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| 腐蚀产物膜覆盖条件下油套管钢C02腐蚀电化学特征 | |
| 引用本文： | 陈长风,路民旭,赵国仙,严密林,白真权,杨延清. 腐蚀产物膜覆盖条件下油套管钢C02腐蚀电化学特征[J]. 中国腐蚀与防护学报, 2003, 23(3): 139-143 |
| 作者姓名： | 陈长风 路民旭 赵国仙 严密林 白真权 杨延清 |
| 作者单位： | 1. 北京科技大学材料科学与工程学院,北京,100083;西北工业大学材料科学与工程学院,西安,710072 2. 北京科技大学材料科学与工程学院,北京,100083;中国石油天然气集团公司管材研究所,西安,710065 3. 中国石油天然气集团公司管材研究所,西安,710065 4. 西北工业大学材料科学与工程学院,西安,710072 |
| 基金项目： | 国家自然科学基金重点资助项目 ( 5 0 2 3 10 2 0 )，国家 973重点基础研究发展规划项目 (G19990 65 0 )资助 |
| 摘 要： | 采用动电位扫描和交流阻抗技术研究了腐蚀产物膜覆盖条件下2种油套管钢CO2腐蚀电化学特征．结果表明，油套管钢表面生成腐蚀产物膜以后可以显著降低腐蚀电流密度，EIS图谱中出现Warburg阻抗特征，含Cr油套管钢CO2腐蚀产物膜对基体的保护作用要优于N80钢．N80油套管钢在CO2腐蚀过程中的点蚀会使交流阻抗谱出现容抗弧特征． |
| 关 键 词： | CO2腐蚀 交流阻抗 动电位 N80 含Cr油套管钢 |
| 文章编号： | 1005-4537(2003)03-0139-05 |
ELECTROCHEMICAL CHARACTERISTICS OF CO2 CORROSION OF WELL TUBE STEELS WITH CORROSION SCALES |
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| CHEN Changfeng ,,LU Minxu ,,ZHAO Guoxian ,YAN Milin ,BAI Zhenquan ,YANG Yanqing. ELECTROCHEMICAL CHARACTERISTICS OF CO2 CORROSION OF WELL TUBE STEELS WITH CORROSION SCALES[J]. Journal of Chinese Society For Corrosion and Protection, 2003, 23(3): 139-143 | |
| Authors: | CHEN Changfeng LU Minxu ZHAO Guoxian YAN Milin BAI Zhenquan YANG Yanqing |
| Affiliation: | CHEN Changfeng 1,3,LU Minxu 1,2,ZHAO Guoxian 2,YAN Milin 2,BAI Zhenquan 2,YANG Yanqing 3 |
| Abstract: | The potentiodynamic and electrochemical impedance techniques were employed to study the electrochemical characteristics of CO 2 corrosion of two kinds of well tube steels with corrosion scales.The results showed that after corrosion scale formed on well tube steels,corrosion current density would decrease observably,the character of Warburg impedance could be found in electrochemical impedance spectra and the protection of corrosion scale of Cr-containing well tube steel was better than N80 steel mainly because the porosity of Cr-containing well tube steel was lower then that of N80 steel.Because of the pitting electrode process of N80 steel,the capacitance loop would present itself in EIS at low frequency range. |
| Keywords: | CO 2 corrosion EIS potentiodynamic N80 steel Cr-containing well tube steel |
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