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Journal articles on the topic 'Hot dip metallic coating'

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Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Zhang, Hui, and M. Karim Moallemi. "Numerical simulation of hot-dip metallic coating process." International Journal of Heat and Mass Transfer 38, no. 2 (January 1995): 241–57. http://dx.doi.org/10.1016/0017-9310(95)90009-8.

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2

Mondal, A., A. Chakraborty, P. Mohanta, and M. Dutta. "Effect of a thin prior-metallic coating on the morphology of hot-dip Zn coating." Ironmaking & Steelmaking 43, no. 7 (February 9, 2016): 508–16. http://dx.doi.org/10.1080/03019233.2015.1109791.

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3

Bensalah, W., N. Loukil, M. De-Petris Wery, and H. F. Ayedi. "Assessment of Automotive Coatings Used on Different Metallic Substrates." International Journal of Corrosion 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/838054.

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Four epoxy primers commonly used in the automotive industry were applied by gravity pneumatic spray gun over metallic substrates, specifically, steel, electrogalvanized steel, hot-dip galvanized steel, and aluminum. A two-component polyurethane resin was used as topcoat. To evaluate the performance of the different coating systems, the treated panels were submitted to mechanical testing using Persoz hardness, impact resistance, cupping, lattice method, and bending. Tribological properties of different coating systems were conducted using pin on disc machine. Immersion tests were carried out in 5% NaCl and immersion tests in 3% NaOH solutions. Results showed which of the coating systems is more suitable for each substrate in terms of mechanical, tribological, and anticorrosive performance.

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4

Urbanovich, N. I., K. E. Baranovsky, E. V. Rozenberg, T. I. Bendik, A. A. Karpenkin, V. A. Ashuiko, V. G. Matys, and V. F. Volosyuk. "Analysis of corrosive properties of zinc-containing coatings based on dispersed waste hot zinc plating." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 4 (December 16, 2020): 106–12. http://dx.doi.org/10.21122/1683-6065-2020-4-106-112.

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A comparative analysis of the corrosion properties of zinc-containing coatings obtained on the basis of metallic powder zinc and dispersed hot-dip galvanized waste has been carried out. The results of a study of the corrosion resistance of zinc-containing coatings by the electrochemical method and in a salt spray chamber have shown that coatings obtained on the basis of dispersed hot-dip galvanized waste are not inferior in protective properties to coatings based on powder standard zinc.

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5

Pruncu, C. I., Z. Azari, C. Casavola, and C. Pappalettere. "Characterization and Prediction of Cracks in Coated Materials: Direction and Length of Crack Propagation in Bimaterials." International Scholarly Research Notices 2015 (January 31, 2015): 1–13. http://dx.doi.org/10.1155/2015/594147.

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The behaviour of materials is governed by the surrounding environment. The contact area between the material and the surrounding environment is the likely spot where different forms of degradation, particularly rust, may be generated. A rust prevention treatment, like bluing, inhibitors, humidity control, coatings, and galvanization, will be necessary. The galvanization process aims to protect the surface of the material by depositing a layer of metallic zinc by either hot-dip galvanizing or electroplating. In the hot-dip galvanizing process, a metallic bond between steel and metallic zinc is obtained by immersing the steel in a zinc bath at a temperature of around 460°C. Although the hot-dip galvanizing procedure is recognized to be one of the most effective techniques to combat corrosion, cracks can arise in the intermetallic δ layer. These cracks can affect the life of the coated material and decrease the lifetime service of the entire structure. In the present paper the mechanical response of hot-dip galvanized steel submitted to mechanical loading condition is investigated. Experimental tests were performed and corroborative numerical and analytical methods were then applied in order to describe both the mechanical behaviour and the processes of crack/cracks propagation in a bimaterial as zinc-coated material.

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6

Adetunji, Olayide Rasaq, Peter Olaitan Aiyedun, and Oladimeji Suleiman Bello. "Anticorrosive Property of Potassium Dichromate Film on Galvanized Coating in Distilled Water." Solid State Phenomena 227 (January 2015): 135–38. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.135.

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Hot Dip Galvanized (HDG) coating protects steel from corrosion by providing a thick, tough metallic zinc envelope, which completely covers the steel surface and seals it from the corrosive action of its environment. The anti-corrosion ability of this sacrificial anode cathodic protection can be improved upon through the protective nature of passivation films on zinc like potassium dichromate.This study investigated the anti-corrosion effect of potassium dichromate (K2Cr2O7) film on freshly galvanized coating in distilled water (pH=7.92). The K2Cr2O7film passivity on the hot-dip zinc coated steel sheets (taken as treated in the context of this study) was used in direct comparison with their untreated counterparts. The test was run for 30 days at 120 hours interval during which the corresponding weight losses, corrosion rates, inhibitor efficiencies, and pH of the final solutions were obtained of the coupons. Analysis of results was made using Microsoft office applications. The surface morphology of the samples was obtained using Optical microscope. The results obtained revealed the greater influence of the action of the K2Cr2O7film on selected and examined HDG steel sheets corrosion performance. Weight losses increased with increase in immersion time. Inhibitor efficiency of 4.1% was achieved. The photomicrographs confirmed the occurrence of corrosion on untreated coating more than the treated ones. Conclusively, potassium dichromate was effective in passivating galvanized coating from white rust.

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7

Gill, Simran Singh, and Kapil Babbar. "Influence of Plasma Sprayed Coatings on Die Life during Hot Forging Process: A State of Art Review." Asian Journal of Engineering and Applied Technology 7, no. 2 (October 5, 2018): 132–37. http://dx.doi.org/10.51983/ajeat-2018.7.2.901.

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Tooling and die failure is a prime concern for hot forging industry for survival in the competitive globe. Different methods are employed to protect the tools/dies from degradation. Thermal spraying is one of the most effective methods to protect the material from wear, thermal fatigue and plastic deformation due to adverse environments during hot forging process, thus increasing the life of material in use. A coating is a covering process that is applied to the surface of a material which is referred to as the substrate. The coating itself is either completely covered through the whole surface or the particular parts of the substrate. Different coatings are used to achieve the desired properties. In this process, relatively thick metallic, polymer, ceramic and composite coatings is deposited. The optimum coating process is selected on the basis of desired coating properties. Coating material is either in the form of wire, powder, rod, cord or molten-bath form. The procedure may be manual, mechanized or fully automated. This paper attempts to define some of the current important issues and research priorities in the plasma spray field.

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8

Pistofidis, N., G. Vourlias, D. Chaliampalias, F. Stergioudis, and Efstathios K. Polychroniadis. "A Combined Microscopical and XRD Study of Zinc Coatings." Solid State Phenomena 163 (June 2010): 93–96. http://dx.doi.org/10.4028/www.scientific.net/ssp.163.93.

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In the present work the phases of the zinc coatings deposited with hot-dip galvanizing, pack cementation and wire flame spraying are examined with Scanning Electron Microscopy and Transmission Electron Microscopy. The different phases which are observed are identified with the combined results of electron and X-Ray diffraction. From the results it is concluded that pack cementation coatings are consisted by two different layers while hot dip galvanized coatings are composed by the same phases and additionally two extra phases of the Fe-Zn phase diagram. Flame sprayed coatings are composed by pure zinc, in the form of thin lamellae, together with nanocrystaline zinc oxide which is formed from the oxidation of liquid metallic droplets during the spray procedure.

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9

Akin, Y., R. E. Goddard, W. Sigmund, and Y. S. Hascicek. "In-Situ Study of NiO Growth on Textured Nickel Tape Using Environmental Scanning Electron Microscope (ESEM) and Hot Stage." Microscopy and Microanalysis 7, S2 (August 2001): 1276–77. http://dx.doi.org/10.1017/s1431927600032451.

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Deposition of highly textured ReBa2Cu3O7−δ (RBCO) films on metallic substrates requires a buffer layer to prevent chemical reactions, reduce lattice mismatch between metallic substrate and superconducting film layer, and to prevent diffusion of metal atoms into the superconductor film. Nickel tapes are bi-axially textured by cold rolling and annealing at appropriate temperature (RABiTS) for epitaxial growth of YBa2Cu3O7−δ (YBCO) films. As buffer layers, several oxide thin films and then YBCO were coated on bi-axially textured nickel tapes by dip coating sol-gel process. Biaxially oriented NiO on the cube-textured nickel tape by a process named Surface-Oxidation- Epitaxy (SEO) has been introduced as an alternative buffer layer. in this work we have studied in situ growth of nickel oxide by ESEM and hot stage.Representative cold rolled nickel tape (99.999%) was annealed in an electric furnace under 4% hydrogen-96% argon gas mixture at 1050°C to get bi-axially textured nickel tape.

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10

Hocking, Graeme Charles. "Draining under gravity in steel galvanization." ANZIAM Journal 61 (June 14, 2020): C31—C44. http://dx.doi.org/10.21914/anziamj.v61i0.15155.

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The problem of the coating of steel has been considered in several Mathematics in Industry study groups. In this process, after passing through a bath of molten alloy, steel sheeting is drawn upward to allow draining under gravity and stripping using an air knife, leaving a coating of desirable thickness. Here we discuss some aspects of the problem and in particular the gravity draining component. The problem is a very nice introduction to industrial modelling for students, but is also relevant for manufacturing. References Elsaadawy, E. A., Hanumanth, G. S., Balthazaar, A. K. S., McDermid, J. R., Hrymak, A. N. and Forbes, J.F. ``Coating weight model for the continuous hot-dip galvanizing process'', Metal. Mat. Trans. B, 38:413–424, 2007. doi:10.1007/s11663-007-9037-2 Hocking, G. C., Sweatman, W. L., Fitt, A. D., and Roberts M. ``Coating Deformation in the jet stripping process'' in Proceedings of the 2009 Mathematics and Statistics in Industry Study Group, Eds. T. Marchant, M. Edwards, G. Mercer. Wollongong, Austealia, 2010. https://documents.uow.edu.au/content/groups/public/@web/@inf/@math/documents/doc/uow073330.pdf Hocking, G. C., Sweatman, W. L., Fitt, A. D., and Breward, C. ``Deformations arising during air-knife stripping in the galvanization of steel'', in Progress in Industrial Mathematics at ECMI 2010, Eds. M. Gunther, A. Bartel, M. Brunk, S. Schops, M. Striebel. Mathematics in Industry 17, pp. 311-317. Springer, Berlin Heidelberg, 2011. doi:10.1007/978-3-642-25100-9_36 Hocking, G. C., Lavalle, G., Novakovic, R., O'Kiely, D., Thomson, S., Mitchell, S. J., Herterich, R. ``Bananas–-defects in the jet stripping process''. Proceedings of the European Study Group with Industry in Mathematics and Statistics Research Collection. Rome Italy, 2016. https://researchrepository.ucd.ie/handle/10197/10215 Howison, S. D. and King, J. R. ``Explicit solutions to six free-boundary problems to fluid flow and diffusion''. IMA J. Appl. Math. 42:155–175, 1989. doi:10.1093/imamat/42.2.155 Hocking, G. C., Sweatman, W., Fitt, A. D. and Breward, C. ``Deformations during jet-stripping in the galvanizing process''. J. Eng. Math. Tuck Special Issue, 70:297–306, 2011. doi:10.1007/s10665-010-9394-8 Thornton, J. A. and Graff, H. F. ``An analytical description of the jet-finishing process for hot-dip metallic coatings on strip''. Metal. Mat. Trans. B, 7:607–618, 1976. doi:10.1007/BF02698594 Tuck, E. O. ``Continuous coating with gravity and jet stripping''. Phys. Fluids, 26(9):2352–2358, 1983. doi:10.1063/1.864438 Tuck, E. O., Bentwich, M., and van der Hoek, J. ``The free boundary problem for gravity-driven unidirectional viscous flows''. IMA J. Appl. Math. 30:191–208, 1983. doi:10.1093/imamat/30.2.191

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11

Hajduga, Marta Anna, Sylwia Węgrzynkiewicz, Joanna Waś-Solipiwo, Maciej Hajduga, and Maciej Błażej Hajduga. "Innovative Solutions from the Field of the Material Science and Medicinein the Interior of Modern Ambulances." Materials Science Forum 844 (March 2016): 50–54. http://dx.doi.org/10.4028/www.scientific.net/msf.844.50.

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Exploitation of ambulances in contaminated conditions causes that they are exposed to damaging the surfaces. Steel components are protected from corrosion by metallic and paint coatings, e.g. selected parts of medical equipment are protected by Ni, Cr, Cu coatings and additionally by hot-dip galvanizing or zinc galvanic. The appearance of corrosion cells has a significant impact on the products sustainability.In the study the results of the research, regarding the application of innovative solutions from the field of the material science and medicine in the interior of modern ambulances are described. The aim of investigations was the proper selection of anticorrosion coatings appropriate to ambulance considering the sterility keeping and the best anticorrosion properties.

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12

Worsley, D. A., H. N. McMurray, J. H. Sullivan, and I. P. Williams. "Quantitative Assessment of Localized Corrosion Occurring on Galvanized Steel Samples Using the Scanning Vibrating Electrode Technique." Corrosion 60, no. 5 (May 1, 2004): 437–47. http://dx.doi.org/10.5006/1.3299239.

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Abstract Zinc and zinc alloy galvanized steel is used increasingly for structural cladding, automotive, and domestic appliance applications. In assessing the different galvanizing coatings, it is important to understand the nature of corrosion reactions occurring on the metal surfaces. To this end, the scanning vibrating electrode technique (SVET) has been used to study the effect of variation in metallic coating on the localization and intensity of corrosion reactions occurring on the bare metal surfaces when immersed in aerated 0.1% sodium chloride (NaCl). The samples used comprised pure zinc and galvanized steel substrates, namely electro-zinc (EZ), hot dip galvanized steel (HDG), iron (9%) zinc intermetallic (IZ), 5% aluminum zinc alloy (Galfan), and 55% aluminum zinc alloy (Zalutite). The SVET has the resolution and sensitivity to enable the number and intensity of active anodes to be quantified. Zinc galvanized materials show anodes, which do not deactivate within the 24 h of the test whereas zinc aluminum alloy anodes display typical anode lifetimes of 6 h to 12 h. The SVET data has been calibrated and integrated to provide a total current per scan and subsequently converted to zinc loss using Faraday's law. The total average mass losses obtained from 10-mm by 10-mm exposed areas were measured using the SVET: 1.133, 0.601, 0.432, 0.615, 0.264, and 0.051 mg for zinc, EZ, HDG, IZ, Galfan, and Zalutite, respectively, and these values were confirmed using inductively coupled plasma mass spectrometry (ICP-MS). The SVET data for zinc loss obtained over 24 h has been compared to external weathering data obtained after 2, 6, and 12 months of external exposure. There is an excellent correlation between metal runoff in initial external exposure and 24-h SVET experiments. In longer-term exposure, however, the IZ coating becomes covered in a metal hydr(oxide) layer, reducing runoff, and penetrative defects to the iron substrate in EZ lead to elevated runoff rates within 12 months.

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13

Murphy, Michael. "Hot-dip coating." Metal Finishing 94, no. 2 (February 1996): 38. http://dx.doi.org/10.1016/s0026-0576(96)93852-0.

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14

Murphy, Michael. "Hot-dip coating." Metal Finishing 95, no. 2 (February 1997): 39. http://dx.doi.org/10.1016/s0026-0576(97)94220-3.

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15

Murphy, Michael. "Hot-dip coating." Metal Finishing 93, no. 2 (February 1995): 45. http://dx.doi.org/10.1016/0026-0576(95)96074-0.

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16

Aizawa, Tatsuhiko. "Micro-Texturing onto Amorphous Carbon Materials as a Mold-Die for Micro-Forming." Applied Mechanics and Materials 289 (February 2013): 23–37. http://dx.doi.org/10.4028/www.scientific.net/amm.289.23.

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Among various kinds of carbon materials, two types of amorphous carbon were employed as a mold-die material for micro-forming. Diamond like carbon (DLC) has sufficient strength and toughness as a protective coating onto the steel and WC (Co) substrates. Glassy carbon is a solid material which also has high strength even at the elevated temperature under inert gas atmosphere. These two materials are selected to fabricate the micro-textured mold-die as a mother tool to duplicate this micro-textured pattern onto the metallic and polymer sheets via table-top CNC micro-forming systems. High density oxygen-plasma etching and pico-second laser machining were developed to make micro-texturing onto the above two mold-die materials. In the former, micro-groove and micro-grid patterns were formed on the DLC coating; table-top CNC stamping system with CNC-feeder and cropper was used to duplicate these patterns onto the aluminum sheets in dry and at the room temperature. In the latter, micro-wedge patterns were imprinted onto the glassy carbon substrate; table-top CNC mold-stamping system with heating equipment was utilized for duplication of these patterns onto thermoplastic polymer sheets above the glass transition temperature. Formation of micro-textures onto these amorphous carbon materials provides us a new tool to fabricate the micro-patterned parts and devices in mass production via cold and hot stamping processes.

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17

KANAMARU, Tatsuya. "Special issue/Hot dip coating. Hot-dip galvanized steel sheet." Journal of the Surface Finishing Society of Japan 42, no. 2 (1991): 152–59. http://dx.doi.org/10.4139/sfj.42.152.

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18

KITTAKA, Toshiharu. "Special issue/Hot dip coating. Hot-dip Al coated steel sheet." Journal of the Surface Finishing Society of Japan 42, no. 2 (1991): 169–77. http://dx.doi.org/10.4139/sfj.42.169.

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19

NAKAMURA, Ichiro. "Special issue/Hot dip coating. Hot dip galvanizing of structural steel members." Journal of the Surface Finishing Society of Japan 42, no. 2 (1991): 186–92. http://dx.doi.org/10.4139/sfj.42.186.

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20

Xiong, Zi Liu, Hong Qiang Liu, Xue Hui Wang, Yi Cui, Jie Xue, and Jian Ying Li. "Research on Elements Distribution in Hot Dip Aluminum Silicon Coating of Hot Stamping Steel." Advanced Materials Research 1063 (December 2014): 73–77. http://dx.doi.org/10.4028/www.scientific.net/amr.1063.73.

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Al-Si coating in different hot dip process conditions were made by a hot-dip galvanizing simulator, and distribution regularities of chemical elements in coating were studied by means of GDS, SEM, EDS and XRD. The results show that the hot dip temperature has no obvious impact on elements distribution in coating, but has some impact on Si content in surface coating. The hot dip time has no obvious impact on surface coating element content, but has distinct impact on deep coating element content. With the hot dip time increasing, Al content decreases, Fe content increases, and Si content decreases. Al-Si coating is composed of 3 layers, surface layer contains fine and close Al2O3 film, which has good anti-oxidation property on high temperature and hot stamping property, middle layer contains high melting point phase ,such as rich Fe phase , FeAl3 ,which has excellent anti-oxidation property on high temperature. The elements in diffusion layer can even be transited to basic steel, so coating has good adhesion property.

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21

Černý, Michal, and Petr Dostál. "Adhesion of Zinc Hot-dip Coatings." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 62, no. 1 (2014): 53–64. http://dx.doi.org/10.11118/actaun201462010053.

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The work is focused on verification of quality adhesion of zinc coating. It describes elements which affect quality and adhesive solidity within the coating. For assessment itself it will be neccessary to get know the basic elements which can affect adhesion of hot-dip coating which will be essential for choosing suitable samples for verification itself. These elements characterise acoustic responses during delamination coating. They affect elements influencing progress of signal. In research there is also a summary of existing methods for testing adhesion of coatings. As a result a new proposal of a new method comes out for purpose of quality testing of adhesion zinc hot-dip coating. The results of verification of this method are put to scientific analysis and findings lead to assessment of proposed method and its application in technical practise.The goal of this contribution is also include to proposed methodology testing adhesion zinc coating by nondestructive diagnostic method of acoustic emission (AE), which would monitor characterise progress of coating delamination of hot-dip zinc from basic material in way to adhesion tests would be practicable in situ. It can be enabled by analysis and assessment of results acquired by method AE and its application within verification of new method of adhesion anti-corrosive zinc coating.

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22

Jiang, She Ming, Chong Feng Yue, and Qi Fu Zhang. "Coating Structure and Corrosion Resistance Behavior of Hot Dip Zn-Al-Mg-Si Alloy Coating Steel Sheet." Advanced Materials Research 834-836 (October 2013): 601–8. http://dx.doi.org/10.4028/www.scientific.net/amr.834-836.601.

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Hot Dip Zn-6Al-3Mg-0.2Si coating steel sheet was prepared in laboratory by Hot-dip Galvanizing Simulator produced by National Engineering Lab of Advanced Coating Technology for Metal Materials. The surface and cross sectional microstructure of the samples were analyzed by using SEM and EDS. Hot dip Zn coated, 55Al-43.3Zn-1.6Si and Zn-6Al-3Mg-0.2Si coated steel sheet samples were exposed to standardized salt spray test. The Zn-6Al-3Mg-0.2Si coating and its erode production were investigated by XRD. The results showed that the hot dip Zn-6Al-3Mg-0.2Si coating had better corrosion resistance than ordinary galvanized layer.

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23

ASAKAWA, Ken-ichi, and Makoto YOSHIDA. "Special issue/Hot dip coating. Terne coating steel sheet." Journal of the Surface Finishing Society of Japan 42, no. 2 (1991): 178–85. http://dx.doi.org/10.4139/sfj.42.178.

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24

Bikulčius, G., A. Ručinskiené, and E. Matulionis. "Characteristics of Hot-dip Zinc Coating Measurement." Transactions of the IMF 81, no. 2 (January 2003): 73–74. http://dx.doi.org/10.1080/00202967.2003.11871493.

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25

Hao, Chen Gang, Han Qing Liang, Jian Min Zeng, Jun Chen, Ping Chen, and Jian Qiang Xiao. "A Study of Double-Coating of Hot-Dip Aluminizing." Applied Mechanics and Materials 217-219 (November 2012): 1221–24. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1221.

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Double-coating of hot-dip aluminizing is a process of protecting steel from being oxidized. The process is featured that the component is firstly hot-dip galvanized and finally hot-dipped with aluminum. The comparison of interface morphology was conducted for single hot-dip aluminizing and double-coating of hot-dip aluminizing on Q235 steel sheets. The metallographies of the cross-sections were observed and analyzed with SEM, XRD and EDS, respectively for the specimens prepared by the two processes. The experimental results indicate that there is no Zn-Fe alloy layer formed in the double-coating, and both single and double coating have similar phase compositions. However, the interface between the alloy layer and the steel matrix is smoother for the double-coating than that for single-coating.

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26

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

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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.

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27

KONDO, Takaaki. "Special issue/Hot dip coating. The present and future trends in the hot-dip plating." Journal of the Surface Finishing Society of Japan 42, no. 2 (1991): 144–51. http://dx.doi.org/10.4139/sfj.42.144.

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28

Zhang, Jie, and Zhen Hua Yu. "Corrosion Performance of Hot Dip Galvanized Steel." Advanced Materials Research 201-203 (February 2011): 2611–14. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2611.

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A method of EIS measure-polarization-relaxation was used to investigate the corrosion performance of different hot-dip coating layers of galvanized steel. The result showed that the corrosion of hot dip galvanized steel was divided into four phases, and the corrosion of each phase was corresponded to different layer respectively. The anti-corrosion difference of every layer was very distinct. The optimal anti-corrosion layer of hot dip galvanized steel was δ phase. This method could be used to detect coating corrosion quickly.

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29

TAKEISHI, Yoshiaki, Akiyoshi YAMAUCHI, and Sumitaka MIYAUCHI. "Gas Wiping Mechanism in Hot-Dip Coating Process." Tetsu-to-Hagane 81, no. 6 (1995): 643–48. http://dx.doi.org/10.2355/tetsutohagane1955.81.6_643.

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30

Zhang, Hui, M. Karim Moallemi, and Sunil Kumar. "Thermal Analysis of the Hot Dip-Coating Process." Journal of Heat Transfer 115, no. 2 (May 1, 1993): 453–60. http://dx.doi.org/10.1115/1.2910698.

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In this study a thermal analysis is performed on the hot dip-coating process where solidification of metal occurs on a bar moving through a finite molten bath. A continuum model is considered that accounts for important transport mechanisms such as axial heat diffusion, buoyancy, and shear-induced melt motion in the bath. A numerical solution procedure is developed, and its predictions are compared with those of an analytical approximate solution, as well as available experimental data. The predictions of the numerical scheme are in good agreement with the experimental data. The results of the approximate solution, however, exhibit significant disagreement with the data, which is attributed to the simplifying assumptions used in its development. Parametric effects of the bath geometry, and initial and boundary temperatures and solid velocity, as characterized by the Reynolds number, Grashof number, and Stefan numbers, are presented.

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31

Chen, Jiang, Guang Ze Dai, Jun Wen Zhao, Xing Min Huang, and Jing Han. "Optimization of Process Parameters of Hot-Dip Aluminized Coating." Advanced Materials Research 391-392 (December 2011): 46–50. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.46.

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The hot-dip aluminized process parameters with respect to the thickness and microstructure of intermetalic layer were investigated using a uniform design of experiments. The measured thickness of intermetalic layer was regressed as first- to third-order polynomial equations of four related parameters, i.e. hot-dip temperature, hot-dip time, diffusion treatment temperature and diffusion treatment time. It was found that the third-order regressed equation was acceptable and appropriate to identify the influences of the investigated parameters on the thickness of intermetalic layer. Comprehensive analysis of the results based on the regressed equation and microstructure could supply believable and optimized process parameters.

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32

Hui, Lian, Guo Xin Li, Yi Liang Peng, and Shan Jing Xia. "The Effects of Two Anti-Corrosion Processing Mode on the against Slip Coefficient between Friction Surface of High-Strength Bolts Connection." Advanced Materials Research 594-597 (November 2012): 1046–49. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.1046.

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Both hot-dip coating and zinc-rich coating can improve the longevity of the steels, but the coarseness of the steels covered the different coating will be different. The steels with the two coatings, a sort of hot-dip high-strength bolts connection were used to study the against slip coefficient between frictions. The results show that a higher against slip coefficient between frictions of high-strength bolts connection with zinc-rich coating was obtained. When MoS2was used on the hot-dip high-strength bolts, the standard deviation of the torque coefficient of the bolt connection pairs was decreased and a highest against slip coefficient between frictions was obtained.

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Peng, Yi Liang, Guo Xin Li, Lian Hui, and Shan Jing Xia. "The Properties of High Strength Bolt Connection Pairs with Hot-Dip Coating." Advanced Materials Research 594-597 (November 2012): 1042–45. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.1042.

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Hot-dip coating can improve the longevity of the bolt connection pairs, but may be influence the pairs on the torque coefficient and tensile load. The torque coefficient and tensile loads of three specifications, two strength degrees and two surface states with and without hot-dip coating bolt connection pairs were tested. The results showed both the mean and standard deviation of torque coefficient of the bolt connection pairs were enhanced in case of the hot-dip zinc process, deals with the lubricant MoS2 they were both decreased and closed to the standard values. By contrast, the tensile loads were unaffected by the hot-dip process.

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HOBOH, Yoshihiko. "Special issue/Hot dip coating. Hot-dipped Zn-Al coated steel." Journal of the Surface Finishing Society of Japan 42, no. 2 (1991): 160–68. http://dx.doi.org/10.4139/sfj.42.160.

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Chang, Jun-Kai, Chao-Sung Lin, Wei-Jen Cheng, I.-Hsuang Lo, and Woei-Ren Wang. "Oxidation resistant silane coating for hot-dip galvanized hot stamping steel." Corrosion Science 164 (March 2020): 108307. http://dx.doi.org/10.1016/j.corsci.2019.108307.

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Deering, Joseph, Amanda Clifford, Andrew D'Elia, Igor Zhitomirsky, and Kathryn Grandfield. "Composite dip coating improves biocompatibility of porous metallic scaffolds." Materials Letters 274 (September 2020): 128057. http://dx.doi.org/10.1016/j.matlet.2020.128057.

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Dugasz, J., and A. Szasz. "Metallic Coatings on Nonwovens for Special Purposes." Journal of Coated Fabrics 22, no. 1 (July 1992): 42–52. http://dx.doi.org/10.1177/152808379202200105.

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A special, highly adhesive metallic coating has been developed for nonwovens. The coating process has been developed for various substrata as: polyamid, polyester, glass-fiber cellulose and other natural fibers (or their mixtures), and their nonwoven counterparts. The coating itself is an autocatalytic, finishing process, requiring only dip-technologies (like a standard dyeing) on the finely adjusted textile.

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Ambrosetti, Matteo, Riccardo Balzarotti, Cinzia Cristiani, Gianpiero Groppi, and Enrico Tronconi. "The Influence of the Washcoat Deposition Process on High Pore Density Open Cell Foams Activation for CO Catalytic Combustion." Catalysts 8, no. 11 (November 2, 2018): 510. http://dx.doi.org/10.3390/catal8110510.

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Spin coating was evaluated as alternative deposition technique to the commonly used dip coating procedure for washcoat deposition on high-porosity metallic substrates. By using spin coating, the washcoating of metallic open cell foams with very high pore density (i.e., 580 μm in cell diameter) was finely controlled. Catalytic performances of samples prepared with conventional dip coating and spin coating were evaluated in CO catalytic combustion in air, using palladium as active phase and cerium oxide as carrier. The incipient wetness method was used to prepare catalytic powder, which was dispersed by means of an acid-free dispersing medium. After washcoating, deposited layers were evaluated by optical microscopy and adhesion test. In comparison to dip-coated samples, the use of spin coating demonstrated better performances from both catalytic and coating quality points of view, highlighting the possibility of the industrial adoption of these supports for process intensification in several catalytic applications.

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Zhao, Zhi Gang, Xiu Lin Ji, Hai Shuai Wang, and Shu Qi Wang. "Microstructure and Erosion Resistance of Hot-Dip-Aluminized 3Cr13 Steel." Advanced Materials Research 750-752 (August 2013): 2008–11. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.2008.

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Fe-Al intermetallic coating was prepared on 3Cr13 steel by hot-dip aluminizing and diffusion process. The morphology and phase of the coating were analyzed; the erosion behavior of hot-dip-aluminized 3Cr13 steel was investigated. Results showed that the thickness of the coating increased with diffusion temperature, but decreased when diffusion temperature exceeded 800°C. The Fe-Al alloy layer diffused at 900°C presented compacted microstructure, and mainly contained FeAl and a few Fe3Al. Fe-Al intermetallic coating possessed obviously declined erosion loss compared with unaluminized 3Cr13 steel and represented typical erosion characteristics of ductile material.

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Li, Shiwei, Bo Gao, Ganfeng Tu, Yi Hao, Liang Hu, and Shaohua Yin. "Study on the Corrosion Mechanism of Zn-5Al-0.5Mg-0.08Si Coating." Journal of Metallurgy 2011 (June 1, 2011): 1–5. http://dx.doi.org/10.1155/2011/917469.

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A new type of hot-dip Zn-5Al-0.5Mg-0.08Si and Zn-5Al alloy coatings was performed on the cold rolled common steel. The hot-dip process was executed by self-made hot-dip galvanising simulator. SEM and EDS test results demonstrated that Mg was mainly distributed in crystal boundaries. XRD test results showed that the corrosion product of Zn-5Al-0.5Mg-0.08Si alloy coating was almost Zn5(OH)8C12⋅H2O. The features of Zn5(OH)8C12⋅H2O are low electric conductivity, insolubility and good adhesion.The corrosion resistance of alloy-coated steels was detected by neutral salt spray test. The microstructural characterization of the coating surface after neutral salt spray test and removing the corrosion products revealed that the corrosion process of Zn-5Al-0.5Mg-0.08Si coating was uniform and the coating surface was almost flat. As a result, the corrosion resistance of Zn-5Al-0.5Mg-0.08Si coating has a remarkable improvement with a factor of 9.2 compared with that of Zn-5Al coating.

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Jędrzejczyk, Dariusz, and Elżbieta Szatkowska. "The Impact of Heat Treatment on the Behavior of a Hot-Dip Zinc Coating Applied to Steel During Dry Friction." Materials 14, no. 3 (January 31, 2021): 660. http://dx.doi.org/10.3390/ma14030660.

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The analyzed topic refers to the wear resistance and friction coefficient changes resulting from heat treatment (HT) of a hot-dip zinc coating deposited on steel. The aim of research was to evaluate the coating behavior during dry friction after HT as a result of microstructure changes and increase the coating hardness. The HT parameters should be determined by taking into consideration, on the one hand, coating wear resistance and, on the other hand, its anticorrosion properties. A hot-dip zinc coating was deposited in industrial conditions (according EN ISO 10684) on disc-shaped samples and the chosen bolts. The achieved results were assessed on the basis of tribological tests (T11 pin-on-disc tester, Schatz®Analyse device, Sindelfingen, Germany), microscopic observations (with the use of optical and scanning microscopy), EDS (point and linear) analysis, and microhardness measurements. It is proved that properly applied HT of a hot-dip zinc coating results in changes in the coating’s microstructure, hardness, friction coefficient, and wear resistance.

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Dumont, M., R. Ernst, Y. Fautrelle, B. Grenier, J. J. Hardy, and M. Anderhuber. "New DC electromagnetic wiping system for hot‐dip coating." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 30, no. 5 (September 13, 2011): 1663–71. http://dx.doi.org/10.1108/03321641111152810.

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Gao, Bo, Shi Wei Li, Yi Hao, Gan Feng Tu, Liang Hu, and Shao Hua Yin. "The Corrosion Mechanism of Zn-5%Al-0.3%Mg Coating." Advanced Materials Research 189-193 (February 2011): 1284–87. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.1284.

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A new hot dip Zn-5%Al-0.3%Mg alloy coating was performed on cold rolled common steel. The hot-dip process was executed by self-made hot dip galvanising simulator (China patent, No.201010160353). The corrosion resistance of alloy-coated steels was detected by neutral salt spray test . SEM and EDS test results demonstrate that Mg is mainly distributed in the crystal boundary. XRD test results shows corrosion product of Zn-5%Al-0.3%Mg alloy coating is mainly Zn5(OH)8Cl2•H2O. The characteristic of Zn5 (OH)8Cl2•H2O is dense and insoluble, so it is protective. In order to study the anticorrosion mechanism, all the tests of the Zn-5%Al-0.3%Mg alloy were carried out with Zn-5%Al coating together.

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Bajat, Jelena, Vesna Miskovic-Stankovic, Jovan Popic, and Dragutin Drazic. "The adhesion of epoxy cataphoretic coating on phosphatized hot-dip galvanized steel." Chemical Industry 60, no. 11-12 (2006): 316–20. http://dx.doi.org/10.2298/hemind0612316b.

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The influence of hot-dip galvanized steel surface pretreatment on the adhesion of epoxy cataphoretic coating was investigated. Phosphate coatings were deposited on hot-dip galvanized steel and the influence of fluoride ions in the phosphating plating bath, as well as the deposition temperature of the plating bath, were investigated. The dry and wet adhesion of epoxy coating were measured by a standard pull-off method. The surface roughness of phosphatized galvanized steel was determined, as well as the wettability of the metal surface by emulsion of the epoxy resin in water. The adhesion of epoxy coatings on phosphatized hot-dip galvanized steel was investigated in 3wt.%NaCI.

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KOECH, Pius Kibet, and Chaur Jeng WANG. "Performance Characteristics of Hot-dip and Plasma Spray Aluminide Coated Nickel-Based Superalloy 718 under Cyclic Oxidation in Water Vapour." Materials Science 25, no. 4 (June 27, 2019): 413–21. http://dx.doi.org/10.5755/j01.ms.25.4.21334.

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Aluminium coating due to its ability to form stable alumina oxide scale are commonly used to protect materials such as inconel 718 superalloys at high operational temperatures. Relevant properties of the oxide scale formed; growth rate and coating adherence is not only determined by the composition of the coating material used but is also influenced by the coating manufacturing process and the test condition. In the present work, effect of water vapour and thermocycling commonly prevailing on the morphology and composition of the alumina scales formed during high temperature oxidation was studied using hot-dip and plasma spray aluminium coatings. The coatings highly improved oxidation resistance of the alloy substrate with hot dip coating showing the lowest mass change compared to plasma spray. The results also show that the hot-dip coating has an inherently different morphology and growth rate compared to those formed on the plasma spray coating. High rate of oxidation, spallation and large voids with little protective alumina oxide layer were observed in moist condition test especially in plasma spray coatings.

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Li, Guo Xin, Shan Jing Xia, and Yi Liang Peng. "Anti-Corrosion Performance of Four Hot Dip Galvanizing Bolts." Applied Mechanics and Materials 395-396 (September 2013): 708–11. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.708.

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The hot-dip galvanizing coating can promote the anti-corrosion performance of the bolts in outdoor steel structure engineering. But the anti-corrosion performance cannot match that of the steel due to the centrifugal process. In this paper, the anti-corrosion performance of four kinds of bolts obtained from different company was researched by the neutral salt spray test method. The results show that the anti-corrosion performance of the all four bolts was unsatisfactory. The reasons were studied through testing the thickness of the coating, coating uniformity, surface morphology and elemental composition. The results show that the causes are the lower thickness of the hot-dip coatings, too much defects on the surface of the coatings and the elemental composition impurity.

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Honda, Kazuhiko, Kohsaku Ushioda, and Wataru Yamada. "Mechanism on Heterogeneous Nucleation of the Primary Al Phase on TiAl₃ of a Hot-Dip Zn-11%Al-3%Mg-0.2%Si Coating on Steel Sheet." Materials Science Forum 638-642 (January 2010): 2787–92. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.2787.

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The solidification structure of a hot-dip Zn-11%Al-3%Mg-0.2%Si coating with a Ti addition on a steel substrate was investigated. Steel sheet was coated using a laboratory hot-dip galvanizing simulator. The coating was subsequently characterized via optical and high resolution scanning electron microscopy with EBSD and high temperature X-ray diffractometry. The hot-dip coating consisted of a combination of a Zn/Al/MgZn2 ternary eutectic structure, primary Al phase and MgZn2 phase. TiAl3 acts as a heterogeneous nucleation site for Al, which was shown to have perfect lattice coherency with TiAl3 as epitaxial Al growth from the TiAl3 was found. The growth direction of Al is along <110> and has a random texture, whereas Zn has a rather strong ND//<0001> fiber texture.

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48

Bondareva, Olga. "Study of the Temperature Effect on the Structure and Thickness of Hot-Dip Zinc Coatings on Fixing Products." Applied Mechanics and Materials 698 (December 2014): 355–59. http://dx.doi.org/10.4028/www.scientific.net/amm.698.355.

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Hot-dip galvanizing of steels is usually performed by immersing the metal in a bath with molten zinc in the temperature range from 450 to 460 °C. In some cases it is necessary to obtain a minimal coating thickness. For example, high-strength bolts and other fixing products require a minimal thickness of the coating because a too thick zinc coating requires additional work on re-threading, which leads to spalling of coatings, a loss of corrosion resistance and, consequently, failure of the entire product. The main aim of this work was to study the influence of elevated temperatures of hot-dip galvanizing on the thickness and microstructure of zinc coatings on bolts and nut preform. The microstructure and elemental composition of the coating were studied by scanning electron microscopy and energy dispersion X-ray microanalysis. It was found that the coating thickness obtained in the range between 475 and 535°C decreases with temperature and reaches a minimum at 535°C. The structure of the coating after high-temperature hot-dip galvanizing was fundamentally different from the structure of the coating made at standard temperatures 450-460°C. This coating formed at 535°C was dense, homogeneous, non-porous and composed of a mixture of the δ and ζ-phases without distinct phase boundaries. That’s why it was recommended to maintain the bath temperature in the range between 533°C and 537°C. It allows us to obtain a hot-dip galvanized coating of a minimal thickness and a good quality on fixing products.

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Kopyciński, Dariusz, and Edward Guzik. "Intermetallic Phases Formation in Hot Dip Galvanizing Process." Solid State Phenomena 197 (February 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.

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Du, An, Rui Na Ma, Yong Zhe Fan, Peng Zheng, and Xiao Ming Cao. "Study of Process of Hot-Dipped Galfan Coating on Q235 Structural Steel." Applied Mechanics and Materials 665 (October 2014): 85–89. http://dx.doi.org/10.4028/www.scientific.net/amm.665.85.

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A different production method including a formulated flux has been devised to hot-dip Q235 Galfan alloy coating on structural steel. The microstructure and composition of the Galfan coatings, applied by the hot dip process, was performed using SEM and EDS technology to evaluate the coating thickness and its relationship with technological parameters. The experimental results showed that the coating of specimen has eutectic crystal shape and its thickness is thinner than Zinc coatings’ scale. Moreover, the Galfan plating does not grow with the extension of time for immersion. The temperature of immersion and the extraction speed will affect the coating thickness too.

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