Effects of annealing heat treatment on the corrosion resistance of Zn/Mg/Zn multilayer coatings

Bae, KiTae; La, Joung-Hyun; Lee, Ingyu; Lee, Sang-Yul; Nam, KyungHoon

doi:10.1007/s12540-017-6478-2

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…According to the potentiodynamic polarization curves, the observed E corr of Zn in 2 M NaCl without EDTA (Figure 2) corresponds to the potential of neat Zn, which is activated by the cathodic polarization. Further evidence for the cathodic activation of Zn can be found in the previous studies which report the polarization curves of Zn electrodes in NaCl solutions [53–55] . If the initial scan potential for the potentiodynamic polarization is more cathodic than the water reduction potential (<−1.37 V Ag/AgCl ), the resulting E corr is also more negative than the commonly reported open circuit potentials (<−1.05 V Ag/AgCl ), which is in good agreement with the present work.…”

Section: Resultssupporting

confidence: 93%

“…Further evidence for the cathodic activation of Zn can be found in the previous studies which report the polarization curves of Zn electrodes in NaCl solutions. [53][54][55] If the initial scan potential for the potentiodynamic polarization is more cathodic than the water reduction potential (< À 1.37 V Ag/AgCl ), the resulting E corr is also more negative than the commonly reported open circuit potentials (< À 1.05 V Ag/AgCl ), which is in good agreement with the present work. Contrariwise, the corrosion potential of Zn near À 1.05 V Ag/AgCl is usually obtained when the initial scans start at more positive values than the water reduction potential.…”

Section: Open Circuit Potential and Potentiodynamic Polarizationsupporting

confidence: 91%

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Improved Electrochemical Performance of Zinc Anodes by EDTA in Near‐Neutral Zinc−Air Batteries

Guerrero

Durmus

Dzięcioł

et al. 2021

Batteries & Supercaps

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The influence of ethylenediaminetetraacetic acid (EDTA) electrolyte additive on the performance of ZnÀ air batteries with nearneutral chloride-based electrolytes was examined for primary and secondary batteries. The electrochemical measurements indicated that Zn is not completely active in neat 2 M NaCl, but still could be discharged up to 1 mA cm À 2 around À 1.0 V Ag/AgCl . The characterization of the Zn surfaces revealed the existence of a passive film consisting of Simonkolleite, Zn(OH) 2 , and/or ZnO. The EDTA additive enhanced the discharge voltages by 200 mV to À 1.2 V Ag/AgCl indicating an active Zn surface. The effect of EDTA is explained by its chelation abilities with Zn 2 + before formation of hydroxide or oxide species. The ZnÀ air cells with EDTA were operated up to 930 h with specific energies up to 840 Wh kg Zn À 1 . The cells could also be cycled up to 70 cycles while providing enhanced discharge voltages at 1.15 V over 50 cycles. The positive effect of EDTA is dependent on the amount of free EDTA molecules. Nevertheless, the ZnÀ air cells showed better performance in terms of higher discharge voltage, discharge energies, and lower overpotentials in presence of EDTA.

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Section: Resultssupporting

confidence: 93%

Section: Open Circuit Potential and Potentiodynamic Polarizationsupporting

confidence: 91%

Improved Electrochemical Performance of Zinc Anodes by EDTA in Near‐Neutral Zinc−Air Batteries

Guerrero

Durmus

Dzięcioł

et al. 2021

Batteries & Supercaps

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“…Two different positions are pointed on the surface and the experiment was performed. Two distinguish peaks such as (110) and (200) was identified as Fe peaks 10,11,14 and the findings are confirmed with the JCPDS file no. (85-1317, 65-5973 and 35-0821).…”

Section: Resultssupporting

confidence: 76%

Effect of deposition thickness on microstructure and thermal behaviour of ZnO-Mg coated AISI 4140 for automotive applications

Ramkumar¹,

Selvakumar²,

Mohanraj

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this research article, the detailed morphology characterization and thermal behaviour of AISI 4140 steel coated with ZnO-Mg were studied. Coating thickness of approximately ≈ 30, 60 and 90 µm were taken. The surface morphology of the coated samples was studied using Optical Microscope (OM) and Scanning Electron Microscope (SEM). Phases present in the coated samples were confirmed using X-Ray Diffraction Technique (XRD) and Raman Spectroscopy. Thermal properties of the coated samples such as thermal conductivity and thermal diffusivity were determined. In addition, specific heat of the coated samples was also identified. The samples with coating thickness of 30 µm exhibit enhanced thermal properties compared to other coated samples. The results reveal that ZnO-Mg coating can significantly improve the thermal properties of AISI 4140 steel, which can be a fair candidate material for automotive applications.

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“…To improve the service life of bushings and sleeve pipes as well as to reduce economic losses, many methods had been chosen to improve their wear resistance and anti-corrosion, such as selecting specialty materials, using a surface hardening process or other methods. The choice of materials usually includes high nickel (Ni)-chromium (Cr) stainless steel, Ni-based alloys or cobalt (Co)-based alloys for creation, but it obviously leads to higher manufacturing costs [10][11][12][13]. The method of material surface infiltration and centrifugal casting for the preparation of the bushings and sleeve pipes with a composite structure is a way to reduce the production cost and maintain excellent performance, but the manufacturing process is also very complex.…”

Section: Substrate Fabrication Of Bushings and Sleeve Pipesmentioning

confidence: 99%

Thermal-Sprayed Coatings on Bushing and Sleeve-Pipe Surfaces in Continuous Galvanizing Sinking Roller Production Line Applications

Zhang

et al. 2017

Coatings

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This paper describes thermal spray techniques for making hard coatings on bushing and sleeve component surfaces. Specifically, plasma-arc welding was used to produce 5-mm thick Co-Cr alloy welding overlays on the bushing, while a high-velocity oxy-fuel spraying technique and laser re-melting technique were used to produce thinner coatings of Co-Cr-Ni+WC of about 1 mm thickness on the sleeve-pipe counterparts. The surface-treated components were then submerged in liquid zinc to study the corrosive behaviour of the surface coating and substrate. Both the scanning electron microscope and energy dispersive spectrometer analyses were used to study the microstructure and phase composition of both coatings and substrates prior to and after corrosion experiments. The results show that the microstructure of the bushing consists of γ-cobalt solid solution as well as the eutectic structure of γ-cobalt and carbides, which have good corrosive resistance against molten zinc. Meanwhile, the microstructure of the sleeve pipe consists of a Co-Cr solid solution with various forms of carbides, which displays the combined properties of toughness with good corrosive resistance to molten zinc.

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Effects of annealing heat treatment on the corrosion resistance of Zn/Mg/Zn multilayer coatings

Cited by 13 publications

References 35 publications

Improved Electrochemical Performance of Zinc Anodes by EDTA in Near‐Neutral Zinc−Air Batteries

Improved Electrochemical Performance of Zinc Anodes by EDTA in Near‐Neutral Zinc−Air Batteries

Effect of deposition thickness on microstructure and thermal behaviour of ZnO-Mg coated AISI 4140 for automotive applications

Thermal-Sprayed Coatings on Bushing and Sleeve-Pipe Surfaces in Continuous Galvanizing Sinking Roller Production Line Applications

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