Corrosion behaviour of AZ31 magnesium alloy with different grain sizes in simulated biological fluids

被引：411

作者：

Alvarez-Lopez, M. ^{[1
]}

Dolores Pereda, Maria ^{[2
,3
]}

del Valle, J. A. ^{[1
]}

Fernandez-Lorenzo, M. ^{[2
,3
]}

Garcia-Alonso, M. C. ^{[1
]}

Ruano, O. A. ^{[1
]}

Escudero, M. L. ^{[1
]}

机构：

[1] CSIC, CENIM, Madrid 28040, Spain

[2] Univ Nacl La Plata CONICET, Fac Ciencias Exactas, INIFTA, RA-1900 La Plata, Buenos Aires, Argentina

[3] Univ Nacl La Plata, Fac Ingn, RA-1900 La Plata, Buenos Aires, Argentina

来源：

ACTA BIOMATERIALIA | 2010年 / 6卷 / 05期

关键词：

AZ31 Mg alloy; Grain size; Biomaterial; Corrosion; Electrochemical techniques; IN-VIVO CORROSION; IMPEDANCE SPECTROSCOPY; HANKS SOLUTION; MGAL ALLOYS; AZ91D; CHLORIDE; BIOCOMPATIBILITY; MORPHOLOGY; SURFACE; STENTS;

D O I：

10.1016/j.actbio.2009.04.041

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The corrosion behaviour of AZ31 magnesium alloy with different grain sizes immersed in simulated body fluids was compared in chloride solution (8 g l(-1)) and in phosphate-buffer solution (PBS). The influence of immersion time was also analyzed. Electrochemical techniques such as open circuit potential, polarization curves, transient currents and electrochemical impedance spectroscopy, complemented with scanning electron microscopy and energy dispersive spectroscopy, were used. Immediately after the immersion in the corrosive media the corrosion resistance was similar for both grain sizes of the AZ31 alloy and higher in NaCl solutions than in PBS. However, this corrosion behaviour was reversed after longer periods of immersion due to the stabilizing of the corrosion products of MgO by P-containing compounds. These P-compounds contribute to a higher level of protection by hindering the aggressive action of chloride ions. The best corrosion behaviour of the AZ31 alloy was obtained for the finest grain alloy associated with the highest transfer resistance value, after long periods of immersion in PBS. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1763 / 1771

页数：9

共 36 条

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