J. Mater. Sci. Technol. ›› 2016, Vol. 32 ›› Issue (9): 874-882.DOI: 10.1016/j.jmst.2016.07.004
Special Issue: 2016腐蚀与防护专辑
• Orginal Article • Previous Articles Next Articles
Hou Lida1,Li Zhen1,2,Zhao Hong3,Pan Yu1,Pavlinich Sergey1,Liu Xiwei1,Li Xinlin1,Zheng Yufeng1,4,Li Li1,2,*()
Received:
2016-03-21
Accepted:
2016-05-24
Online:
2016-09-20
Published:
2016-11-02
Contact:
Li Li
Hou Lida,Li Zhen,Zhao Hong,Pan Yu,Pavlinich Sergey,Liu Xiwei,Li Xinlin,Zheng Yufeng,Li Li. Microstructure, Mechanical Properties, Corrosion Behavior and Biocompatibility of As-Extruded Biodegradable Mg-3Sn-1Zn-0.5Mn Alloy[J]. J. Mater. Sci. Technol., 2016, 32(9): 874-882.
Na+ | Cl- | HCO3- | K+ | Ca2+ | Mg2+ | HPO42- | SO42- | |
---|---|---|---|---|---|---|---|---|
SBF | 142.0 | 147.8 | 4.2 | 5.0 | 2.5 | 1.5 | 1.0 | 0.5 |
Blood plasma | 142.0 | 103.0 | 27.0 | 5.0 | 2.5 | 1.5 | 1.0 | 0.5 |
Table 1 Ion concentrations of SBF and human blood plasma (mmol/l)
Na+ | Cl- | HCO3- | K+ | Ca2+ | Mg2+ | HPO42- | SO42- | |
---|---|---|---|---|---|---|---|---|
SBF | 142.0 | 147.8 | 4.2 | 5.0 | 2.5 | 1.5 | 1.0 | 0.5 |
Blood plasma | 142.0 | 103.0 | 27.0 | 5.0 | 2.5 | 1.5 | 1.0 | 0.5 |
Fig. 1. Digital photos of implant surgery: (a) implant of Mg-3Sn-1Zn-0.5Mn alloy samples in the dorsal muscle; (b) implant of Mg-3Sn-1Zn-0.5Mn alloy samples in the femoral shaft; (c) the control sample prepared.
Status | Ecorr (V) | Icorr (μA/cm2) | Vcorr (mm/year) |
---|---|---|---|
As-cast | -1.78 | 25.12 | 5.66 |
As-extruded | -1.68 | 13.18 | 2.97 |
Table 2 Electrochemical parameters of as-cast and as-extruded Mg-3Sn-1Zn-0.5Mn alloy
Status | Ecorr (V) | Icorr (μA/cm2) | Vcorr (mm/year) |
---|---|---|---|
As-cast | -1.78 | 25.12 | 5.66 |
As-extruded | -1.68 | 13.18 | 2.97 |
Fig. 9. Surface morphology and EDS analysis of as-extruded Mg-3Sn-1Zn-0.5Mn alloy after immersion in SBF solution for different time: (a) and (b) soaking in 96?h, (c) and (d) soaking in 240?h; (e) and (f) soaking in 720?h.
Research groups | Level of Mg2+ concentration in serum (mmol/l) | |||||||
---|---|---|---|---|---|---|---|---|
Before implants | After implantation, time (d) | |||||||
1 | 10 | 15 | 30 | 45 | 90 | |||
Control (implants free) | Subcutaneous | 1.3?±?0.2 | 1.23?±?0.08 | 1.88?±?0.16 | 1.40?±?0.24 | 1.36?±?0.136 | 1.61?±?0.26 | 1.66?±?0.31 |
Orthopedics | 1.26?±?0.14 | 1.54?±?0.19 | 1.85?±?0.21 | 1.24?±?0.183 | 1.83?±?0.28 | 2.08?±?0.13 | 1.68?±?0.026 | |
As-extruded Mg alloy | Subcutaneous | 1.14?±?0.127 | 1.37?±?0.184 | 1.635?±?0.177 | 1.03?±?0.056 | 1.43?±?0.254 | 1.4?±?0.056 | 1.44?±?0.127 |
Orthopedics | 1.22?±?0.24 | 1.83?±?0.183 | 1.66?±?0.283 | 1.21?±?0.156 | 1.595?±?0.219 | 1.29?±?0.240 | 1.575?±?0.120 |
Table 3 Mg2+ concentrations in the serum of rabbit blood for as-extruded Mg-3Sn-1Zn-0.5Mn alloy samples before and after implantation
Research groups | Level of Mg2+ concentration in serum (mmol/l) | |||||||
---|---|---|---|---|---|---|---|---|
Before implants | After implantation, time (d) | |||||||
1 | 10 | 15 | 30 | 45 | 90 | |||
Control (implants free) | Subcutaneous | 1.3?±?0.2 | 1.23?±?0.08 | 1.88?±?0.16 | 1.40?±?0.24 | 1.36?±?0.136 | 1.61?±?0.26 | 1.66?±?0.31 |
Orthopedics | 1.26?±?0.14 | 1.54?±?0.19 | 1.85?±?0.21 | 1.24?±?0.183 | 1.83?±?0.28 | 2.08?±?0.13 | 1.68?±?0.026 | |
As-extruded Mg alloy | Subcutaneous | 1.14?±?0.127 | 1.37?±?0.184 | 1.635?±?0.177 | 1.03?±?0.056 | 1.43?±?0.254 | 1.4?±?0.056 | 1.44?±?0.127 |
Orthopedics | 1.22?±?0.24 | 1.83?±?0.183 | 1.66?±?0.283 | 1.21?±?0.156 | 1.595?±?0.219 | 1.29?±?0.240 | 1.575?±?0.120 |
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