The effect of addition of K2ZrF6 on the structures and properties of AZ31 magnesium alloy MAO coating

被引：10
作者：
Chen, X. W. [1 ,2 ]
Zhang, M. [1 ,2 ]
Zhang, D. F. [2 ]
Cai, L. P. [2 ]
Song, H. [2 ]
Zeng, D. Z. [1 ]
机构：
[1] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploitat, Chengdu 610500, Sichuan, Peoples R China
[2] Southwest Petr Univ, Sch New Energy & Mat, Chengdu 610500, Sichuan, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 966卷
基金：
中国国家自然科学基金;
关键词：
Magnesium alloy; K2ZrF6; Micro-arc oxidation; Corrosion resistance; Blood compatibility; BIODEGRADABLE MAGNESIUM; CORROSION-RESISTANCE; BIOCOMPATIBILITY; DEGRADATION;
D O I：
10.1016/j.jallcom.2023.171474
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
It is a challenge to improve the corrosion rate and blood compatibility of biomedical magnesium alloy implants in human body. Scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) were used to study the Properties of K2ZrF6 modified AZ31 magnesium alloy composite coating. The corrosion behavior of the sample in simulated body fluid (SBF) was evaluated by hydrogen evolution corrosion, potentiodynamic polarization cur ve and electrochemical impedance spectroscopy. The results show that the corrosion resistance of magnesium alloy is significantly improved by composite coating. The wettability test shows that K2ZrF6 greatly improves the biocompatibility of MAO coating on magnesium alloy. The hemolysis test shows that the composite coating makes magnesium alloy have low hemolysis rate. The increase of PH value and magnesium ion concentration in solution caused by corrosion of magnesium alloy can be adjusted by adding K2ZrF6. The corrosion resistance mechanism of MAO coating on K2ZrF6 modified magnesium alloy was discussed. In this experiment, the optimum amount of K2ZrF6 is 4 g/L.
引用
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页数：10
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