Synergistic influence of Al, Ni, Bi and Sn addition to a zinc bath upon growth kinetics and the structure of coatings

Kania, H.; Liberski, P.

doi:10.1088/1757-899x/35/1/012004

Cited by 23 publications

(17 citation statements)

References 8 publications

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“…Currently, these are multi-component zinc baths containing various alloying additives. Such additives are introduced to the zinc bath at the same time, which will result in [3,4]:…”

Section: Introductionmentioning

confidence: 99%

“…The addition of tin also improves the fluidity of zinc. Bi and Sn additives, often used together, favorably affect the quality of the coating [4]; however, with the spread of these baths, many cases of steel structure cracking as a result of the phenomenon of liquid metal embrittlement (LME) have appeared [17]. Studies in this field have shown that the cause of structure's cracking in liquid zinc may be the presence of Bi [18] and Sn [19] in the bath.…”

Section: Introductionmentioning

confidence: 99%

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Structural Aspects of Decreasing the Corrosion Resistance of Zinc Coating Obtained in Baths with Al, Ni, and Pb Additives

2020

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The article presented the results of tests determining the synergistic effect of Al, Ni, and Pb additions on a zinc bath on the structure and corrosion resistance of coatings obtained on low silicon steel. Analyzed coatings were produced on S235JRG2 steel with Si content of 0.02 mass%. The corrosion resistance of the coatings was compared with the corrosion resistance of the coating obtained in the "pure" zinc bath. Structure at high magnifications (SEM) was determined, as well as coating thickness and chemical composition in microspheres. The corrosion resistance of the coatings was established comparatively in standard corrosion tests in neutral salt spray and a humid atmosphere containing SO2. It was found that the addition of Pb to the zinc bath reduced the corrosion resistance of the coatings. In the coating structure obtained in the Zn-AlNiPb bath, lead precipitation was observed in both the outer layer and the intermediate layer of the coating. Grain boundaries were the preferred site for lead precipitation. The presence of Pb precipitates favored conditions for the creation of additional corrosion cells, which led to a decrease in the corrosion resistance of the coatings.

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“…Currently, these are multi-component zinc baths containing various alloying additives. Such additives are introduced to the zinc bath at the same time, which will result in [3,4]:…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Aspects of Decreasing the Corrosion Resistance of Zinc Coating Obtained in Baths with Al, Ni, and Pb Additives

2020

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“…Depending on the bath type and temperature, duration of the galvanising process, postgalvanising cooling methods, the type of steel, and surface preparation prior to galvanising, zinc coatings differ in terms of thickness, chemical composition, phase composition, morphology, crystallographic structure of the surface, appearance, mechanical and corrosion properties, etc. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Influence of Hot-Dip Galvanised Coating Morphology on the Adhesion of Organic Coatings Depending on the Zinc Bath Pb Content and the Postgalvanising Cooling Method

Nowicka-Nowak

Zubielewicz

Kania

et al. 2018

International Journal of Corrosion

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Hot-dip galvanised coatings used either alone or with an organic coating (duplex system) constitute an effective anticorrosion protection. Adhesion between the coating and the zinc substrate plays a vital role in the durability of the duplex system. Conditions of the galvanising process and alloying additives incorporated into the zinc bath influence mechanical and protective properties as well as thickness, structure, and surface morphology of the zinc coatings. The influence of the surface morphology of zinc coatings on the adhesion of organic coatings was studied. The tests were carried out on zinc coatings produced in baths with varying Pb content and by employing various cooling methods after the galvanising process. It was noted that a rapid cooling in water produces zinc coatings with a fine-grain structure, more suitable for paint application compared to the air-cooled ones, with a spangle.

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“…Zinc-aluminum coatings show better corrosion protection and the possibility of obtaining thinner coatings comparing to traditional zinc coatings. Aluminum protects both surface of the bath and the coating by creating passive layer [1,2]. What is more, it may be beneficial to obtain coatings from alloys containing a large amount of aluminum due to its higher volume than zinc and filling the same bath with a lower mass of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Structures of coatings obtained in a ZnAl23Mg3Si0.4 bath by the batch hot dip method

Kania¹,

́nska²

2018

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The paper presents the results of the tests on ZnAl23Mg3Si0.4 coatings obtained by use of the batch hot dip method. The growth kinetics of coatings obtained at the temperature of 520 • C on low-silicon steel has been defined. The structure has been developed, the chemical composition of structural components of the coatings and their phase composition have been established. It has been determined that coatings obtained in a ZnAl23Mg3Si0.4 bath are continuous and their average thickness ranges from 35.8 to 45.5 µm. The obtained coatings are composed of a diffusion layer of phase FeAl3 which contains Zn and Si and of an internal layer which contains solutions of Al and Zn as well as phases MgZn2 and Mg2Si.

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Synergistic influence of Al, Ni, Bi and Sn addition to a zinc bath upon growth kinetics and the structure of coatings

Cited by 23 publications

References 8 publications

Structural Aspects of Decreasing the Corrosion Resistance of Zinc Coating Obtained in Baths with Al, Ni, and Pb Additives

Structural Aspects of Decreasing the Corrosion Resistance of Zinc Coating Obtained in Baths with Al, Ni, and Pb Additives

Influence of Hot-Dip Galvanised Coating Morphology on the Adhesion of Organic Coatings Depending on the Zinc Bath Pb Content and the Postgalvanising Cooling Method

Structures of coatings obtained in a ZnAl23Mg3Si0.4 bath by the batch hot dip method

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