CCUS海上管线设施的腐蚀与选材研究进展  

Research Progress on Corrosion and Material Selection of CCUS Offshore Pipeline Facilities

作　　者：冯桓榰 刘子轩 武广瑷 杨芝乐 邢希金 王竹 FENG Huanzhi;LIU Zixuan;WU Guangai;YANG Zhile;XING Xijin;WANG Zhu(CNOOC Research Institute Co.,Ltd.,Beijing 100028,China;Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]北京科技大学新材料技术研究院,北京100083

出　　处：《材料保护》2024年第6期102-112,共11页Materials Protection

基　　金：中国海洋石油集团公司科技课题(KJGG-2022-12-CCUS-0104)。

摘　　要：海上碳捕集、利用与封存(CCUS)腐蚀环境相对陆上更为恶劣,管道与设施外部处于海洋环境中,内部为超临界CO_(2)及腐蚀性杂质。综述了CCUS中海上设施的腐蚀风险与选材情况。金属的腐蚀风险包括CO_(2)-H_(2)O相诱发的腐蚀风险、气相杂质诱发的腐蚀风险、Cl^(-)诱发的腐蚀风险。金属的选材主要包括碳钢、低合金钢、耐蚀合金等,应依据不同的CCUS工况选择合适的金属材料。此外,非金属材料在超临界CO_(2)介质环境中受到化学腐蚀及物理降解,在超临界CO_(2)测试后,非金属材料的渗透率、膨胀率增大,力学性能下降。长周期服役后,非金属管道存在老化风险。目前,超临界CO_(2)体系下材料的腐蚀失效机理研究有待进一步完善,CCUS海上设施选材还不成熟,尤其是在含有多种杂质气体的复杂工况下,仍需要更多地研究完善CCUS海上设施材料的选择体系,以支撑海上CCUS技术规模化应用。The corrosion environment of offshore carbon capture,utilization and storage(CCUS)is harsher compared to onshore conditions,with pipelines and facilities exposed to marine environments externally and containing supercritical CO_(2) and corrosive impurities internally.In this paper,the corrosion risks and material selection for offshore facilities in CCUS were reviewed.The corrosion risks of metals included those induced by CO_(2)-H_(2)O phases,gas-phase impurities and Cl^(-).Material selection for metals mainly involved carbon steel,low-alloy steel and corrosion-resistant alloys,which were chosen according to different CCUS conditions.Additionally,non-metallic materials underwent chemical corrosion and physical degradation in supercritical CO_(2) environments.Increased permeability and expansion rates,and decreased mechanical properties were observed after supercritical CO_(2) testing.There was a risk of aging in non-metallic pipelines after long-term service.At present,further improvement was needed in understanding the corrosion failure mechanisms of materials in supercritical CO_(2) systems.Material selection for CCUS offshore facilities was still immature,especially under complex conditions involving multiple impurity gases,requiring more research to refine the selection system of CCUS offshore facility materials and support the large-scale application of CCUS offshore technology.

关 键 词：CCUS 超临界CO_(2)腐蚀 老化 金属 非金属 杂质 

分 类 号：TG172[金属学及工艺—金属表面处理]