Hot-dip galvanizing

Kuklík, Vlastimil; Kudláček, Jan

doi:10.1016/b978-0-08-100753-2.00002-1

Cited by 25 publications

(28 citation statements)

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“…"Spin-galvanizing" is the galvanizing process that is typically used to galvanize small articles such as fasteners [26]. Fasteners are put into a chemically resistant plastic container for pre-treatment process [31]. After soaking and drying, the fasteners are then loaded into a cylindrical basket, followed by immersion into the zinc bath.…”

Section: Hot-dip Galvanizing Processmentioning

confidence: 99%

Deposition processes and properties of coatings on steel fasteners — A review

2019

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Mechanical fastening is widely used in joining metals, particularly in automotive, aerospace, building and construction industries. However, the main concern on mechanical fastening is the issue of corrosion. An effective way to prolong the service life of steel fasteners is to apply protective coatings onto these components. This paper reviews and compares a few common coating deposition techniques, i.e., electroplating, hot-dip galvanizing, ion vapour deposition and mechanical plating, in terms of their characteristics. Compositional and microstructural properties including morphology and porosity, corrosion resistance performance and frictional performance of the coatings formed by each process are discussed in details. Hydrogen embrittlement, a premature failure often occurred on high strength steel fasteners, is also reviewed. The key results of recent studies of various metallic coatings on fasteners are presented to provide a fundamental understanding of the evolving topics, and the research gaps have been identified for further investigation.

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Section: Hot-dip Galvanizing Processmentioning

confidence: 99%

Deposition processes and properties of coatings on steel fasteners — A review

2019

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“…Las fallas en los recubrimientos galvanizados en caliente han sido relacionadas con los esfuerzos residuales que se generan en la fabricación de los mismos. Las microgrietas inducidas en el proceso de solidificación ocurren a menudo en el recubrimiento galvanizado debido al gran desajuste entre los coeficientes de expansión térmica del recubrimiento de zinc y el sustrato de acero, esto puede influir significativamente en la densidad de grietas que se forman en la capa de zinc, y en la posterior delaminación del recubrimiento bajo carga [3].…”

Section: Introductionunclassified

Evaluación de propiedades mecánicas en recubrimientos galvanizados por doble inmersión en caliente sobre acero al carbono

Carrasquero

Minchala

2019

ings

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Poco se conoce sobre las condiciones operacionales, la microestructura y propiedades de los recubrimientos fabricados por doble inmersión en caliente. Este trabajo tiene como objetivo evaluar propiedades mecánicas de recubrimientos Zn/Zn-5%Al aplicados por la técnica de doble inmersión en caliente, variando los tiempos de inmersión en los baños líquidos. Para la evaluación se realizaron perfiles de microdureza Vickers y ensayos de doblez. Los perfiles de microdureza para diferentes tiempos de inmersión presentan similitudes, mostrando gran heterogeneidad debido a las características microestructurales. Se observa que al aumentar el tiempo de inmersión disminuye el ángulo crítico y el tiempo de inmersión no influye significativamente en la densidad de grietas confinadas y no confinadas. Se concluye que la ductilidad de los recubrimientos se ve influenciada por el espesor total de los mismos, y posiblemente por el espesor de las diferentes zonas y esfuerzos residuales, siendo las muestras recubiertas con tiempo de inmersión de 60 segundos, las que presentan mejor comportamiento ante el ensayo de doblez.

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“…Additionally, because of the high value of the undercooling ΔT, it has been assumed that the isothermal crystallization of individual intermetallic phases is proceeding in a dynamic mode [1][2][3][4][5][6][7][8][9][10][11][12]. An important factor that affects the growth of the protective layer is flux [4].…”

Section: Introductionmentioning

confidence: 99%

Shaping optimal zinc coating on the surface of high-quality ductile iron casting. Part II – Technological formula and value of diffusion coefficient

Kopyciński¹,

Guzik²,

Szczęsny³

2017

Archives of Metallurgy and Materials

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The completed research presented in the first part of the article has allowed linking the manufacturing technology of ductile iron castings with the process of hot dip galvanizing. On the basis of these data simulations were carried out to examine the behaviour of zinc diffusion coefficient D in the galvanized coating. The adopted model of zinc coating growth helped to explain the cases of excessive growth of the intermetallic phases in this type of coating. The paper analyzes covered the relationship between the roughness and phase composition of the top layer of product and the thickness and kinetics of zinc coating growth referred to individual sub-layers of the intermetallic phases.Roughness and phase composition in the surface layer of product were next related to the diffusion coefficient D examined in respective sublayers of the intermetallic phases.

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Hot-dip galvanizing

Cited by 25 publications

References 0 publications

Deposition processes and properties of coatings on steel fasteners — A review

Deposition processes and properties of coatings on steel fasteners — A review

Evaluación de propiedades mecánicas en recubrimientos galvanizados por doble inmersión en caliente sobre acero al carbono

Shaping optimal zinc coating on the surface of high-quality ductile iron casting. Part II – Technological formula and value of diffusion coefficient

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