Corrosion resistance and bioactivity enhancement of MAO coated Mg alloy depending on the time of hydrothermal treatment in Ca-EDTA solution

Abstract In this study, a two-step surface treatment was developed to restrain the rapid primary degradation of a biodegradable Mg alloy and to improve their biocompatibility. Micro arc oxidation (MAO) coating was performed in alkaline electrolytes such as 1.0 M NaOH with 0.1 M glycerol and 0.1 M Na...

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Autores principales:	Seo-Young Kim, Yu-Kyoung Kim, Moon-Hee Ryu, Tae-Sung Bae, Min-Ho Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1e6c39df85f346268d30ecf2a994f597
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spelling	oai:doaj.org-article:1e6c39df85f346268d30ecf2a994f5972021-12-02T16:08:09ZCorrosion resistance and bioactivity enhancement of MAO coated Mg alloy depending on the time of hydrothermal treatment in Ca-EDTA solution10.1038/s41598-017-08242-02045-2322https://doaj.org/article/1e6c39df85f346268d30ecf2a994f5972017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08242-0https://doaj.org/toc/2045-2322Abstract In this study, a two-step surface treatment was developed to restrain the rapid primary degradation of a biodegradable Mg alloy and to improve their biocompatibility. Micro arc oxidation (MAO) coating was performed in alkaline electrolytes such as 1.0 M NaOH with 0.1 M glycerol and 0.1 M Na3PO4. Hydrothermal treatment was performed in 0.1 M Ca-EDTA (C10H12CaN2Na2O8) and 0.5 M NaOH solution at 90 °C for different times (6, 12, 24, and 48 h). The film morphology and chemical properties were evaluated by XRD and FE-SEM. The electrochemical and corrosion behaviors were examined in the simulated body fluid, and cytotoxicity was assessed using MC3T3-E1 cells. After MAO coating, an oxide layer containing $${\bf{P}}{{\bf{O}}}_{4}^{3-}$$ P O 4 3 − formed on the surface. During the hydrothermal treatment in Ca-EDTA solution, calcium phosphate and Mg(OH)2 were produced via a reaction between $${\bf{P}}{{\bf{O}}}_{4}^{3-}$$ P O 4 3 − on the surface and Ca2+ in solution. The layer with ceramics and oxides was grown on the surface with increasing hydrothermal treatment time, and improved the surface corrosion resistance. The 24 h hydrothermal-treated group showed the lowest immersion corrosion rate and high cell viability. Therefore, this treatment was the most favorable surface modification for improving the initial corrosion resistance and bioactivity of the biodegradable Mg alloy.Seo-Young KimYu-Kyoung KimMoon-Hee RyuTae-Sung BaeMin-Ho LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Seo-Young Kim Yu-Kyoung Kim Moon-Hee Ryu Tae-Sung Bae Min-Ho Lee Corrosion resistance and bioactivity enhancement of MAO coated Mg alloy depending on the time of hydrothermal treatment in Ca-EDTA solution
description	Abstract In this study, a two-step surface treatment was developed to restrain the rapid primary degradation of a biodegradable Mg alloy and to improve their biocompatibility. Micro arc oxidation (MAO) coating was performed in alkaline electrolytes such as 1.0 M NaOH with 0.1 M glycerol and 0.1 M Na3PO4. Hydrothermal treatment was performed in 0.1 M Ca-EDTA (C10H12CaN2Na2O8) and 0.5 M NaOH solution at 90 °C for different times (6, 12, 24, and 48 h). The film morphology and chemical properties were evaluated by XRD and FE-SEM. The electrochemical and corrosion behaviors were examined in the simulated body fluid, and cytotoxicity was assessed using MC3T3-E1 cells. After MAO coating, an oxide layer containing $${\bf{P}}{{\bf{O}}}_{4}^{3-}$$ P O 4 3 − formed on the surface. During the hydrothermal treatment in Ca-EDTA solution, calcium phosphate and Mg(OH)2 were produced via a reaction between $${\bf{P}}{{\bf{O}}}_{4}^{3-}$$ P O 4 3 − on the surface and Ca2+ in solution. The layer with ceramics and oxides was grown on the surface with increasing hydrothermal treatment time, and improved the surface corrosion resistance. The 24 h hydrothermal-treated group showed the lowest immersion corrosion rate and high cell viability. Therefore, this treatment was the most favorable surface modification for improving the initial corrosion resistance and bioactivity of the biodegradable Mg alloy.
format	article
author	Seo-Young Kim Yu-Kyoung Kim Moon-Hee Ryu Tae-Sung Bae Min-Ho Lee
author_facet	Seo-Young Kim Yu-Kyoung Kim Moon-Hee Ryu Tae-Sung Bae Min-Ho Lee
author_sort	Seo-Young Kim
title	Corrosion resistance and bioactivity enhancement of MAO coated Mg alloy depending on the time of hydrothermal treatment in Ca-EDTA solution
title_short	Corrosion resistance and bioactivity enhancement of MAO coated Mg alloy depending on the time of hydrothermal treatment in Ca-EDTA solution
title_full	Corrosion resistance and bioactivity enhancement of MAO coated Mg alloy depending on the time of hydrothermal treatment in Ca-EDTA solution
title_fullStr	Corrosion resistance and bioactivity enhancement of MAO coated Mg alloy depending on the time of hydrothermal treatment in Ca-EDTA solution
title_full_unstemmed	Corrosion resistance and bioactivity enhancement of MAO coated Mg alloy depending on the time of hydrothermal treatment in Ca-EDTA solution
title_sort	corrosion resistance and bioactivity enhancement of mao coated mg alloy depending on the time of hydrothermal treatment in ca-edta solution
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/1e6c39df85f346268d30ecf2a994f597
work_keys_str_mv	AT seoyoungkim corrosionresistanceandbioactivityenhancementofmaocoatedmgalloydependingonthetimeofhydrothermaltreatmentincaedtasolution AT yukyoungkim corrosionresistanceandbioactivityenhancementofmaocoatedmgalloydependingonthetimeofhydrothermaltreatmentincaedtasolution AT moonheeryu corrosionresistanceandbioactivityenhancementofmaocoatedmgalloydependingonthetimeofhydrothermaltreatmentincaedtasolution AT taesungbae corrosionresistanceandbioactivityenhancementofmaocoatedmgalloydependingonthetimeofhydrothermaltreatmentincaedtasolution AT minholee corrosionresistanceandbioactivityenhancementofmaocoatedmgalloydependingonthetimeofhydrothermaltreatmentincaedtasolution
_version_	1718384580821516288

Corrosion resistance and bioactivity enhancement of MAO coated Mg alloy depending on the time of hydrothermal treatment in Ca-EDTA solution

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