Preparation and characterization of nanostructured dibasic calcium phosphate coating on magnesium alloy wire

Liu, Guanxiong; Wang, Jinyu; Bian, Keke; Zhu, Peizhi

doi:10.1016/j.matlet.2017.08.036

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…Liu et al [85] used a hydrothermal method to synthesize nanostructured dibasic calcium phosphate, which significantly improved the corrosion resistance of an AZ31B magnesium alloy. Jafari et al [86] has also reported improvement in the corrosion resistance of an AZ91D alloy due to a Ca–P coating.…”

Section: Protective Coatings To Improve the Corrosion Resistance Omentioning

confidence: 99%

Magnesium Implants: Prospects and Challenges

et al. 2019

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Owing to their suitable mechanical property and biocompatibility as well as the technological possibility of controlling their high corrosion rates, magnesium and its alloys have attracted significant attention as temporary bio-implants. Though the ability of magnesium to harmlessly biodegrade and its inherent biocompatibility make magnesium alloys a suitable choice for a temporary implant, their high corrosion rates limit their practical application, as the implants can potentially corrode away even before the healing process has completed. Different approaches, such as alloying, surface modification, and conversion coatings, have been explored to improve the corrosion resistance of various magnesium alloys. However, the corrosion behavior of magnesium implants with and without a surface modification has been generally investigated under in-vitro conditions, and studies under in-vivo conditions are limited, which has contributed to the lack of translation of magnesium implants in practical applications. This paper comprehensively reviews the prospects of magnesium alloy implants and the current challenges due to their rapid degradation in a physiological environment. This paper also provides a comprehensive review of the corrosion mitigation measures for these temporary implants.

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Section: Protective Coatings To Improve the Corrosion Resistance Omentioning

confidence: 99%

Magnesium Implants: Prospects and Challenges

et al. 2019

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“…The surface of magnesium alloys is similar to that of aluminum alloys; it also has a layer of magnesium oxide coating. However, the coating itself is loose, porous, soft and thin, and it is difficult to provide good corrosion protection [15][16][17][18][19]. This requires a layer of organic coating on the surface to prevent corrosion and improve its utilization.…”

Section: Introductionmentioning

confidence: 99%

Research on the Corrosion Resistance of an Epoxy Resin-Based Self-Healing Propylene Glycol-Loaded Ethyl Cellulose Microcapsule Coating

Zhang,

Liu,

et al. 2023

Coatings

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In this work, ethyl cellulose was used as a wall material, propanetriol as a core material, polyvinyl alcohol as a stabilizer and gelatin as an emulsifier. Self-healing microcapsules with a slow-release effect were prepared using the solvent evaporation method. Various analytical techniques, such as 3D confocal microscopy (LCSM), optical microscopy (OM), scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), energy dispersive spectroscopy (EDS), thermal weight loss analysis (TGA), laser particle size tester and electrochemical impedance polarization, are utilized. The morphology, distribution, particle size, corrosion resistance and self-healing ability of the prepared microcapsules and resin-based coatings were characterized and analyzed. The results show that the cross-sectional core–shell structure is clearly seen in the LCSM, showing a smooth, hollow, spherical shape. OM and laser particle size testers have shown that the size of the microcapsules decreases over time. Also, in OM, the microcapsules are uniformly distributed in the emulsion with a smooth and non-adherent surface. In SEM, the microcapsule particle size is about 150 μm, the shell wall thickness is about 18 μm, and the hollow structure of ruptured microcapsules is obvious. FT-IR and TGA confirmed the successful encapsulation of the formulated microcapsules. The results show that when the core-wall mass ratio is 1.2:1 and the amount of microcapsule is 10% of the coating amount, the prepared microcapsule has high thermal stability and certain wear resistance. By electrochemical and immersion experiments, it was found that a 3.5 wt % NaCl solution has the best impedance, the lowest corrosion current density, and good adhesion and tensile toughness. The results showed that glycerol was successfully released from the broken microcapsules and self-healed, forming an anticorrosive coating with excellent corrosion resistance and self-healing ability.

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“…In recent years, nanoparticles have attracted extensive attention in the fields of material chemistry, biopharmaceuticals and environmental science because of their remarkable advantages in biocompatibility and environmental friendliness [16][17][18][19]. Especially, nano-SiO 2 , nano-TiO 2 , nano-ZnO and nano-ZrO 2 have been applied to the corrosion and protection technology of alloy surfaces [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

A Nano-CeO2/Zn–Mn Composite Conversion Coatings on AZ91D Magnesium Alloy Surface of Corrosion Resistance Research

Zhang

Liu

et al. 2023

Coatings

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The modified nano-CeO2/Zn–Mn phosphate composite coating was deposited on AZ91D magnesium alloy by chemical conversion to enhance its densification and corrosion resistance. The growth mechanism and corrosion resistance of the composite coating is clarified by adding different concentrations of ZnO and a certain amount of nano-CeO2 into the phosphate-plating solution. XRD and EDS show that the composite membrane is mainly composed of MgO, Mg(OH)2, Mn3(PO4)2·5H20, Zn, Zn3(PO4)2·4H2O and CeO2. Among them, AZ91D magnesium alloy matrix presents dispersed granule, clustered and petal-shaped under the action of different concentrations of ZnO. Under the optimum ZnO concentration, after adding nano-CeO2, dense grains appear, and cracks and pores in the riverbed are obviously reduced. Compared with single-layer phosphate coating, the performance of composite coating is significantly improved. The results show that the obvious double-layer structure is observed by SEM, and the thickness of the coating is about 48 μm. The LCSM shows that the surface roughness of composite coating is moderate. EIS shows that when the fitting impedance is 8050.43 Ω and PH = 3, the dropping time of copper sulfate in the composite coating is 58.6 s, which is better than that in the single-layer coating. The Tafel polarization fitting curve shows that the corrosion current density of the composite coating is obviously lower than that of the single coating, the corrosion current density is decreased from 1.86 × 10−6 A/cm2 to 9.538 × 10−7 A/cm2, and the corrosion resistance is obviously improved.

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Preparation and characterization of nanostructured dibasic calcium phosphate coating on magnesium alloy wire

Cited by 10 publications

References 17 publications

Magnesium Implants: Prospects and Challenges

Magnesium Implants: Prospects and Challenges

Research on the Corrosion Resistance of an Epoxy Resin-Based Self-Healing Propylene Glycol-Loaded Ethyl Cellulose Microcapsule Coating

A Nano-CeO2/Zn–Mn Composite Conversion Coatings on AZ91D Magnesium Alloy Surface of Corrosion Resistance Research

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