کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1380 82 2011 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemical surface alteration of biodegradable magnesium exposed to corrosion media
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Chemical surface alteration of biodegradable magnesium exposed to corrosion media
چکیده انگلیسی

The understanding of corrosion processes of metal implants in the human body is a key problem in modern biomaterial science. Because of the complicated and adjustable in vivo environment, in vitro experiments require the analysis of various physiological corrosion media to elucidate the underlying mechanism of “biological” metal surface modification. In this paper magnesium samples were incubated under cell culture conditions (i.e. including CO2) in electrolyte solutions and cell growth media, with and without proteins. Chemical mapping by high-resolution electron-induced X-ray emission spectroscopy and infrared reflection microspectroscopy revealed a complex structure of the formed corrosion layer. The presence of CO2 in concentrations close to that in blood is significant for the chemistry of the oxidised layer. The presence of proteins leads to a less dense but thicker passivation layer which is still ion and water permeable, as osmolality and weight measurements indicate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Biomaterialia - Volume 7, Issue 6, June 2011, Pages 2704–2715
نویسندگان
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