宽滞后铜基记忆合金管接头在海洋工程中的管道连接上具有重要的使用价值，管道一旦遇到突发事件导致破裂时其能起到迅速堵漏连接的作用。然而，宽滞后铜基形状记忆合金管接头储存和服役过程中的不同结构组成模式，使得其在海洋环境下的腐蚀行为变得复杂。本项目拟采用电化学分析、SCEM、AFM(Tapping mode)和XPS等手段研究宽滞后铜基形状记忆合金在海洋环境下储存、服役过程中合金不同的结构相之间的腐蚀行为及其机理，揭示不同的结构相组成模式对合金服役过程中腐蚀萌生及其动态演化发展过程的影响规律，探明结构相的组成模式与腐蚀性能之间的内在联系，为高耐蚀宽滞后铜基形状记忆合金管接头的设计奠定理论与实践基础。

Cu-based shape memory alloys (SMAs) with wide hysteresis have found important technical applications in marine engineering. They are ideally suited for use in stationary sealing conditions as pipe coupling. However, the constituent modes of the microstructure phases of the alloy in the storage and service state were various, resulting in the complication of the corrosion behavior of the alloy. In this study, electrochemical analysis, SECM, Tapping mode AFM and XPS will be used to investigate the galvanic corrosion behavior and the evolution among the microstructure phases. The corrosion initiation and dynamic evolution mechanism associated with the constituent mode of the microstructure phase in coupling will also be investigated in marine environment during storage and service. The intrinsic relationship between the corrosion properties and the constituent mode of the microstructure phases in the alloy will be explored. The corrosion mechanism associated with the constituent mode of the microstructure phase in the wide hysteresis Cu-based shape memory alloy will be verified, which could help to develop the couplings with high corrosion resistance.