Journal
THIN SOLID FILMS
Volume 562, Issue -, Pages 561-567Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2014.04.004
Keywords
Magnesium; Micro-arc oxidation; Polycaprolactone; Biodegradation; Corrosion resistance; Potentiodynamic polarization; Immersion test
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2011-0028709]
- Business for Academic-industrial Cooperative establishments [C0015562]
- National Research Foundation of Korea [2013R1A1A2063219] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The present study addresses the deposition of a duplex coating by microarc oxidation (MAO) treatment and polycaprolactone (PCL) coating to improve the corrosion resistance of Mg. A uniform PCL coating layer is formed by dip coating method on MAO treated Mg, and the corrosion resistance of MAO-PCL duplex coated Mg is evaluated by potentiodynamic polarization study and immersion test. The results reveal that the porous nature of MAO treated Mg fails to offer a better corrosion resistance in Hanks' balanced salt solution (HBSS). However, deposition of PCL coating (using 4 and 7 wt.% PCL) over MAO treated Mg significantly increased the corrosion resistance of Mg in HBSS for 7 days. The MAO-PCL duplex coating can be a good alternative method of protecting Mg from rapid corrosion for biodegradable implant applications. (C) 2014 Elsevier B.V. All rights reserved.
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