矿化膜对环氧树脂/矿化膜复合涂层在Mg⁃3Nd合金表面附着力的影响  

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

作　　者：马鸿斌 刘晔 何金龙 成思婷 张彩虹 彭勇 MA Hongbin;LIU Ye;HE Jinlong;CHENG Siting;ZHANG Caihong;PENG Yong(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;Key Laboratory of Magnetism and Magnetic Material of Ministry of Education,Lanzhou University,Lanzhou Gansu 730000,China)

机构地区：[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

出　　处：《电子显微学报》2024年第4期429-439,共11页Journal of Chinese Electron Microscopy Society

基　　金：青海省自然科学基金资助项目(Nos.2023-ZJ-730,2023.01-2025.12).

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。Magnesium and its alloys are widely used due to their low density,but they 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 result confirm that the epoxy resin/mineralized film composite coating provides excellent adhesion to the alloy surface.

关 键 词：镁合金 微观结构 复合涂层 涂层附着力 矿化处理 

分 类 号：TG178[金属学及工艺—金属表面处理] TB31[金属学及工艺—金属学] TG115.215.3[一般工业技术—材料科学与工程]