Electrochemical Behavior of Electrodeposited Zinc-Iron Alloys in Alkaline Solutions

SAGIYAMA, Masaru; Hiraya, Akira; Watanabe, Tsutomu

doi:10.2355/tetsutohagane1955.77.2_251

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…Увеличение содержания Fe выше 20 масс. % приводит к ускорению коррозии, а наиболее замедленным по данным [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58] процесс является при концентрации железа 10 масс. %.…”

Section: коррозия сплавных покрытий на основе Zn-feunclassified

“…Кроме того, предполагается [46], что при концентрации 10 масс. % Fe происходит ингибирование реакции восстановления O 2 в нейтральном растворе NaCl из-за образования барьерного слоя на основе Zn(OH) 2 , равномерно распределенного по поверхности покрытия и в отличие от полупроводникового ZnO [47] характеризующегося крайне низкой электронной проводимостью [46,50].…”

Section: коррозия сплавных покрытий на основе Zn-feunclassified

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Features of the corrosion of coatings based on zinc alloys: oxidation products and the selective dissolution of zinc. Review

Biryukov,

Kozaderov,

Batmanova

2024

kcmf

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The literature review analyses and systematizes the results of corrosion studies of widely used anti-corrosion zinc coatings based on various binary systems Zn-Al, Zn-Mg, Zn-Fe, Zn-Ni, Zn-Co. The patterns of corrosion, the role of selective dissolution and corrosion products in increasing the corrosion resistance of coatings in neutral chloride-containing environments have been studied. The analysis shows that the corrosion rate depends on the chemical and phase composition of zinc coatings, which is due to differences in the corrosion behavior of the phase components of the alloys. Selective dissolution has an ambiguous effect on the corrosion resistance of coatings. On the one hand, the process of selective dissolution of zinc can be accompanied by the formation of corrosion cracks, which reduces the corrosion resistance of thecoating. On the other hand, a rough surface enriched with an electropositive alloying component is formed. As a result, roughness stimulates the deposition of a denser and more compact layer of corrosion products, which reduces the access of oxygen and other electrolyte components to the coating’s surface. Under certain conditions, a film of corrosion products can provide additional resistance to the corrosion process due to low electrical conductivity. With the uniform dissolution of coatings, both the co-precipitation of complex compounds of zinc and alloying metals and the doping of the product layer with oxides or hydroxides of alloying metals occur. This also results in increased compactness and reduced electrical conductivity, which increases the corrosion resistance of the coatings. The purpose of the article: an overview of the resultsof studies of corrosion of zinc coatings, physical and chemical features of the formation and composition of the layer of corrosion products, the influence of corrosion products and selective dissolution on the corrosion resistance of coatings. A review of the results of studies relating to the corrosion of zinc coatings was carried out, taking into account the formation of a protective layer of corrosion products and the selective dissolution of zinc. The corrosion of zinc coatings is influenced by the structure and phase composition of the coatings, the selective dissolution of zinc, as well as the nature of the layer of corrosion products. The corrosion resistance of zinc coatings increases if a compact layer of corrosion products with low electrical conductivity is formed. The selective dissolution of zinc can have a positive effect on its protective ability due to the formation of a rough surface, which promotes the deposition of a denser layer of corrosion products. In the case of theuniform dissolution of zinc alloy coatings, alloying metals are able to integrate into the structure of zinc corrosion products, which makes the layer more compact and leads to a decrease in its electrical conductivity, significantly increasing the corrosion resistance of the coatings

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Section: коррозия сплавных покрытий на основе Zn-feunclassified

Features of the corrosion of coatings based on zinc alloys: oxidation products and the selective dissolution of zinc. Review

Biryukov,

Kozaderov,

Batmanova

2024

kcmf

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“…Experimental material was hot-dip galvanized high-strength IF steel sheet, thickness was 0.8 mm, galvanized coating weight was 45 g/m 2 in the single-sided, the composition of hot-dip high-strength IF steel sheet was shown in Table 1. Cut the plate to the same specs according to the experimental request, washed and dried in the air.…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

“…The zinc has the low site in the EMF [1,2], and it would result in more positive corrosion potential. The change way of corrosion potential and corrosion rate of zinc alloy is very complex in the galvannealed coating, it was not only influenced by Fe contents [3], but also influenced by the intermetallic phase and alloy fine texture [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Study on the Corrosion Resistance of Galvannealed Coatings on Different Alloying Parameters

Yuan¹,

Zhang²

2017

Proceedings of the Second International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2017)

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Abstract:The galvannealed coating with different Fe contents were prepared by controlling the galvannealed process parameters of hot-dip galvanized high-strength IF steel sheet, and analyzed the influence of Fe contents on the corrosion resistance of galvannealed coating. The results show that the corrosion resistance of galvannealed coating increased with the Fe content, and it was also influenced by the phase structure and the proportion of different phases in the galvannealed coating. At the same galvannealed temperature, along with the prolongation of galvannealed time, the initiative corrosion potential of galvannealed coating changed little. The compact Γ 1 phase in galvannealed coating could improve the corrosion resistance effectively. At the same galvannealed time, the corrosion resistance of galvannealed coating was better, when the galvannealed temperature was higher.

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Influence of galvannealed process on coating corrosion resistance of high strength IF steel

Hao

Chen

Wang

et al. 2008

Materials & Corrosion

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Analyzing the influence of different galvannealed process parameters on coating corrosion resistance of high strength IF steel indicated that corrosion resistance rose with the increase in iron content. Corrosion resistance was related to the phase structure of coating and the fraction of different phases. The appearance of compact G 1 phase indicated the great increase in coating corrosion resistance. At the same galvannealed time, coating corrosion resistance became better with the increase in the galvannealed temperature.

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Electrochemical Behavior of Electrodeposited Zinc-Iron Alloys in Alkaline Solutions

Cited by 5 publications

References 2 publications

Features of the corrosion of coatings based on zinc alloys: oxidation products and the selective dissolution of zinc. Review

Features of the corrosion of coatings based on zinc alloys: oxidation products and the selective dissolution of zinc. Review

Study on the Corrosion Resistance of Galvannealed Coatings on Different Alloying Parameters

Influence of galvannealed process on coating corrosion resistance of high strength IF steel

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