采用共沉淀和水热合成法在AZ31B镁合金上制备了MgAl-LDH-MoO₄^2-水滑石（LDH）涂层，利用X射线衍射（XRD）、扫描电子显微镜（SEM）和红外光谱仪（FT-IR）对其形貌进行表征。采用电化学方法分析了试样在3.5%（质量分数）NaCl溶液中浸泡数天后的腐蚀行为。结果表明：MgAl-LDH-MoO₄^2-涂层均匀、连续地生长在AZ31B镁合金表面；作为缓蚀剂的钼酸根离子成功插入层间，在腐蚀性氯离子环境中响应释放，具有良好的缓蚀性能和离子交换性能。此外，采用FDTS（1H，1H，2H，2H-全氟癸基三乙氧基硅烷）对水滑石涂层表面进行的疏水改性处理，进一步延长了水滑石涂层的寿命。

MgAl-LDH-MoO₄^2- layered double hydroxide (LDH) coating was deposited on AZ31B magnesium alloy by coprecipitation and hydrothermal method. X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform-infrared spectoscopy (FT-IR) were used to characterize the morphology of the coating. Electrochemical methods were used to analyze the corrosion behavior of specimens immersed in 3.5% (mass fraction) NaCl solution for several days. The results showed that MgAl-LDH-MoO₄^2- coating grew uniformly and continuously on the surface of AZ31B magnesium alloy. The molybdate ion as corrosion inhibitor was successfully inserted into the interlayer and released in corrosive chloride ion environment with good corrosion inhibition performance and ion exchange performance. In addition, hydrophobic modification of the surface of hydrotalcite coating with FDTS (1H, 1H, 2H, 2H-Per fluorodecyltriethoxysilane) further extended the life time of the hydrotalcite coating.