Journal
CORROSION SCIENCE
Volume 50, Issue 10, Pages 2906-2913Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2008.08.013
Keywords
Bioabsorbable magnesium; Calcium phosphate; Anodization; Autoclaving; Corrosion
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Calcium phosphate precipitated on pure magnesium from artificial plasma (modified Hanks' solution) was varied by anodization and autoclaving, aiming the control of corrosion rate of bioabsorbable magnesium. Rough and smooth anodized film was formed depending on anodizing voltage in 1 N NaOH. The amount of calcium phosphate precipitated on the porous film was 2-3 times larger than that on the smooth film. The Ca/P ratio on the porous film was slightly higher than that on the smooth film. The autoclaving did not significantly influence the morphology of anodized film; however, the precipitation of calcium phosphate was restricted. No significant local corrosion occurred after the immersion in modified Hanks' solution. It is demonstrated that the precipitation of calcium phosphate on magnesium can be controlled by anodization and autoclaving. (c) 2008 Elsevier Ltd. All rights reserved.
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