Hydroxyapatite (HA) Modified Nanocoating Enhancement on AZ31 Mg Alloy by Combined Surface Mechanical Attrition Treatment and Electrochemical Deposition Approach

Huayun Du; Yanli An; Xilu Zhang; Yinghui Wei; Lifeng Hou; Baosheng Liu; Hu Liu; Jiaoxia Zhang; Ning Wang; Ahmad Umar; Zhanhu Guo

doi:10.1166/jnn.2019.15746

Hydroxyapatite (HA) Modified Nanocoating Enhancement on AZ31 Mg Alloy by Combined Surface Mechanical Attrition Treatment and Electrochemical Deposition Approach

J Nanosci Nanotechnol. 2019 Feb 1;19(2):810-818. doi: 10.1166/jnn.2019.15746.

Authors

Huayun Du¹, Yanli An², Xilu Zhang¹, Yinghui Wei¹, Lifeng Hou¹, Baosheng Liu¹, Hu Liu³, Jiaoxia Zhang³, Ning Wang⁴, Ahmad Umar⁵, Zhanhu Guo³

Affiliations

¹ College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China.
² College of Basic Medical, Shanxi Medical University, Taiyuan, Shanxi 030001, China.
³ Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA.
⁴ State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, P. R. China.
⁵ Department of Chemistry, Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran 11001, Kingdom of Saudi Arabia.

PMID: 30360157
DOI: 10.1166/jnn.2019.15746

Abstract

Hydroxyapatite (HA) nanocoating was electrodeposited on the surface mechanical attrition treated (SMATed) AZ31 magnesium alloy. Phases, morphologies and the adhesion of coating were characterized by X-ray diffraction, scanning electron microscopy (SEM) and 3D optical profiler. The corrosion resistance of the HA coating was tested by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed that the HA coating on SMATed sample had a better crystallization than that on original one. The thickness of HA coating increased from 25 to 40 μm. The bonding strength between HA coating and SMATed substrate was higher than that between the coating and untreated counterpart. Potentiodynamic polarization and EIS demonstrated that the corrosion current density of HA coating on SMATed substrate decreased by 30.84% than that on original. The corrosion potential shifted 80.3 mV to the positive direction. The corrosion resistance of coatings on SMATed sample was significantly enhanced. The immersion experiments showed that the HA coatings on SMATed sample exhibited a better biological activity.

Publication types

Research Support, Non-U.S. Gov't