Formation mechanism of calcium phosphate coating on a plasma electrolytic oxidized magnesium and its corrosion behavior in simulated body fluids

Han, Jiaping; Tang, Shawei; San, Hongshan; Sun, Xinghui; Hu, Jin; Yu, Yucheng

doi:10.1016/j.jallcom.2019.152834

Cited by 23 publications

(7 citation statements)

References 57 publications

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“…It could be concluded that DCPD phase was easy to form at low temperatures (25 and 45 °C), while the high deposition temperature was conducive to the formation of HA phase. 35 The appearance of the diffraction peak on the (002) crystal plane means that the growth direction of HA crystal was perpendicular to the electrode surface during the electrodeposition, which not only corresponded to the SEM morphology but also was consistent with previous research results. 36 The diffraction peaks moved to the lower 2θ direction due to the substitution of Ca by Sr.…”

Section: Resultssupporting

confidence: 90%

“…With the increase of temperature, the obtained CaP gradually transformed from easily dissolved DCPD with a low ratio of Ca/P to thermodynamically stable HA with a high ratio of Ca/P. It could be concluded that DCPD phase was easy to form at low temperatures (25 and 45 °C), while the high deposition temperature was conducive to the formation of HA phase . The appearance of the diffraction peak on the (002) crystal plane means that the growth direction of HA crystal was perpendicular to the electrode surface during the electrodeposition, which not only corresponded to the SEM morphology but also was consistent with previous research results .…”

Section: Resultsmentioning

confidence: 77%

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Effect of Strontium-Substituted Calcium Phosphate Coatings Prepared by One-Step Electrodeposition at Different Temperatures on Corrosion Resistance and Biocompatibility of AZ31 Magnesium Alloys

Xu,

Li,

Zhang

et al. 2023

ACS Biomater. Sci. Eng.

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As potential degradable biomaterials, magnesium (Mg) alloys have development prospects in the field of orthopedic load-bearing, whereas the clinical application has encountered a bottleneck due to a series of problems caused by its rapid corrosion. In this study, strontium-substituted calcium phosphate (CaP) coatings with different structures were prepared on the surface of the Mg matrix by a simple one-step electrodeposition method at different temperatures, which enhanced the poor corrosion resistance of the Mg matrix. The coated sample prepared at 65 °C reduced the corrosion current density by 3 orders of magnitude and increased the impedance by nearly 2 orders of magnitude compared with bare Mg alloy, thanks to its dense fibrous structure similar to that of natural bones. Although the coating composition varies with different preparation temperatures, CaP, as an inorganic component similar to natural bone, has good cytocompatibility. Doping the right amount of strontium, which is a trace element in human bones, is beneficial to stimulate osteoblast differentiation, inhibit the activity of osteoclasts, and induce the formation of bone tissues. This provides a new option for modifying the Mg alloy with CaP coatings as a base.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 77%

Effect of Strontium-Substituted Calcium Phosphate Coatings Prepared by One-Step Electrodeposition at Different Temperatures on Corrosion Resistance and Biocompatibility of AZ31 Magnesium Alloys

Xu,

Li,

Zhang

et al. 2023

ACS Biomater. Sci. Eng.

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“…The most popular micro-arc coatings today are based on calcium phosphates (brushite, hydroxyapatite, tricalcium phosphate), calcium silicates (wollastonite, akermanite), etc. [36][37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Porous Biocoatings Based on Diatomite with Incorporated ZrO2 Particles for Biodegradable Magnesium Implants

Sedelnikova

Kashin

Уваркин

et al. 2023

JFB

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In the present work, the surface of a biodegradable Mg alloy was modified to create porous diatomite biocoatings using the method of micro-arc oxidation. The coatings were applied at process voltages in the range of 350–500 V. We have studied the influence of the addition of ZrO2 microparticles on the structure and properties of diatomite-based protective coatings for Mg implants. The structure and properties of the resulting coatings were examined using a number of research methods. It was found that the coatings have a porous structure and contain ZrO2 particles. The coatings were mostly characterized by pores less than 1 μm in size. However, as the voltage of the MAO process increases, the number of larger pores (5–10 μm in size) also increases. However, the porosity of the coatings varied insignificantly and amounted to 5 ± 1%. It has been revealed that the incorporation of ZrO2 particles substantially affects the properties of diatomite-based coatings. The adhesive strength of the coatings has increased by approximately 30%, and the corrosion resistance has increased by two orders of magnitude compared to the coatings without zirconia particles.

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“…The bonding strength of the top coat could be significantly enhanced by larger contact areas and interlock along rough interface between the MAO layer and top coat. Like the addition of particles in PEO electrolyte, various kinds of particles could be introduced into the solution for electrodeposition or electrophoretic deposition, which offers numerous possibilities to modulate the coating properties [84][85][86][87][88][89][90][91][92][93][94]. Kannan et al [84] modify the surface of pure magnesium by PEO processing followed with electrochemical deposition of calcium phosphate (CaP) and a double-layer coating is formed.…”

Section: Electrodeposition and Electrophoretic Depositionmentioning

confidence: 99%

“…The corrosion current density of the PEO-CaP coated sample is ~99% and ~97% lower than that of bare magnesium and the PEO-only coated sample. In another research, Han et al [85] claim that cathodic electrodeposition of the mixture of calcium hydrogen phosphate dihydrate (DCPD) and hydroxyapatite (HA) on the surface of PEO coated magnesium offers excellent corrosion resistance and biodegradability in SBF. Wang et al [86] build a micro-arc oxidation/graphene oxide/stearic acid (MAO/GO/SA) superhydrophobic composite coating on AZ91D magnesium alloy by combining the MAO, electrodeposition, and self-assembly techniques.…”

Section: Electrodeposition and Electrophoretic Depositionmentioning

confidence: 99%

Research Progress on the Wear and Corrosion Resistant Plasma Electrolytic Oxidation Composite Coatings on Magnesium and Its Alloys

Zhao

Wang

et al. 2023

Coatings

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Plasma electrolytic oxidation (PEO), as a cost effective and environmentally friendly technology, has been applied on magnesium and its alloys to improve wear and corrosion resistance. Additionally, combining with particles addition in the electrolyte and/or various post-treatments could diminish the intrinsic structural defects of the PEO coatings and provide multifunctionalities, including wear resistance, corrosion resistance, self-lubrication, and self-healing. This paper reviews recent progress on PEO composite coatings prepared by in situ incorporation of functional particles and/or post-treatments on magnesium and its alloys. The focus is given to the microstructural and functional changes of the PEO coatings, particularly on the wear and corrosion behaviors.

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Formation mechanism of calcium phosphate coating on a plasma electrolytic oxidized magnesium and its corrosion behavior in simulated body fluids

Cited by 23 publications

References 57 publications

Effect of Strontium-Substituted Calcium Phosphate Coatings Prepared by One-Step Electrodeposition at Different Temperatures on Corrosion Resistance and Biocompatibility of AZ31 Magnesium Alloys

Effect of Strontium-Substituted Calcium Phosphate Coatings Prepared by One-Step Electrodeposition at Different Temperatures on Corrosion Resistance and Biocompatibility of AZ31 Magnesium Alloys

Porous Biocoatings Based on Diatomite with Incorporated ZrO2 Particles for Biodegradable Magnesium Implants

Research Progress on the Wear and Corrosion Resistant Plasma Electrolytic Oxidation Composite Coatings on Magnesium and Its Alloys

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