Paper Title:

Magnesium and Magnesium Alloys as Degradable Metallic Biomaterials

Periodical Advanced Materials Research (Volume 32)
Main Theme Frontiers in Materials Science and Technology
Edited by John Bell, Cheng Yan, Lin Ye and Liangchi Zhang
Pages 207-210
DOI 10.4028/www.scientific.net/AMR.32.207
Citation H. Wang et al., 2008, Advanced Materials Research, 32, 207
Online since February 2008
Authors H. Wang, Zhi Ming Shi, K. Yang
Keywords Biocorrosion Behaviour, Biodegradable Material, Biomaterial, Magnesium Alloy
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Drawbacks associated with permanent metallic implants lead to the search for degradable metallic biomaterials. Magnesium alloys have been highly considered as Mg has a high biocorrosion potential and is essential to bodies. In this study, corrosion behaviour of pure magnesium and magnesium alloy AZ31 in both static and dynamic physiological conditions (Hank’s solution) has been investigated. It is found that the materials degrade fast at beginning, then stabilize after 5 days of immersion. High purity in the materials reduces the corrosion rate while the dynamic condition accelerates the degradation process. In order to slow down the degradation process to meet the requirement for their bio-applications, an anodized coating is applied and is proved as effective in controlling the biodegradation rate.

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