Failure cases related to galvanized structures which include bridges, bolts, and fire affected monopole are discussed, root causes were analyzed, and recommendations are provided.
5

Zhang, Hongmei, Heran Li, Yujing Fu e Lianjie Li. "Simulation Analysis of Different Thickness Control in the Continuous Hot-dip Galvanizing Process". In 2015 6th International Conference on Manufacturing Science and Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icmse-15.2015.235.

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Fan, Song, Min Zhang Li e Jia Wang. "Independent component analysis with application to hot galvanizing pickling waste liquor treatment process". In 2017 36th Chinese Control Conference (CCC). IEEE, 2017. http://dx.doi.org/10.23919/chicc.2017.8028466.

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7

Bobzin, K., T. Schläfer, T. Warda e C. Schulz. "Thermal Spraying of Advanced Zinc Alloys as an Addition to Hot-Dip Galvanizing". In ITSC2011, a cura di B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima e A. McDonald. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0840.

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Abstract Zinc coatings are widely adopted for cathodic corrosion protection. Mostly the process of choice is hot-dip galvanizing but due to limitations regarding component size and composition of the galvanizing bath it is not always practicable. In the present paper zinc coatings alloyed with Al, Sn, Mg and Cr are applied by twin wire arc spraying to enhance the corrosion protection ability of zinc thermal sprayed coatings. The alloys were characterized and investigated using salt spray test and by means of electrochemical corrosion. Corrosion damage and products were investigated by optical microscopy, scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDS) and electron probe microanalysis (EPMA).
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Mcdermid, J. R., S. Dionne, O. Dremailova, B. Voyzelle, E. Essadiqi, E. Baril e F. E. Goodwin. "The Effect of Continuous Galvanizing Process Parameters on the User Properties of Hot-Rolled Transformation Induced Plasticity Steels". In SAE 2005 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2005. http://dx.doi.org/10.4271/2005-01-0495.

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Yoon, Hyun Gi, Gi Jang Ahn, Myung Kyoon Chung e Jong Keun Kim. "Aerodynamic Investigation of Air Knife System to Find Out the Mechanism of the Check Mark in a Continuous Hot-Dip Galvanizing Process". In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68056.

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When galvanized steel strip is produced through a continuous hot-dip galvanizing process, the thickness of the adhered zinc film is controlled by a gas wiping process. In the gas wiping process there is a technically serious problem which is called a “check mark problem”. The check mark is caused by non-uniform coating on the steel strip surface. Such a non-uniform zinc coating lowers the quality, productivity and profit of the end products. In the present study, to find out the causes of the check mark and technical methods to resolve the check mark problem, the flow field of the high speed rectangular nitrogen gas jet which is impinging on the moving steel strip in the continuous hot-dip galvanizing system has been investigated numerically by using a commercial 3-D flow analysis code, FLUENT. LES (Large Eddy Simulation) is used to obtain instantaneous flow field in the region under consideration. Numerical studies were conducted for two ratios of the plate distance (d) to the nozzle width (x) d/x = 6.7, 10.5 under the same jet Reynolds number of Re = 20000. It was found that the check mark is caused by the alternating vortices which are generated on the jet impinging line (stagnation line). The center of the alternating vortex has a relatively low pressure compared with the periphery of the vortex. The high impinging pressure removes the adhered molten zinc more than the low pressure. Hence the non-uniformity of the zinc coating appears on the strip surface. Such the alternating vortices move periodically to the right and to the left sides on the impinging line due to the jet flow instability and the pressure force balance. In addition since the strip moves upward at a constant speed, the non-uniform coating results in a variety of patterns like “W”, “V” and “X”. This pattern is collectively called as “check mark” in the production field. The angle of the check mark was calculated by using both the moving speeds of the steel strip and the vortices. It was favorably compared with the experimental measurement.
10

Oktavina, Rakhma. "Optimizing The Hot-dip Galvanizing Process Of Angle Bar Steel Product According To ISO 1461 Standard Using The Taguchi Method". In 13th Annual International International Conference on Industrial Engineering and Operations Management. Michigan, USA: IEOM Society International, 2023. http://dx.doi.org/10.46254/an13.20230200.

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Rapporti di organizzazioni sul tema "Galvanizing process":

1

Energy-efficient process for hot-dip batch galvanizing. Office of Scientific and Technical Information (OSTI), aprile 1998. http://dx.doi.org/10.2172/594463.

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