Effect of surface roughness on the in vitro degradation behaviour of a biodegradable magnesium-based alloy

被引：54
|
作者：
Walter, R. [1 ]
Kannan, M. Bobby [1 ]
He, Y. [1 ]
Sandham, A. [2 ]
机构：
[1] James Cook Univ, Sch Engn & Phys Sci, Townsville, Qld 4811, Australia
[2] James Cook Univ, Sch Med & Dent, Cairns 4870, Australia
来源：
APPLIED SURFACE SCIENCE | 2013年 / 279卷
关键词：
Magnesium; Biomaterials; Surface roughness; Pitting corrosion; Passivity; CORROSION BEHAVIOR; VIVO CORROSION;
D O I：
10.1016/j.apsusc.2013.04.096
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this study, the in vitro degradation behaviour of AZ91 magnesium alloy with two different surface finishes was investigated using electrochemical impedance spectroscopy (EIS) in simulated body fluid (SBF). The polarisation resistance (R-p) of the rough surface alloy immersed in SBF for 3 h was similar to 30% lower as compared to that of the smooth surface alloy. After 12 h immersion in SBF, the R-p values for both the surface finishes decreased and were also similar. However, localised degradation occurred sooner, and to a noticeably higher severity in the rough surface alloy as compared to the smooth surface alloy. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：343 / 348
页数：6
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