Effect of ZnO pore-sealing layer on anti-corrosion and in-vitro bioactivity behavior of plasma electrolytic oxidized AZ91 magnesium alloy

Aidin Bordbar-Khiabani; Benyamin Yarmand; Masoud Mozafari

doi:10.1016/j.matlet.2019.126779

Effect of ZnO pore-sealing layer on anti-corrosion and in-vitro bioactivity behavior of plasma electrolytic oxidized AZ91 magnesium alloy

Aidin Bordbar-Khiabani
, Benyamin Yarmand^*
, Masoud Mozafari

^*Corresponding author for this work

Not published at VTT

Materials and Energy Research Center (MERC)
Iran University of Medical Sciences

Research output: Contribution to journal › Article › Scientific › peer-review

60 Citations (Scopus)

Abstract

A pore-sealing layer consists of ZnO nanoparticles was successfully prepared on plasma electrolytic oxidized AZ91 magnesium alloy using electrophoretic deposition method to improve its biomedical features. Investigating the anti-corrosion performance of duplex coating in simulated body fluid revealed that the sealing of surface inherent defects leads to a decrease of ~150 times in corrosion current density and an increase of ~50 times in impedance module, which indicates the difficulty of penetration pathways caused by layer thickness, surface porosity and roughness. Additionally, the ZnO nanoparticles embedded in duplex coating porosity considerably improved in-vitro bioactivity, resulting from their catalytic activity and high preferred nucleation sites for precipitating calcium phosphate compounds.

Original language	English
Article number	126779
Journal	Materials Letters
Volume	258
DOIs	https://doi.org/10.1016/j.matlet.2019.126779
Publication status	Published - 1 Jan 2020
MoE publication type	A1 Journal article-refereed

Funding

This research work has been supported with research grant (No.: 247383 ) by Materials and Energy Research Center ( MERC ), Karaj, Iran.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Keywords

AZ91 magnesium alloy
Biomaterials
Nanoparticles
Plasma electrolytic oxidation
Pore-sealing layer
ZnO

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10.1016/j.matlet.2019.126779

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title = "Effect of ZnO pore-sealing layer on anti-corrosion and in-vitro bioactivity behavior of plasma electrolytic oxidized AZ91 magnesium alloy",

abstract = "A pore-sealing layer consists of ZnO nanoparticles was successfully prepared on plasma electrolytic oxidized AZ91 magnesium alloy using electrophoretic deposition method to improve its biomedical features. Investigating the anti-corrosion performance of duplex coating in simulated body fluid revealed that the sealing of surface inherent defects leads to a decrease of \textasciitilde{}150 times in corrosion current density and an increase of \textasciitilde{}50 times in impedance module, which indicates the difficulty of penetration pathways caused by layer thickness, surface porosity and roughness. Additionally, the ZnO nanoparticles embedded in duplex coating porosity considerably improved in-vitro bioactivity, resulting from their catalytic activity and high preferred nucleation sites for precipitating calcium phosphate compounds.",

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AU - Bordbar-Khiabani, Aidin

AU - Yarmand, Benyamin

AU - Mozafari, Masoud

PY - 2020/1/1

Y1 - 2020/1/1

N2 - A pore-sealing layer consists of ZnO nanoparticles was successfully prepared on plasma electrolytic oxidized AZ91 magnesium alloy using electrophoretic deposition method to improve its biomedical features. Investigating the anti-corrosion performance of duplex coating in simulated body fluid revealed that the sealing of surface inherent defects leads to a decrease of ~150 times in corrosion current density and an increase of ~50 times in impedance module, which indicates the difficulty of penetration pathways caused by layer thickness, surface porosity and roughness. Additionally, the ZnO nanoparticles embedded in duplex coating porosity considerably improved in-vitro bioactivity, resulting from their catalytic activity and high preferred nucleation sites for precipitating calcium phosphate compounds.

AB - A pore-sealing layer consists of ZnO nanoparticles was successfully prepared on plasma electrolytic oxidized AZ91 magnesium alloy using electrophoretic deposition method to improve its biomedical features. Investigating the anti-corrosion performance of duplex coating in simulated body fluid revealed that the sealing of surface inherent defects leads to a decrease of ~150 times in corrosion current density and an increase of ~50 times in impedance module, which indicates the difficulty of penetration pathways caused by layer thickness, surface porosity and roughness. Additionally, the ZnO nanoparticles embedded in duplex coating porosity considerably improved in-vitro bioactivity, resulting from their catalytic activity and high preferred nucleation sites for precipitating calcium phosphate compounds.

KW - AZ91 magnesium alloy

KW - Biomaterials

KW - Nanoparticles

KW - Plasma electrolytic oxidation

KW - Pore-sealing layer

KW - ZnO

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DO - 10.1016/j.matlet.2019.126779

M3 - Article

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SN - 0167-577X

VL - 258

JO - Materials Letters

JF - Materials Letters

M1 - 126779

ER -

Effect of ZnO pore-sealing layer on anti-corrosion and in-vitro bioactivity behavior of plasma electrolytic oxidized AZ91 magnesium alloy

Abstract

Funding

UN SDGs

Keywords

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