用于集输管线的0.5Cr钢在模拟塔里木油田环境中的H2S/CO2腐蚀行为研究

doi:10.7623/syxb200905028

石油学报 ›› 2009, Vol. 30 ›› Issue (5): 782-787.DOI: 10.7623/syxb200905028

用于集输管线的0.5Cr钢在模拟塔里木油田环境中的H₂S/CO₂腐蚀行为研究

吕祥鸿¹, 赵国仙¹, 张建兵², 韩勇³, 常泽亮⁴

1. 西安石油大学材料科学与工程学院, 陕西西安 710065;
2. 西安石油大学机械工程学院, 陕西西安 710065;
3. 西安摩尔石油工程实验室, 陕西西安 710065;
4. 中国石油塔里木油田分公司勘探开发研究院, 新疆库尔勒 841000

收稿日期:2008-10-07 修回日期:2009-01-07 出版日期:2009-09-25 发布日期:2010-05-21
作者简介:吕祥鸿,男,1971年7月生,2006年毕业于西北工业大学,现在西安石油大学材料科学与工程学院任教,主要从事油气田腐蚀与防护研究.E-mail:lxhong71@sina.com.cn
基金资助:
国家自然科学基金项目(No.50704026)资助

Experimental study on corrosion behaviors of H₂S and CO₂ to 0.5 Cr steel used in gathering pipeline at simulated environment of Tarim Oilfield

Lü Xianghong¹, ZHAO Guoxian¹, ZHANG Jianbing², HAN Yong³, CHANG Zeliang⁴

1. School of Material Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China;
2. School of Mechanical Engineering, Xi'an Shiyou University, Xi'an 710065, China;
3. Xi'an Maurer Petroleum Engineering Laboratory, Xi'an 710065, China;
4. Exploration and Production Research Institute, PetroChina Tarim Oilfield Company, Kuerle 841000, China

Received:2008-10-07 Revised:2009-01-07 Online:2009-09-25 Published:2010-05-21

摘要/Abstract

摘要： 运用腐蚀失重和四点弯曲实验,参照NACE0177-2005标准研究了用于集输管线的0.5Cr钢在模拟塔里木油田腐蚀环境中的H₂S/CO₂腐蚀行为.结果表明,0.5Cr钢在CO₂腐蚀环境中具有极高的均匀腐蚀速率,H₂S腐蚀性气体的存在显著降低了材料的均匀腐蚀速率.在CO₂分压为2MPa、H₂S分压为0.5MPa时,腐蚀速率仅为0.152 3mm/a,表现出良好的抗均匀腐蚀和局部腐蚀能力.在H₂S和CO₂共存的环境条件下,0.5Cr钢表面的腐蚀产物为FeS,未出现CO₂腐蚀产物成分FeCO₃.在该模拟条件下,H₂S的腐蚀占主导作用.同时模拟油田工况条件的抗H₂S应力腐蚀开裂实验表明,0.5Cr钢具有良好的抗H₂S应力腐蚀开裂能力.

关键词: 0.5Cr钢, 集输管线, H₂S/CO₂腐蚀行为, 均匀腐蚀, 局部腐蚀, H₂S应力腐蚀开裂实验

Abstract: According to the NACE 0177-2005 standard,the corrosion behaviors of H₂S and CO₂ to 0.5Cr steel used in gathering pipeline at the simulated environment of Tarim Oilfield were studied with the mass loss and four-point bent test.The results showed that the 0.5Cr steel had very high uniform corrosion rate at CO₂ corrosion environment,and the occurrence of H₂S reduced the corrosion rate of 0.5Cr steel.The corrosion rate of 0.5Cr steel was only 0.152 3 mm per year,when the partial pressure of CO₂ was 2 MPa and partial pressure of H₂S was 0.5 MPa.Under those conditions,0.5Cr steel presented the superior uniform and local corrosion resistance.At the simulated CO₂ and H₂S coexistence environment,the corrosion product was FeS,and H₂S electrochemical corrosion dominated the corrosion course of 0.5Cr steel.The test showed that 0.5Cr steel had the favorable resistance to H₂S stress corrosion cracking at the simulated environment.

Key words: 0.5Cr steel, gathering pipeline, H₂S and CO₂ corrosion behaviors, uniform corrosion, local corrosion, H₂S stress corrosion cracking test

中图分类号:

TE172.8

吕祥鸿, 赵国仙, 张建兵, 韩勇, 常泽亮. 用于集输管线的0.5Cr钢在模拟塔里木油田环境中的H₂S/CO₂腐蚀行为研究[J]. 石油学报, 2009, 30(5): 782-787.

Lü Xianghong, ZHAO Guoxian, ZHANG Jianbing, HAN Yong, CHANG Zeliang. Experimental study on corrosion behaviors of H₂S and CO₂ to 0.5 Cr steel used in gathering pipeline at simulated environment of Tarim Oilfield[J]. Editorial office of ACTA PETROLEI SINICA, 2009, 30(5): 782-787.

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[2]	袁相启. 原油集输管线的电热解堵[J]. 石油学报, 1985, 6(2): 109-116.

用于集输管线的0.5Cr钢在模拟塔里木油田环境中的H₂S/CO₂腐蚀行为研究

Experimental study on corrosion behaviors of H₂S and CO₂ to 0.5 Cr steel used in gathering pipeline at simulated environment of Tarim Oilfield

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