Journal
CORROSION SCIENCE
Volume 75, Issue -, Pages 280-286Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2013.06.011
Keywords
Magnesium; Organic coatings; EIS; Polarization; Interfaces
Funding
- National Natural Science Foundation of China [20973134, 81271701]
- Key Basic Research Program of China [2011CB606204]
- Sichuan Youth Science & Technology Foundation for Distinguished Young Scholars [2012JQ0001]
- City University of Hong Kong Applied Research Grant (ARG) [9667066]
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Magnesium-based materials are promising in biodegradable implants, but the proper corrosion control is a challenge. Phytic acid has potential as a coating on Mg to control the degradation rate. An alkaline pretreatment process is implemented to form the hydroxyl group on the Mg surface and covalently immobilize phytic acid. The surface-immobilized phytic acid molecules chelate with Mg to form a dense and homogenous protective coating. The coated Mg exhibits a smaller corrosion current density and degradation rate as compared to bare Mg in the phosphate buffered saline. (c) 2013 Elsevier Ltd. All rights reserved.
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