Corrosion behavior of porous ZrO^sub 2^ ceramic coating on AZ31B magnesium alloy

Magnesium alloys have been recognized as promising implant materials because of their biodegradability. However, rapid degradation due to electrochemical corrosion compromises their cytocompatibility and mechanical integrity. In the present work, a porous ZrO2 ceramic coating was constructed on the...

Full description

Saved in:
Bibliographic Details
Published in:Surface & coatings technology 2018-09, Vol.349, p.434
Main Authors: Gao, Yue'e, Zhao, Lianfu, Yao, Xiaohong, Hang, Ruiqiang, Zhang, Xiangyu, Tang, Bin
Format: Article
Language:English
Subjects:
Alloys
Biocompatibility
Biodegradability
Biomedical materials
Body fluids
Ceramic coatings
Ceramic glazes
Ceramics
Coating effects
Corrosion resistance
Corrosion resistant alloys
Degradation
Electrochemical corrosion
Electrode polarization
In vitro methods and tests
Magnesium base alloys
Open circuit voltage
Oxidation
Porous materials
Protective coatings
Substrates
Surgical implants
Zirconium dioxide
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Magnesium alloys have been recognized as promising implant materials because of their biodegradability. However, rapid degradation due to electrochemical corrosion compromises their cytocompatibility and mechanical integrity. In the present work, a porous ZrO2 ceramic coating was constructed on the surface of AZ31B magnesium alloy (ZrO2-AZ31B) to improve its corrosion resistance. The corrosion resistance of the coating was evaluated in simulated body fluid solution by electrochemical techniques. Higher open circuit potential, impedance and polarization resistance of ZrO2-AZ31B indicate it has a better corrosion resistance than that of AZ31B substrate in simulated body fluid solution. The results suggest that fabricating a ZrO2 ceramic coating on magnesium alloys is an effective method to decrease the degradation rate of magnesium alloys thereby better matching clinical requirements.
ISSN:0257-8972
1879-3347