Mg-Fe-LDH涂层改性AZ91D合金的耐蚀性、体外降解及成骨性能

doi:10.19976/j.cnki.43-1448/TF.2022031

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Abstract In order to meet the clinical requirements for corrosion resistance and osteogenesis of magnesium-based metal implants, the dense and uniform Mg-Fe-layered double hydroxide (Fe-LDH) coatings were prepared on the AZ91D Mg alloy matrix by hydrothermal method and the Fe-LDH/AZ91D samples were obtained. Electrochemical and hydrogen evolution experiments were performed to explore the effects of coatings on corrosion resistance and its in-vitro performance. Combining CCK-8 and in-vitro mineralization experiments, the biocompatibility and osteogenic properties of Fe-LDH/AZ91D were studied. The results show that the existence of the Fe-LDH coating establishes a barrier between AZ91D and the corrosive liquid and improves the corrosion resistance of the alloy. The corrosion inhibition efficiency of the modified magnesium alloy reaches 92.76%. After immersion in PBS for 14 days, the mass loss rate of AZ91D (40.59%) is almost 1.6 times that of Fe-LDH/AZ91D (25.16%), and the corrosion rate (4.14 mm/a) is about twice that of Fe-LDH/AZ91D (2.13 mm/a). The leaching solutions with different Fe-LDH/AZ91D volume fractions have good cell compatibility and can maintain the osteogenic activity of the cells, reaching the same level as the control group.

Key words： magnesium alloy surface modification layered bimetallic hydroxide corrosion protection osteogenesis differentiation

Received: 24 March 2022 Published: 15 November 2022

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	JING Shaohui
	ZHOU Jixiang
	ZHAO Dapeng
	WU Hong

Cite this article:

JING Shaohui,ZHOU Jixiang,ZHAO Dapeng, et al. Corrosion resistance, in-vitro degradation and osteogenic properties of AZ91D alloy modified by Mg-Fe-LDH coating[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(5): 509-518.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022031 OR http://pmbjb.csu.edu.cn/EN/Y2022/V27/I5/509

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