Analysis of the Al and Ti additions influences on phases generation and damage in a hot dip galvanizing process

Bellini, Costanzo; Carlino, Francesco; Natali, S.

doi:10.1016/j.prostr.2019.08.216

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…Cooling in the air not only allows for the free oxidation of the surface but also the further transformation in the solid phase of the coating and the diffusion of elements [ 20 ]. Zinc coatings have also been obtained in baths with 1 wt.% Ti, but it appears that such a high content promotes the growth of large Zn-Fe-Ti intermetallic phase precipitates (this also has an adverse effect on the mechanical properties and the formation of stresses within the coating [ 22 ]). In addition, such a Ti content in a bath also leads to the intense oxidation of the metal mirror [ 22 ].…”

Section: Methodsmentioning

confidence: 99%

“…Zinc coatings have also been obtained in baths with 1 wt.% Ti, but it appears that such a high content promotes the growth of large Zn-Fe-Ti intermetallic phase precipitates (this also has an adverse effect on the mechanical properties and the formation of stresses within the coating [ 22 ]). In addition, such a Ti content in a bath also leads to the intense oxidation of the metal mirror [ 22 ]. An analysis of the literature also pointed to a paper that included a 0.5 wt.% addition.…”

Section: Methodsmentioning

confidence: 99%

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Evaluation of Effect of Ti Addition to Zinc Bath on Kinetics of Growth of Alloy Layer Formed in Process of Hot-Dip Galvanisation on Steel Substrate

Bracka-Kęsek,

Szczęsny,

Guzik

et al. 2023

Materials

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Faced with the raw material crisis in Zn resources, researchers are facing the challenge of developing technology for producing zinc coatings that are thinner than those that have been produced to date. This would make it possible to reduce Zn consumption in the hot-dip galvanisation process. The study included an experiment that involved dip galvanising steel samples in baths of different Ti concentrations; this process was carried out at 450 °C and 550 °C. The use of this additive made it possible to reduce the growth of the alloy layer in the obtained zinc coatings. Using an optical microscope, observations were made of the microstructures of the resulting coatings, which made it possible to determine the thickness of the alloy layer in the coating. Thanks to the use of scanning electron microscopy with EDS analysis, however, it was possible to plot the chemical composition of the studied coatings and accurately observe the morphology of the formed phases. An intermetallic Zn-Fe-Ti phase was observed in the coatings formed in a Ti-added bath, which can affect the growth inhibition of the alloy layer in the zinc coating.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Evaluation of Effect of Ti Addition to Zinc Bath on Kinetics of Growth of Alloy Layer Formed in Process of Hot-Dip Galvanisation on Steel Substrate

Bracka-Kęsek,

Szczęsny,

Guzik

et al. 2023

Materials

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“…Although hot-dip galvanized steel structures are gaining popularity in various industries, there are still some reservations about the use of hot-dip galvanized steel in some applications such as structural steel members in bridges due to limited knowledge of their fatigue behavior and design recommendations [ 1 , 2 , 3 ]. Hot-dip galvanizing produces a coating layer comprised of different intermetallic phases of distinct mechanical properties [ 4 , 5 ]. The microstructure of the plating layer from a conventional zinc bath is comprised of a thin gamma (Γ) phase, which forms an interphase with the steel substrate, followed by the delta (δ) phase, then the zeta phase (ζ) phase, and the eta phase (η) made of pure zinc is at the outermost surface [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Properties of Hot-Dip Galvanized AISI 1020 Normalized Steel in Tension–Compression and Tension–Tension Loading

et al. 2021

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Since hot-dip galvanizing causes a heat effect on cold-worked steel substrate and produces a coating layer comprised of distinct phases with varying mechanical properties, the fatigue mechanism of hot-dip galvanized steel is very complex and hard to clarify. In this study, AISI 1020 steel that has been normalized to minimize susceptibility to the heat effect was used to clarify the effect of the galvanizing layer on the tensile and fatigue properties. The galvanizing layer causes a reduction in the yield point, tensile strength, and fatigue strength. The reduction in the fatigue strength was more significant in the high cycle fatigue at R = 0.5 and 0.01 and in the low cycle fatigue at R = 0.5. The galvanizing layer seems to have very little effect on the fatigue strength at R = −1.0 in the low and high cycle fatigue. Since the fatigue strengths at R = 0.01 and −1.0 in the low cycle fatigue were strongly related to the tensile strength of the substrate, the cracking of galvanized steel was different than that of non-galvanized steel. The fatigue strength of galvanized steel at R = 0.5 dropped remarkably in the low cycle fatigue in comparison to the non-galvanized steel, and many cracks clearly occurred in the galvanizing layer. The galvanizing layer reduced the fatigue strength only under tension–tension loading. We believe that the findings in this study will be useful in the fatigue design of hot-dip galvanized steel.

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Effect of a 0.05% Nickel Addition to Zinc Melt on the Mutual Diffusion Coefficient of Iron and Zinc in the Formation of a Zinc Coating

Bondareva,

Rosenstein,

Dobychina

2023

J. Surf. Investig.

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Analysis of the Al and Ti additions influences on phases generation and damage in a hot dip galvanizing process

Cited by 3 publications

References 11 publications

Evaluation of Effect of Ti Addition to Zinc Bath on Kinetics of Growth of Alloy Layer Formed in Process of Hot-Dip Galvanisation on Steel Substrate

Evaluation of Effect of Ti Addition to Zinc Bath on Kinetics of Growth of Alloy Layer Formed in Process of Hot-Dip Galvanisation on Steel Substrate

Fatigue Properties of Hot-Dip Galvanized AISI 1020 Normalized Steel in Tension–Compression and Tension–Tension Loading

Effect of a 0.05% Nickel Addition to Zinc Melt on the Mutual Diffusion Coefficient of Iron and Zinc in the Formation of a Zinc Coating

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