A Zinc-Rich Coating Fabricated on a Magnesium Alloy by Oxide Reduction

Lu, Dongzhu; Huang, Yingjie; Duan, Jizhou

doi:10.3390/coatings9040278

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…In PVD, the coating material is first evaporated and subsequently condensed onto the substrate. The CVD process, on the other hand, is a chemical reaction that involves the deposition of solid material from a gas or vapour phase onto a heated metal surface [18]- [21]. The deposition of nanostructure coatings on the substrate is usually performed by gas phase deposition procedures.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance Enhancement for Low Carbon Steel by Gas Phase Coating

Djanali¹

2023

JMechE

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Corrosion Resistance Enhancement for low carbon steel is very important to extend its life service, the coating process is one of the methods which can using to achieve this, and it's the most important in surface treatments to improve the properties of metals and alloys surfaces such as corrosion resistance. In this work, low carbon steel was nitrided and coated with nano zinc using gas phase coating technical, to enhance the resistance of corrosion. The process included adding two layers. The first, a nitride layer, was added by precipitating nitrogen (N) gas, and the second, a zinc (Zn) layer, was added by precipitating Zn. The process of precipitating was carried out at different periods (5, 10, and 15 minutes). Scan electron microstructure (SEM), X-ray diffraction (XRD) and corrosion tests were carried out. The SEM and XRD results showed a new microstructure with the emergence of new phases (C3N4, Zn(N3)2, and γN). Also, the results of the corrosion test showed a significant improvement in corrosion resistance through a reduction in the corrosion rate (CR) and corrosion current density (icorr) which reached (1.598x10-3 mmpy) and (1.422x10-7 Amp/cm2) respectively, for coated samples, compared with 1.803×10-1 and 1.604x10-5, respectively, for the base metal. also found an appreciable increase in corrosion protection efficiency (CPE), which reached 99.11%.

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Section: Introductionmentioning

confidence: 99%

Corrosion Resistance Enhancement for Low Carbon Steel by Gas Phase Coating

Djanali¹

2023

JMechE

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“…It is reported that Mg atoms would cross the MgO film and be oxidized into new MgO at the interface of the MgO film and the air. − The surface alloying process could be simultaneous with oxidation of a magnesium alloy specimen. , Because Mg atoms could pass through the MgO film and be oxidized there as reported, , moreover, Mg atoms are active and reductive, it is reasonable to utilize Mg atoms to reduce oxides into metallic atoms in a diffusion alloying process. , …”

Section: Introductionmentioning

confidence: 99%

“…24,25 Because Mg atoms could pass through the MgO film and be oxidized there as reported, 21,22 moreover, Mg atoms are active and reductive, it is reasonable to utilize Mg atoms to reduce oxides into metallic atoms in a diffusion alloying process. 26,27 However, how do the as-reduced metallic atoms cross the MgO film and arrive at the magnesium alloy matrix is still an issue to be clarified. In this research, a diffusion source that contains ZnO powder and NH 4 Cl powder was utilized in the powder thermal diffusion alloying process on the magnesium alloy specimens.…”

Section: Introductionmentioning

confidence: 99%

Surface Alloying of a Magnesium Alloy with Zinc Oxide by Taking Advantage of the Permeability of the Magnesium Oxide Film

Huang

et al. 2019

J. Phys. Chem. C

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MgO films would naturally form on a magnesium alloy matrix in the air. They are loose and porous, and the corrosion resistance of magnesium alloys is limited. Here, we demonstrate that such a loose MgO film is not merely useless in the protection of magnesium alloys, as metallic atoms could penetrate the MgO film to form intermetallic coatings on the magnesium alloy matrix. In this work, utilizing a diffusion source which contains ZnO and NH 4 Cl, an intermetallic layer was obtained on a magnesium alloy. The morphology and chemical composition of the intermetallic layer and the MgO film were analyzed. Results show that Mg atoms in the magnesium alloy could be utilized as a reductive agent to reduce ZnO into Zn atoms, as reduced Zn atoms are able to penetrate the loose MgO film and form a Zn-rich intermetallic layer on the magnesium alloy matrix. The concept that the MgO film could be utilized as a potential path for the surface alloying of magnesium alloys would not only deepen the understanding of the nature of the MgO film but also illuminate the surface treatment industries which usually remove the MgO film before surface modification of magnesium alloys.

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Zinc chloride hydroxide - A recyclable diffusion source for fabrication of zinc rich coatings on magnesium alloys

Fan

et al. 2022

Journal of Cleaner Production

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A Zinc-Rich Coating Fabricated on a Magnesium Alloy by Oxide Reduction

Cited by 7 publications

References 25 publications

Corrosion Resistance Enhancement for Low Carbon Steel by Gas Phase Coating

Corrosion Resistance Enhancement for Low Carbon Steel by Gas Phase Coating

Surface Alloying of a Magnesium Alloy with Zinc Oxide by Taking Advantage of the Permeability of the Magnesium Oxide Film

Zinc chloride hydroxide - A recyclable diffusion source for fabrication of zinc rich coatings on magnesium alloys

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