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Epoxy resins are widely used as matrices for bonding carbon fiber tightly together in fabricating carbon fiber reinforced polymer (CFRP), which has been increasingly used in marine and offshore applications. To analyze CFRP performance in salt environment, it requires a fundamental understanding of the behavior of carbon fiber/epoxy interface under saltwater exposure. Here the molecular interface model of carbon fiber/epoxy bonded system is constructed to analyze the interfacial integrity in salt environment. The simulation results show that salt solution leads to largest loss of interfacial adhesion, which correlates with structural and mechanical degradation of bonded interface, as indicated by the decreased epoxy density close to interface and reduced interfacial stress as compared to dry and wet case. Through examining interfacial structure and stress during pulling process, it is observed that epoxy detaches …