Journal
CORROSION SCIENCE
Volume 102, Issue -, Pages 209-221Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.10.010
Keywords
Alloy; Magnesium; EIS; Passive films
Funding
- Special Prophase Program for Key Basic Research of the Ministry of Science and Technology of China (973 Program) [2014CB660809]
- National Natural Science Foundation of China [51422102, 81271715]
- Hong Kong Research Grants Council (RGC) General Research Funds (GRF) [112212]
- Hubei Provincial Natural Science Foundation [2013CFA018, 2014CFB551]
- City University of Hong Kong Strategic Research Grant (SRG) [7004188]
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A hydrid coating composed of dicalcium phosphate dihydrate (DCPD) and poly(lactic-co-glycolic acid) (PLGA) is prepared on AZ31 Mg alloy to control the corrosion resistance. The DCPD coating is deposited on the A231 substrate by electrochemical deposition and subsequently covered by the PLGA coating. Poten-tiodynamic and electrochemical impedance spectroscopy (EIS) tests conducted in simulated body fluid at 37 degrees C indicate that the corrosion resistance of the AZ31 is improved significantly by this hybrid coating. The deposition time influences the morphology and structure of the DCPD coating and consequently affects the corrosion resistance of both the DCPD and DCPD/PLGA coated samples. (C) 2015 Elsevier Ltd. All rights reserved.
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