油管钢在CO2／H2S环境中的腐蚀产物及腐蚀行为  

Corrosion Products and Corrosion Behavior of Tubing Steel in CO_2/H_2S Environment

作　　者：闫伟[1] 邓金根[1] 董星亮[2] 张春阳 李立宏 李晓蓉[1] 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中海石油(中国)有限公司,北京100600

出　　处：《腐蚀与防护》2011年第3期193-196,共4页Corrosion & Protection

摘　　要：对CO_2/H_2S环境中常规油管钢的腐蚀产物的已有研究成果进行了归纳分析,结果表明,在100℃附近,CO_2/H_2S共存环境中,油管钢表面形成的FeS膜的保护性优于FeCO_3,对金属腐蚀有抑制作用。总结出了油管钢的两类分压比规律:第一类分压比,体系中的CO_2分压保持不变,逐渐增加H_2S的分压,腐蚀速率会出现极值;第二类分压比,体系中的H_2S分压保持恒定,腐蚀速率会随着CO_2分压的升高而增加。这对于进一步完善CO_2/H_2S腐蚀理论以及油气田合理选择油套管材料均有一定指导意义。The corrosion products of tubing steels in CO2/H2 S environmental was analyzed. It was found that at about 100 ℃, the formed FeS film was more protective than FeCO3. The corrosion behavior was studied at different partial pressure ratios. When CO2 partial pressure was stable, increasing the H2S partial pressure would result in a maximum of the corrosion rate. When the H2S partial pressure was stable, the corrosion rate, increased with the increase of CO2 partial pressure. The result is helpful to complete the theory of CO2/H2S corrosion and selection of tubing steels.

关 键 词：CO2/H2S腐蚀 油管钢 腐蚀产物 分压比 

分 类 号：TG172.3[金属学及工艺—金属表面处理]