Research on the Damage Mechanisms of Interface in Offshore Floating LCO2 Cryogenic Hose under LCO2 Corrosion

Offshore CO2 storage is one of the effective measures to achieve “Carbon peak and carbon neutrality” strategic goals. The operation form can be divided into two types based on the depth of the target sea area: underwater pipeline transportation and LCO2 carrier transportation. To solve the LCO2 transport problem between the transport ship and the receiving equipment, it is crucial to consider the performance degradation of interfaces of LCO2 cryogenic hoses, establish a simulation analysis model that takes into account the degradation of interface mechanical properties, and eveluate the ultimate load-bearing capacity and stiffness changes of floating LCO2 cryogenic hoses after long-term corrosion. This chapter focuses on the mechanical properties of steel wire and the interface strength of steel wire-HDPE bonding, established an experimental platform for CO2 corrosion and studies the attenuation of mechanical properties before and after corrosion. A simulation analysis model is established considering the degradation of interface machanical properties, and the damage mechanism of floating LCO2 cryogenic hoses after long-term corrosion is explored, laying the foundation for the reliability and safety of hoses in long-term service.