西安石油大学学报（自然科学版）2011，Vol.26Issue(5)：78-83,88,7.
油套管用钢P110的CO2腐蚀动力学研究
摘要
Abstract
Under simulation corrosion environment of 3. 5% NaCl solution,2MPa CO2 partial pressure and 100℃, the corrosion weight loss, the electrochemical characteristics of interface reaction, the morphology, composition and structural features of the corrosion product films of tubing and casing steel P110 were studied by means of high-temperature high-pressure test and electrochemical in-situ measurement technique,as well as scanning electron microscope (SEM) .energy disperse spectroscopy (EDS) and X-Ray diffraction ( XRD) analysis methods. CO2 corrosion kinetics of tubing and casing steel P110 was also discussed. The results show that,CO2 corrosion product of tubing and casing steel P110 is FeCO, ,and the average corrosion rate becomes lower and lower with the increase of corrosion time. Trie growth of the corrosion product film presents parabolic law: the particles of FeCO3 are growing up and stack together at beginning,and gradually cover the metal surface to form a film. Trie thickness of the corrosion product film increases firstly and then trends stable,and its protection effect to metal surface enhances with its thickness increasing. EIS shows that with the reaction time increasing, polarization resistance increases gradually and the electrode reaction controlled by activation at first becomes gradually controlled by diffusion.关键词
油套管用钢P110/CO2腐蚀/电化学原位测量/腐蚀动力学Key words
tubing and casing steel P110/CO, corrosion/electrochemical in-situ measurement/corrosion kinetics分类
矿业与冶金引用本文复制引用
吕祥鸿,李娜,赵国仙,王宇,张建兵..油套管用钢P110的CO2腐蚀动力学研究[J].西安石油大学学报（自然科学版）,2011,26(5):78-83,88,7.基金项目
国家自然科学基金项目(编号:50704026) （编号:50704026）
教育部新世纪优秀人才支持计划项目(编号:NCET-07-0686) （编号:NCET-07-0686）
