摘要
在模拟油田CO2 腐蚀环境下 ,利用XRD、EDS和SEM研究了N80钢点蚀坑的形成与发展 .结果表明 ,Cl-会在腐蚀产物膜与金属界面处富积成核 ,加速该区域的阳极溶解 ,促使点蚀坑的形核 ;点蚀坑内也有Cl-富积 ,在膜与基体界面处形成厚度为 3 μm的富积层 ,加速点蚀坑内基体的腐蚀 ,使得点蚀坑进一步发展 .同时 。
In simulating the environment of CO_2 corrosion in oilfield,the XRD,EDS and SEM techniques were adopted to study the formation and development of CO_2 pitting corrosion on N80 steel.The results demonstrated that Cl - anions could be enriched and nucleated at the interface between corrosion scale and matrix,which subsequently catalyzed the formation of pitting.Whereas pits could also be enriched by Cl - forming approximately 3 μm enrichment layer at interface,thus leading to the further development of pitting.In present case,the relationship between mechanisms of anodic reaction and morphology of pitting was discussed.
出处
《中国腐蚀与防护学报》
CAS
CSCD
2003年第1期21-25,共5页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金重点资助项目 ( 5 0 2 310 2 0 )
国家 973重点基研究发展规划项目 (G19990 65 0 0 4)
