摘要
在模拟油田CO2 腐蚀环境下 ,用XRD、EDS和SEM研究了N80钢腐蚀产物膜的形成与发展情况。结果表明 ,在本试验条件下N80钢CO2 腐蚀产物膜对基体具有一定的保护作用 ,可以降低腐蚀速率。腐蚀产物膜分 3层 ,讨论了 3层膜的结构特征与形成机理。初步研究了腐蚀产物膜的破坏特征。腐蚀产物膜的晶体类型是(Fe,Ca)CO3
While simulating the environment of CO 2 corrosion in oilfield,XRD,EDS and SEM techniques were adopted to study the formation and development of CO 2 corrosion product film on N80 steel.The results demonstrated that the corrosion scales could protect matrix of N80 steel and then reduce the corrosion rate.There were three layers in CO 2 corrosion product film.Structural characteristics and formation mechanism of the film were discussed respectively.At the same time,breakage of FeCO 3 scale was studied.The CO 2 corrosion scale was (Fe,Ca)CO 3.
出处
《中国腐蚀与防护学报》
CAS
CSCD
2002年第3期143-147,共5页
Journal of Chinese Society For Corrosion and Protection
基金
国家重点基础研究发展规划项目G19990 65 0
中国石油天然气集团公司石油管力学和环境行为重点实验室基金项目资助
