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首页> 外文期刊>Journal of coatings technology and research >Electrodeposition of hydroxyapatite coating on magnesium for biomedical applications
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Electrodeposition of hydroxyapatite coating on magnesium for biomedical applications

机译：用于生物医学应用的镁上羟基磷灰石涂层的电沉积

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摘要

The effectiveness of hydroxyapatite (HA) coating prepared by electrodeposition technique in improving the corrosion resistance of commercially pure magnesium (CP-Mg) in simulated body fluid (SBF) is addressed. The coating formed in as-deposited condition is identified as dicalcium phosphate dehydrate (DCPD) (Brushite), which is converted to HA after immersion in 1 M NaOH at 80°C for 2 h. The XRD patterns and FTIR spectra confirm the formation of DCPD and HA. During electrodeposition, the H_2PO_4~- ion is reduced and the reaction between Ca~(2+) ions and the reduced phosphate ions leads to the formation of DCPD, which is converted to HA following treatment in NaOH. The deposition of HA coating enables a threefold increase in the corrosion resistance of CP-Mg. The ability to offer a significant improvement in corrosion resistance coupled with the bioactive characteristics of the HA coating establish that electrodeposition of HA is a viable approach to engineer the surface of CP-Mg in the development of Mg-based degradable implant materials.
机译：提出了通过电沉积技术制备的羟基磷灰石（HA）涂层在改善商业纯镁（CP-Mg）在模拟体液（SBF）中的耐腐蚀性方面的有效性。沉积状态下形成的涂层被鉴定为磷酸氢钙二水合物（DCPD）（Brushite），将其在80°C的1 M NaOH中浸泡2小时后转化为HA。 XRD图谱和FTIR光谱证实了DCPD和HA的形成。在电沉积过程中，H_2PO_4_-离子被还原，Ca〜（2+）离子与还原的磷酸根离子之间的反应导致DCPD的形成，在NaOH中处理后将其转化为HA。 HA涂层的沉积使CP-Mg的耐腐蚀性提高了三倍。具有显着改善的耐腐蚀性以及HA涂层的生物活性特征的能力确立了HA的电沉积是在开发基于Mg的可降解植入物材料时对CP-Mg表面进行工程设计的可行方法。

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