Relatively uniform and accelerated degradation of pure iron coated with micro-patterned Au disc arrays

被引:31
作者
Cheng, J. [1 ]
Huang, T. [2 ]
Zheng, Y. F. [1 ,2 ]
机构
[1] Peking Univ, Acad Adv Interdisciplinary Studies, Ctr Biomed Mat & Tissue Engn, Beijing 100871, Peoples R China
[2] Peking Univ, Coll Engn, Dept Mat Sci & Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China
来源
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS | 2015年 / 48卷
基金
中国国家自然科学基金;
关键词
Micro-patterned Au coating; Pure iron; Biodegradation; IMMERSION ION-IMPLANTATION; IN-VITRO; STENTS; BIOMATERIAL; ALLOYS; CELLS; BIOCOMPATIBILITY; NANOPARTICLES; DEPOSITION; SURFACES;
D O I
10.1016/j.msec.2014.12.053
中图分类号
TB3 [工程材料学]; R318.08 [生物材料学];
学科分类号
0805 ; 080501 ; 080502 ;
摘要
Pure iron has been proven to be a potential biodegradable metal, but its degradation rate was too slow. To accelerate its biodegradation, micro-patterned Au disc films were deposited on the surface of pure iron by vacuum sputtering. The influence of Au disc films on the degradation of pure iron matrix in vitro was investigated in the present study. Electrochemical measurement results indicated that the corrosion current density of pure iron coated with micro-patterned Au disc films in Hank's solution was 4 times larger than that of the uncoated one, while the difference between the influences of micro-patterned Au discs with different diameters on the corrosion rate of pure iron was insignificant. Immersion test indicated that the corrosion depth for pure iron coated with Au disc films was about three times as that of bare pure iron. Both electrochemical test and immersion test revealed that the corrosion of pure iron matrix coated with Au disc array became more uniform. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:679 / 687
页数:9
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