Anticorrosion composite coatings on biodegradable Mg alloys: Electrochemical studies

Mg alloys are promising biomedical metal due to their natural degradability, good processability, and favorable mechanical properties. However, the poor corrosion resistance limits their further clinical applications. In this study, the combined strategies of surface chemical treatment and layer-by-layer self-assembly were used to prepare composite coatings on Mg alloys to improve the biocorrosion resistance. Specially, alkalized AZ91 Mg alloy generated chemical linkage with silane via Si–O–Mg covalent bond at the interface. Subsequently, Si–OH group from silane formed a crosslinked silane layer by Si–O–Si network. Further chemical assembly with graphene oxide (GO), lengthened the diffusion pathway of corrosive medium. The chemically assembled composite coatings could firmly bond to Mg alloy substrate, which persistently and effectively acted as compact barriers against corrosion propagation. Improved biocorrosion resistance of AZ91 Mg alloy with self-assembly composite coatings of silane/GO was subsequently confirmed by immersion tests. Besides, the Mg alloy exhibited good wear resistance due to outside layer of GO with a lubricant effect. Cell viability of higher than 75% had also been found for the alloy with self-assembly composite coatings, which showed good cytocompatibility.

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Influence of laser scanning speed on Cu-Zr-Al composite coatings on Mg alloys

International Journal of Minerals Metallurgy and Materials ◽

10.1007/s12613-013-0767-7 ◽

2013 ◽

Vol 20 (6) ◽

pp. 568-573 ◽

Cited By ~ 1

Author(s):

Ya-li Gao ◽

Meng Jie ◽

Hai-bo Zhang

Keyword(s):

Laser Scanning ◽

Composite Coatings ◽

Scanning Speed ◽

Mg Alloys ◽

Al Composite ◽

Laser Scanning Speed

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Plasma Electrolytic Oxidation/Cerium Conversion Composite Coatings for the Improved Corrosion Protection of AZ31 Mg Alloys

Journal of The Electrochemical Society ◽

10.1149/2.005303jes ◽

2012 ◽

Vol 160 (2) ◽

pp. C77-C82 ◽

Cited By ~ 16

Author(s):

Tae Seop Lim ◽

Hyun Sam Ryu ◽

Seong-Hyeon Hong

Keyword(s):

Corrosion Protection ◽

Plasma Electrolytic Oxidation ◽

Composite Coatings ◽

Mg Alloys ◽

Electrolytic Oxidation ◽

Plasma Electrolytic

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Corrosion and biocompatibility behaviours of microarc oxidation/phytic acid coated magnesium alloy clips for use in cholecystectomy in a rabbit model

RSC Advances ◽

10.1039/d0ra09275d ◽

2021 ◽

Vol 11 (34) ◽

pp. 20730-20736

Author(s):

Qiuxia Zheng ◽

Zongbin Sun ◽

Zhanhui Wang ◽

Tinghe Duan ◽

Kai Xu ◽

...

Keyword(s):

Magnesium Alloy ◽

Phytic Acid ◽

Cystic Duct ◽

Composite Coatings ◽

Rabbit Model ◽

Microarc Oxidation ◽

Cystic Artery ◽

Mg Alloys

Mg alloys with microarc oxidation/phytic acid composite coatings were tested as degradable ligation clips for ligating the cystic duct and cystic artery.

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Layer by layer assembled chitosan (TiO2)-heparin composite coatings on MAO-coated Mg alloys

Materials Letters ◽

10.1016/j.matlet.2020.128640 ◽

2020 ◽

Vol 281 ◽

pp. 128640

Author(s):

Yang Chen ◽

Jing Wang ◽

Jinhe Dou ◽

Huijun Yu ◽

Chuanzhong Chen

Keyword(s):

Composite Coatings ◽

Mg Alloys ◽

Layer By Layer

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Electrochemical studies on Zn/nano-CeO2 electrodeposited composite coatings

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2012.08.004 ◽

2012 ◽

Vol 208 ◽

pp. 64-72 ◽

Cited By ~ 45

Author(s):

S. Ranganatha ◽

T.V. Venkatesha ◽

K. Vathsala ◽

M.K. Punith kumar

Keyword(s):

Composite Coatings ◽

Electrochemical Studies

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Facile Synthesis of Excellent Anti-Corrosive Bi-Layer Structure Composite Coatings On Mg Alloys

Current Research in Bioorganic & Organic Chemistry ◽

10.29011/2639-4685.100021 ◽

2019 ◽

Vol 2 (1) ◽

Keyword(s):

Layer Structure ◽

Composite Coatings ◽

Mg Alloys ◽

Facile Synthesis

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Electron-Probe Quantitative Energy-Dispersive Analysis of Trace Magnesium Concentrations in Ag-Mg Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010016501x ◽

1996 ◽

Vol 54 ◽

pp. 510-511

Author(s):

R. B. Marinenko

Keyword(s):

Electron Probe ◽

Energy Dispersive Spectrometry ◽

Mg Alloys ◽

Energy Dispersive ◽

Energy Dispersive Analysis ◽

High Tc ◽

Alloy Wire ◽

High Tc Superconductor ◽

Eds Analysis ◽

Superior Mechanical Properties

Internally oxidized Ag-Mg alloys are used as sheaths for high Tc superconductor wires because of their superior mechanical properties. The preparation and characteristics of these materials have been reported. Performance of the sheaths depends on the concentration of the magnesium which generally is less than 0.5 wt. percent. The purpose of this work was to determine whether electron probe microanalysis using energy dispersive spectrometry (EDS) could be used to quantitate three different Ag-Mg alloys. Quantitative EDS analysis can be difficult because the AgL escape peak occurs at the same energy (1.25 keV) as the Mg Kα peak. An EDS spectrum of a Ag-Mg alloy wire is compared to a pure Ag spectrum in Fig. 1.

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