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[目的]通过表面改性技术来改善AZ31B镁合金的耐蚀性及抗菌性。[方法]以溶剂热法在硅烷化AZ31B镁合金表面制备了一种含锌离子的沸石咪唑酯骨架材料涂层ZIF-90，随后通过植酸(PA)化学转化制得ZIF-90/PA复合涂层。利用X射线衍射(XRD)、扫描电子显微镜(SEM)和傅里叶变换红外光谱(FTIR)分析了涂层的表面形貌和组织结构，通过电化学测量及析氢实验考察了涂层镁合金在模拟体液(SBF)中的耐腐蚀性能。采用金黄色葡萄球菌测试了涂层镁合金的抗菌性能。[结果]成功在AZ31B镁合金表面合成了ZIF-90/PA复合涂层。相比于PA涂层镁合金，ZIF-90/PA复合涂层镁合金在SBF中的容抗弧半径明显增大，腐蚀电流降低了1个数量级，腐蚀电位正移了0.217 V，析氢量明显降低，抗菌率由25.3%提高到98.2%。[结论]相较于单一的PA涂层，得益于较厚的涂层结构、致密的表面转化膜、良好的结合力，以及锌离子的抗菌作用，ZIF-90/PA复合涂层拥有更好的耐蚀性及抗菌性。
Abstract：[Objective] To improve the corrosion resistance and antibacterial properties of AZ31B magnesium alloy through surface modification technology. [Method] A zinc-ion-containing zeolitic imidazolate framework coating(ZIF-90) was prepared on the surface of silanized AZ31B magnesium alloy via a solvothermal method, followed by the chemical conversion with phytic acid(PA) to form a ZIF-90/PA composite coating. The surface morphology and microstructure of the coatings were analyzed by X-ray diffraction(XRD), scanning electron microscopy(SEM), and Fourier-transform infrared spectroscopy(FTIR). The corrosion resistance of the coated magnesium alloy in simulated body fluid(SBF) was evaluated via electrochemical measurements and hydrogen evolution experiments. The antibacterial performance was examined using Staphylococcus aureus. [Result] The ZIF-90/PA composite coating was successfully synthesized on the surface of AZ31B magnesium alloy. Compared with the PA-coated magnesium alloy, the ZIF-90/PA-coated magnesium alloy exhibited a significantly increased capacitive arc radius in SBF, a reduction in corrosion current density by one order of magnitude, a positive potential shift by 0.217 V, a notable decrease in hydrogen evolution volume, and an improvement in antibacterial rate from 25.3% to 98.2%. [Conclusion] Compared with the single PA coating, the ZIF-90/PA composite coating exhibits superior corrosion resistance and antibacterial properties, due to its thicker structure, more compact surface conversion film, strong adhesion strength, and the antibacterial effect of zinc ions.
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基本信息:
DOI：10.19289/j.1004-227x.2026.01.004
中图分类号:TG174.4
引用信息:
[1]刘伟,王少冲,纪茜.镁合金表面ZIF-90/PA复合涂层的制备及性能[J].电镀与涂饰,2026,45(01):21-27.DOI:10.19289/j.1004-227x.2026.01.004.
基金信息:
国家自然科学基金(U1504504)