On the role of surface roughness in the corrosion of pure magnesium in vitro
On the role of surface roughness in the corrosion of pure magnesium in vitro
复制标题
DOI：
10.1002/jbm.b.32697
复制
发表时间：
2012-07-01
影响因子：
3.4
通讯作者：
Woodfield, T. B. F.
中科院分区：
文献类型：
--
作者：
Nguyen, T. L.;Blanquet, A.;Woodfield, T. B. F.
镁生物材料表面粗糙度与其降解行为的关系一直是一个有争议的问题。本研究旨在阐明纯镁表面粗糙度与腐蚀速率之间的关系。纯镁样品的表面粗糙度值（Ra）为0.59，2.68，和9.12 μ m的铸造使用间接无固体形式的制造方法。采用析氢、质量损失、动电位极化和电化学阻抗谱等方法评价了其体外腐蚀行为。结果表明，表面粗糙度对纯镁的腐蚀速率有显著影响，随着粗糙度的增加，腐蚀速率加快。然而，没有观察到点蚀，表明表面粗糙度不影响Mg的点蚀电位。(c)2012年威利期刊公司J Biomed Mater Res Part B：Appl Biomater，2012.
The relationship between surface roughness and degradation behavior in magnesium (Mg) biomaterials is still a controversial issue. This study aims to clarify the relationship between surface roughness and corrosion rate of pure Mg. Pure Mg samples with surface roughness values (Ra) of 0.59, 2.68, and 9.12 mu m were cast using an indirect solid-free form fabrication method. The in vitro corrosion behavior was evaluated using hydrogen evolution, mass loss, potentiodynamic polarization, and electrochemical impedance spectroscopy. It was confirmed that surface roughness had a significant influence on the corrosion rate of pure Mg, with increasing roughness resulting in an accelerated corrosion rate. However, pitting corrosion was not observed, suggesting that surface roughness does not affect the pitting potential of Mg. (c) 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012.