氧化石墨烯涂层/钢基体系统界面结合性能

Interfacial Bonding Properties of Graphene Oxide Coating/ Steel Substrate System

摘要:

采用试验和有限元模拟方法研究了不同氧化石墨烯（GO）含量的涂层/钢基体系统在海洋环境下的界面结合性能。结合数字图像相关法（DIC）的拉伸试验，分析氧化石墨烯涂层的断裂强度、断裂韧性和界面剪切强度，并使用有限元方法模拟涂层/钢基体系统的涂层表面与界面裂纹开裂过程。结果表明：随着GO含量的增加，GO对涂层/钢基体系统界面结合性能的提升效果先增强后减弱；含量为0.3%的氧化石墨烯涂层在腐蚀后具有最优的界面结合性能；GO的添加对系统界面结合性能中涂层韧性的提升最为显著。

Abstract:

The interfacial bonding properties of coating/steel substrate system with different graphene oxide （GO） content in marine environment were studied by experimental and finite element simulation methods. The fracture strength， fracture toughness and interfacial shear strength of the graphene oxide coating were calculated through the tensile test combined with the results obtained from digital image correlation method（DIC） . The finite element method was used to simulate the surface and interface cracking processes of the coating/steel substrate system. The results show that the enhancement effect of GO on the interfacial bonding properties of coating/ steel substrate system increases first and subsequently decreases with the increased addition amount of GO. Coating with 0.3% GO has the best interfacial bonding property after corrosion， and the addition of GO has the most significant improvement on the fracture toughness of the coating.