Effect of selective pre-oxidation on the growth and corrosion resistance of hot-dip zinc coating of nodular cast iron

Wu, Hui; Peng, Haoping; Ya, Liu; Tu, Hao; Wang, Jianhua; Su, Xuping

doi:10.1016/j.corsci.2021.109463

Cited by 14 publications

(4 citation statements)

References 31 publications

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“…When the Si content is higher than 0.3 Wt.%, the reaction activity is significantly increased. This is also the well-known Sandelin effect in the hot-dip galvanizing industry (Wu et al, 2021).…”

Section: Electrochemical Corrosion Behavior Of the F Layermentioning

confidence: 66%

A review of physical properties of hot-dip galvanized coating layer by layer and their respective electrochemical corrosion behavior

Li,

Zhou

et al. 2024

ACMM

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Purpose This paper aims to contribute to the performance improvement and the broader application of hot-dip galvanized coating. Design/methodology/approach First, the ability to provide barrier protection, galvanic protection, and corrosion product protection provided by hot-dip galvanized coating is introduced. Then, according to the varying Fe content, the growth process of each sublayer within the hot-dip galvanized coating, as well as their respective microstructures and physical properties, is presented. Finally, the electrochemical corrosion behaviors of the different sublayers are analyzed. Findings The hot-dip galvanized coating is composed of η-Zn sublayer, ζ-FeZn13 sublayer, δ-FeZn10 sublayer, and Γ-Fe3Zn10 sublayer. Among these sublayers, with the increase in Fe content, the corrosion potential moves in a noble direction. Research limitations/implications There is a lack of research on the corrosion behavior of each sublayer of hot-dip galvanized coating in different electrolytes. Practical implications It provides theoretical guidance for the microstructure control and performance improvement of hot-dip galvanized coatings. Originality/value The formation mechanism, coating properties, and corrosion behavior of different sublayers in hot-dip galvanized coating are expounded, which offers novel insights and directions for future research.

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Section: Electrochemical Corrosion Behavior Of the F Layermentioning

confidence: 66%

A review of physical properties of hot-dip galvanized coating layer by layer and their respective electrochemical corrosion behavior

Li,

Zhou

et al. 2024

ACMM

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“…As elucidated in references, [24,25] the Q235 steel plate sample was pre-treated. Initially, the sample was immersed in a 15% NaOH aqueous solution at 70 °C for 5 min to degrease the surface.…”

Section: Hot Dip Plating Processmentioning

confidence: 99%

The Effects of B on the Microstructure and Corrosion Resistance of Zn–6Al–3Mg Alloy Coating

Chen,

Liu,

et al. 2024

steel research int.

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Hot dip galvanized zinc‐aluminum‐magnesium steel plates are widely used in fields such as power communication, automotive manufacturing, and marine engineering due to their excellent corrosion resistance. The use of microalloying can further improve their corrosion resistance. The effects of B on the microstructure and corrosion resistance of Zn–6Al–3Mg (ZAM) alloy coatings are systematically examined. Data indicates that the eutectic structure of the coating progressively refines as B content increases, concomitant with a reduction in the thickness of the Fe2Al5 inhibition layer owing to the augmented formation of an Al‐rich phase at the surface. When the addition of B reaches 0.12%, the microstructure of the alloy coating is minimized, and there is no further reduction in the thickness of the Fe2Al5 inhibition layer. Moreover, the presence of B diminishes the corrosion current density and bolsters corrosion resistance. Optimal corrosion performance, indicated by maximal density and uniformity of surface corrosion products and the lowest corrosion current density, is achieved at a B addition of 0.12%. The judicious selection of B content is pivotal for enhancing the microstructural and anti‐corrosive properties of ZAM alloy coatings. Therefore, adding 0.12% B to ZAM alloy can effectively improve the microstructure and corrosion resistance of the alloy coating.

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“…Thus, the gray cast iron also turned into nodular cast iron. The microstructure consists of spherical graphite with a pearlite matrix [40,41].…”

Section: Addition Of Fesimg Compoundmentioning

confidence: 99%

MICROSTRUCTURE EVOLUTION AND HARDNESS IMPROVEMENT OF GRAY CAST IRON BY ADDITION OF FeSiMg FOLLOWED BY FLAME HARDENING PROCESS

Darmawan,

Anggono,

Yulianto

et al. 2023

Acta Metall Slovaca

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The addition of magnesium alloy elements followed by a flame-hardening process will change the phase configuration in gray cast iron. This study aims to investigate changes in microstructure and hardness due to these two processes. The addition of magnesium is conducted by adding FeSiMg as a carrier for magnesium. Metallographic examination to observe changes in microstructure was carried out using a Scanning Electron Microscope (SEM) and Energy-Dispersive X-ray Spectroscopy (EDS). The formed phase is examined by X-Ray Diffraction testing. The hardness test was carried out using the Vickers technique on the surface of the gray cast iron, the nodular cast iron, and the flame-hardened nodular cast iron. Whilst for flame-hardened nodular cast iron, the Vickers technique was also conducted on a cross-section. The addition of the FeSiMg compound changed flake graphite into spherical graphite with increased hardness from 130 VHN to 313.22 VHN. The flame-hardening process in nodular cast iron results in the formation of a martensite phase and the disappearance of graphite on the surface of the material. The hardness on the surface of the material due to the flame-hardening process increased by 82.4% compared to the substrate.

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Effect of selective pre-oxidation on the growth and corrosion resistance of hot-dip zinc coating of nodular cast iron

Cited by 14 publications

References 31 publications

A review of physical properties of hot-dip galvanized coating layer by layer and their respective electrochemical corrosion behavior

A review of physical properties of hot-dip galvanized coating layer by layer and their respective electrochemical corrosion behavior

The Effects of B on the Microstructure and Corrosion Resistance of Zn–6Al–3Mg Alloy Coating

MICROSTRUCTURE EVOLUTION AND HARDNESS IMPROVEMENT OF GRAY CAST IRON BY ADDITION OF FeSiMg FOLLOWED BY FLAME HARDENING PROCESS

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