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

FENG Huanzhi, LIU Zixuan, WU Guangai, YANG Zhile, XING Xijin, WANG Zhu

doi:10.16577/j.issn.1001-1560.2024.0133

Materials Protection >

2024 , Vol. 57 >Issue 6: 102 - 112

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0133

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

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(1. CNOOC Research Institute Co., Ltd., Beijing 100028, China;2. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China)

WANG Zhu(1990-), Associate Professor, Researeh Focus: Corrosion and Protection in the Oil and Gas Industry, Tel.: 010-62333972, E-mail: wangzhu1303@126.com

Received date: 2023-09-25

Revised date: 2023-11-14

Accepted date: 2023-11-20

Online published: 2024-06-24

Supported by

Science and Technology Project of China National Offshore Oil Corporation(KJGG-2022-12-CCUS-0104)

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Abstract

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 CO₂ 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 CO₂-H₂O 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 CO₂ environments. Increased permeability and expansion rates, and decreased mechanical properties were observed after supercritical CO₂ 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 CO₂ 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.

Key words： CCUS; supercritical CO₂; corrosion; aging; metal; non-metal; impurity

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FENG Huanzhi, LIU Zixuan, WU Guangai, YANG Zhile, XING Xijin, WANG Zhu . Research Progress on Corrosion and Material Selection of CCUS Offshore Pipeline Facilities[J]. Materials Protection, 2024 , 57(6) : 102 -112 . DOI: 10.16577/j.issn.1001-1560.2024.0133

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