Deposition and evaluation of duplex hydroxyapatite and plasma electrolytic oxidation coatings on magnesium

Release time:2021-07-12

Impact Factor:4.158

DOI number:10.1016/j.surfcoat.2015.01.030

Journal:Surface and Coatings Technology

Abstract:Multifunctional hydroxyapatite (HA)-magnesia coatings were formed on Mg by plasma electrolytic oxidation (PEO) followed by cathodic electrodeposition. The coating corrosion performance was evaluated in-vitro by potentiodynamic polarisation and electrochemical impedance spectrosdopy. Exposure to the physiological environment increased Ca/P ratio of the single PEO coating and decreased. it for the duplex HA-PEO coating. Corrosion resistance of Mg was improved by the PEO coating and further enhanced by the HA layer. Corrosion pits were observed after the tests on both coatings. The proposed corrosion mechanism includes electrolyte penetration, coating chemical dissolution and anodic dissolution of Mg.

Co-author:Allan Matthews

First Author:Yonghao Gao

Indexed by:Journal paper

Correspondence Author:Aleksey Yerokhin

Document Code:WOS:000353747000021

Discipline:Engineering

First-Level Discipline:Materials Science and Engineering

Document Type:J

Volume:269

Page Number:170-182

ISSN No.:0257-8972

Translation or Not:no

Date of Publication:2015-05-15

Included Journals:SCI、EI