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| 高温高压下Cl-浓度、CO2分压对13 Cr不锈钢点蚀的影响 | |
| 引用本文： | 吕祥鸿,赵国仙,樊治海,杨延清,陈长风,路民旭.高温高压下Cl-浓度、CO2分压对13 Cr不锈钢点蚀的影响[J].材料保护,2004,37(6):34-36. |
| 作者姓名： | 吕祥鸿 赵国仙 樊治海 杨延清 陈长风 路民旭 |
| 作者单位： | 1. 西北工业大学材料科学与工程学院,陕西,西安,710072 2. 中国石油天然气集团公司管材研究所,陕西,西安,710065 3. 北京科技大学腐蚀与防护中心,北京,100083 |
| 摘 要： | 为了研究CO2分压、Cl-浓度对13Cr油井管钢点蚀行为的影响,用电化学方法模拟塔里木油田环境进行了腐蚀试验.结果表明,在模拟条件下,13Cr钢的再钝化能力较差;Cl-是造成13Cr钢发生孔蚀的主要原因,在较高Cl-浓度下,点蚀诱发敏感性增强,EIS图谱的低频端出现典型的点蚀诱导期和发展期特征;随着CO2分压的增大,促使孔蚀的发生和发展,蚀孔内的阳极反应电流密度加强,溶液黏度加大,从而使蚀孔内的扩散传质过程受阻. |
| 关 键 词： | 点蚀 电化学 13Cr钢 CO2分压 Cl-浓度 高温高压 浓度 不锈钢 影响 High Pressure High Temperature Stainless Steel Behavior Pitting Partial Concentration 传质过程 扩散 黏度 溶液 加强 电流密度 阳极反应 孔内 发生和发展 |
| 文章编号： | 1001-1560(2004)06-0034-03 |
| 修稿时间： | 2003年12月18日 |
Effects of Cl- Concentration and CO2 Partial Pressure on Pitting Behavior of 13Cr Stainless Steel under High Temperature and High Pressure |
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| LV Xiang-hong,ZHAO Guo-xian,FAN Zhi-hal,YANG Yan-qing,CHEN Chang-feng,LU Min-xu.Effects of Cl- Concentration and CO2 Partial Pressure on Pitting Behavior of 13Cr Stainless Steel under High Temperature and High Pressure[J].Journal of Materials Protection,2004,37(6):34-36. | |
| Authors: | LV Xiang-hong ZHAO Guo-xian FAN Zhi-hal YANG Yan-qing CHEN Chang-feng LU Min-xu |
| Affiliation: | LV Xiang-hong~1,ZHAO Guo-xian~2,FAN Zhi-hal~2,YANG Yan-qing~1,CHEN Chang-feng~3,LU Min-xu~3 |
| Abstract: | Pitting behaviors of 13Cr stainless steel were studied in the stimulated environment of Talimo oil field by electrochemical method. The results show that the re-passivation ability of 13Cr stainless steel is worse, and C1~- is the main factor for pitting initiation. Under the condition of higher C1~- concentration the susceptibility to pitting initiation increases, and the characteristics of pitting initiation and propagation appear on the low-frequency part of EIS. As the CO_2 partial pressure increases, the pitting initiation and propagation are accelerated, and then the mass transport process in the inner of pits is retarded because the anodic current density increases greatly resulted in increase of viscosity. |
| Keywords: | pitting electrochemical method 13Cr steel CO_2 partial pressure Cl~- concentration |
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