矿化膜对环氧树脂/矿化膜复合涂层Mg-3Nd合金表面附着力的影响

矿化膜对环氧树脂/矿化膜复合涂层Mg-3Nd合金表面附着力的影响

                                                 马鸿斌^#*，刘  晔^#，何金龙，成思婷，张彩虹，彭  勇^*

(1.青海大学 高性能轻金属合金与成形工程研究中心，青海省新型轻合金重点实验室，青海 西宁 810016；2.兰州大学 物理科学与技术学院，甘肃 兰州 730000)

摘    要   镁及其合金因为其低密度应用于诸多领域，但镁合金耐腐蚀性较差。环氧树脂作为一种优良的耐腐蚀涂层广泛应用于镁合金表面，但环氧树脂附着力有待提升。本文采用一种新的矿化方法，系统研究在Mg-3Nd合金表面添加环氧树脂/矿化膜复合涂层对力学性能的影响和环氧树脂/矿化膜复合涂层与单层的环氧树脂涂层在Mg-3Nd合金表面附着力的变化。研究结果表明：通过拉伸试验可以得知，Mg-3Nd合金与表面添加环氧树脂/矿化膜复合涂层的Mg-3Nd合金的力学性能强度差距不足1%；通过对涂覆环氧树脂/矿化膜复合涂层与单层的环氧树脂涂层的Mg-3Nd合金进行不同拉伸程度测试，可以发现环氧树脂/矿化膜复合涂层的附着力要大于单层环氧树脂涂层；在拉脱实验中环氧树脂/矿化膜复合涂层的抗拉脱性能是环氧树脂涂层的4.84倍，证明合金表面的环氧树脂/矿化膜复合涂层具有优异的附着力。

关键词    镁合金；微观结构；复合涂层；涂层附着力；矿化处理

中图分类号：TG178；TB31；TG115.21⁺5.3          文献标识码：A  

Effect of mineralized film on the adhesion of epoxy resin/mineralized film composite coatings on Mg-3Nd alloy surfaces

MA Hongbin^1#* ，LIU Ye^1# ，HE Jinlong¹ ，ZHANG Caihong¹ ，PENG Yong^2*

(1. Qinghai Provincial Key Laboratory of  New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining Qinghai 810016；2. Key Laboratory of Magnetism and Magnetic Material of Ministry of Education, Lanzhou University, Lanzhou Gansu 730000 , China)

Abstract   Magnesium and its alloys are widely useddue to their low density, butthey are prone to poor corrosion resistance. Epoxy resin is commonly employed as a corrosion-resistant coating for magnesium alloys. However, its adhesion properties often require improvement. In this study, a novel mineralization method was utilized to systematically investigate the effects of adding an epoxy resin/mineralized film composite coating to the surface of Mg-3Nd alloys. The research focused on comparing the mechanical properties and adhesion of the epoxy resin/mineralized film composite coating with those of a single-layer epoxy resin coating applied to Mg-3Nd alloys. The findings of the study are as follows: Tensile tests revealed that the strength difference between Mg-3Nd alloy and Mg-3Nd alloy coated with the epoxy resin/mineralized film composite is less than 1%. Testing under various tensile strength levels showed that the epoxy resin/mineralized film composite coatings exhibited superior adhesion compared to the single-layer epoxy resin coating. Pull-off tests demonstrated that the pull-off resistance of the epoxy resin/mineralized film composite coating was 4.84 times greater than that of the single-layer epoxy resin coating. These results confirm that the epoxy resin/mineralized film composite coating provides excellent adhesion to the alloy surface.

Keywords    magnesium alloy; microstructure; composite coating; coating adhesion; mineralization treatment

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