剥离涂层下的埋地管线钢腐蚀研究进展与展望

 管线钢作为石油、天然气集输和煤炭、建材浆体输送的长输管,在现代长输工业中具有不可替代的地位。现代管线钢多采用涂层作为外防腐措施,在埋地安装和使用过程不可避免地因外力作用破损形成剥离区,由于电解质渗入和长期的化学和电化学演变,形成剥离涂层下特有的腐蚀体系,可加速折损管线钢的服役寿命,给生产生活带来极大的潜在危险。因此,剥离涂层下的管线钢腐蚀,是国内外腐蚀领域学者研究的最重点和最前沿课题之一。本文结合近年国内外的研究成果,对剥离体系的研究方法、经典理论、影响因素和研究进展进行总结综述。同时针对既有不足,对未来的研究工作进行展望。

Research Progress and Prospect in the Corrosion of Buried Pipeline Steel with Disbonded Coating

Pipeline steel holds an irreplaceable position in the modern long distance industry, it is most commonly used in the transportation involving petroleum, gas, coal, and building materials slurry. Most of modern pipeline steel is taken coating as the outer anti-corrosion measures, inevitable resulting in disbonded areas due to external force during the process of buried installation and use. With the electrolyte infiltration and long-term chemical and electrochemical evolution, it forms a special corrosion system in the disbonded area, which could shorten the service life of the pipeline steel quickly, and causing a great potential hazard to industrial production and people's daily life. Therefore, the corrosion of pipeline steel with the disbonded coating has the highest priority and becomes a cutting-edge research topic of the scholars in the corrosion filed at home and aboard. A summary on disbonded system with domestic and foreign research is made from the aspects of research model, classical theory, impact factors, and research progress in recent years. Based on the insufficient result of existing research, the prospect for the future work is investigated.