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| 温度、Cl-浓度、Cr元素对N80钢CO2腐蚀电极过程的影响 | |
| 引用本文： | 陈长风,路民旭,赵国仙,白真权,严密林,杨延清.温度、Cl-浓度、Cr元素对N80钢CO2腐蚀电极过程的影响[J].金属学报,2003,39(8):848-854. |
| 作者姓名： | 陈长风 路民旭 赵国仙 白真权 严密林 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;中国石油天然气总公司石油管材研究所,西安,710065 3. 中国石油天然气总公司石油管材研究所,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： | 国家自然科学基金项目50231020和国家重点基础研究发展规划项目G1999065004资助 |
| 摘 要： | 利用电化学阻抗技术研究了温度、Cl^-浓度、Cr元素对N80钢CO2腐蚀电极过程的影响，结果表明，随着温度的升高，CO2腐蚀的阴极、阳极电极反应速率会明显增大，与此同时，温度的升高又容易使腐蚀产物膜在试样表面形成，对基体金属起到一定的保护作用，增加介质中的Cl^-浓度，会使阳极溶解速率先增加，后减小；阴极还原速率则缓慢减小；同时，Cl^-还会破坏腐蚀产物膜在试样表面的覆盖，N80钢加入Cr元素以后，CO2腐蚀阴极、阳极反应速率降低，材料具有一定的抗CO2腐蚀能力。 |
| 关 键 词： | CO2腐蚀 电化学阻抗 含CrN80钢 Cl^-浓度 |
| 文章编号： | 0412-1961(2003)08-0848-07 |
| 修稿时间： | 2002年5月15日 |
EFFECTS OF TEMPERATURE, Cl-CONCENTRATION AND Cr ON ELECTRODE REACTIONS OF CO2 CORROSION OF N80 STEEL |
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| CHEN Changfeng,LU Minxu,ZHAO Guoxian,BAI Zhenquan,YAN Milin,YANG Yanqing School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing Tubular Goods Research Center of CNPC,Xi'an School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an.EFFECTS OF TEMPERATURE, Cl-CONCENTRATION AND Cr ON ELECTRODE REACTIONS OF CO2 CORROSION OF N80 STEEL[J].Acta Metallurgica Sinica,2003,39(8):848-854. | |
| Authors: | CHEN Changfeng LU Minxu ZHAO Guoxian BAI Zhenquan YAN Milin YANG Yanqing School of Materials Science and Engineering University of Science and Technology Beijing Beijing Tubular Goods Research Center of CNPC Xi'an School of Materials Science and Engineering Northwestern Polytechnical University Xi'an |
| Affiliation: | CHEN Changfeng,LU Minxu,ZHAO Guoxian,BAI Zhenquan,YAN Milin,YANG Yanqing 1) School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083 2) Tubular Goods Research Center of CNPC,Xi'an 710065 3) School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072 |
| Abstract: | The electrochemical impedance spectroscopy (EIS) was used to analyse the effects of temperature, Cl- concentration and Cr on the CO2 corrosion electrode reactions of steel N80. The results show that temperature will increase the anodic and cathodic reaction rate obviously, at the same time, increasing the temperature can also make corrosion scale form easily, which could protect the matrix metal. With increasing Cl- concentration, the cathodic reaction rate will decrease and anodic reaction rate will increase at first, then decrease. Cl- can destroy the coverage of corrosion scale on matrix, increase the matrix metal solution rate at active area. When N80 steel contain Cr element, anodic and cathodic reaction rate all decrease, which means that this kind of steel has certain resistance ability to CO2 corrosion. |
| Keywords: | CO2 corrosion EIS Cr-containing steel N80 Cl- concentration |
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