Numerical Simulation of Pipeline Corrosion via Coupled Nonisothermal Turbulent Heat Transfer and Electrochemical Models

Carbon capture, utilization, and storage (CCUS) technology is crucial for mitigating climate change and reducing greenhouse gas emissions, with pipeline transportation efficiency and cost significantly impacting the system's economy and sustainability. This paper investigates high‐CO₂‐content fluids in CCUS‐EOR systems and analyzes pipeline corrosion mechanisms through numerical simulation and experimental research. A multiphysics‐coupled model combining computational fluid dynamics (CFD) and electrochemical principles was developed to analyze the heat transfer process and electrochemical corrosion characteristics in pipelines. The study focuses on how parameters like temperature, velocity, pipe diameter, and pH value affect the pipeline corrosion rate. Results indicate that increasing pipe diameter enhances local turbulent flow acceleration, with the maximum velocity reaching 28.835 m/s. Lower pH levels lead to higher corrosion rates, up to 8.024 mm/year under acidic conditions. Traditional corrosion control measures offer limited protection in highly corrosive conditions, but the combined strategy of protective coatings with cathodic protection provides durability.