Corrosion resistance of dicalcium phosphate dihydrate/poly(lactic-co-glycolic acid) hybrid coating on AZ31 magnesium alloy
Corrosion resistance of dicalcium phosphate dihydrate/poly(lactic-co-glycolic acid) hybrid coating on AZ31 magnesium alloy
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DOI：
10.1016/j.corsci.2015.10.010
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发表时间：
2016-01-01
影响因子：
8.3
通讯作者：
Chu, Paul K.
中科院分区：
文献类型：
--
作者：
Li, Xia;Weng, Zhengyang;Chu, Paul K.
在AZ 31镁合金表面制备了一种由二水磷酸氢钙（DCPD）和聚乳酸-羟基乙酸共聚物（PLGA）组成的复合涂层。通过电化学沉积将DCPD涂层沉积在A231基材上，随后用PLGA涂层覆盖。在37 ℃模拟体液中进行的动电位和电化学阻抗谱（EIS）测试表明，该复合涂层显著提高了AZ 31的耐腐蚀性能。沉积时间影响DCPD涂层的形态和结构，从而影响DCPD和DCPD/PLGA涂层样品的耐腐蚀性。(C)2015爱思唯尔有限公司版权所有。
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.