大牛地气田集输管道低洼处腐蚀机理研究
TG172.3; 为了研究大牛地气田集输管道低洼处腐蚀机理,通过模拟管道沿线积液分布,确定距起点1207 m的管道低洼处为重点监测点,在现场开展管段开挖与挂片安装工作.采用失重测试计算挂片腐蚀速率,结合扫描电镜(SEM)、能谱(EDS)、X射线衍射(XRD)等手段表征腐蚀产物微观结构和成分.结果表明:采气树处挂片均匀腐蚀速率为0.0035 mm/a,腐蚀程度轻微,无明显局部腐蚀倾向;低洼处挂片均匀腐蚀速率为0.0599 mm/a,局部腐蚀速率为0.1380 mm/a,孔蚀系数为2.3,局部腐蚀程度严重.低洼处管段试样表面腐蚀产物结构疏松,腐蚀产物主要由FeCO3、FeS、Fe2O3组成,推测腐...
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| Published in | 材料保护 Vol. 57; no. 8; pp. 122 - 129 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
西南石油大学石油与天然气工程学院,四川 成都 610500%中国石化华北油气分公司石油工程技术研究院,河南 郑州 457001%中国石化华北油气分公司采气一厂,陕西 榆林 719000
15.08.2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1560 |
| DOI | 10.16577/j.issn.1001-1560.2024.0185 |
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| Abstract | TG172.3; 为了研究大牛地气田集输管道低洼处腐蚀机理,通过模拟管道沿线积液分布,确定距起点1207 m的管道低洼处为重点监测点,在现场开展管段开挖与挂片安装工作.采用失重测试计算挂片腐蚀速率,结合扫描电镜(SEM)、能谱(EDS)、X射线衍射(XRD)等手段表征腐蚀产物微观结构和成分.结果表明:采气树处挂片均匀腐蚀速率为0.0035 mm/a,腐蚀程度轻微,无明显局部腐蚀倾向;低洼处挂片均匀腐蚀速率为0.0599 mm/a,局部腐蚀速率为0.1380 mm/a,孔蚀系数为2.3,局部腐蚀程度严重.低洼处管段试样表面腐蚀产物结构疏松,腐蚀产物主要由FeCO3、FeS、Fe2O3组成,推测腐蚀主要由CO2和H2S 2种腐蚀性气体引起,积液中的Cl-起到加速作用. |
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| AbstractList | TG172.3; 为了研究大牛地气田集输管道低洼处腐蚀机理,通过模拟管道沿线积液分布,确定距起点1207 m的管道低洼处为重点监测点,在现场开展管段开挖与挂片安装工作.采用失重测试计算挂片腐蚀速率,结合扫描电镜(SEM)、能谱(EDS)、X射线衍射(XRD)等手段表征腐蚀产物微观结构和成分.结果表明:采气树处挂片均匀腐蚀速率为0.0035 mm/a,腐蚀程度轻微,无明显局部腐蚀倾向;低洼处挂片均匀腐蚀速率为0.0599 mm/a,局部腐蚀速率为0.1380 mm/a,孔蚀系数为2.3,局部腐蚀程度严重.低洼处管段试样表面腐蚀产物结构疏松,腐蚀产物主要由FeCO3、FeS、Fe2O3组成,推测腐蚀主要由CO2和H2S 2种腐蚀性气体引起,积液中的Cl-起到加速作用. |
| Abstract_FL | To investigate the corrosion mechanisms of low-lying areas in the gathering and transportation pipelines of the Daniudi Gas Field,the distribution of accumulated liquid along the pipeline was simulated.A low-lying section of the pipeline located 1207 m from the starting point was identified as the primary monitoring point.Excavation of pipeline sections and installation of coupons were conducted on-site.Weight loss testing was used to calculate the corrosion rates of the coupons,and the microscopic structure and composition of the corrosion products were characterized using scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS) and X-ray diffraction(XRD) .Results showed that the uniform corrosion rate of the coupons at the gas tree was 0.0035 mm/a,the corrosion degree was slight,and no obvious local corrosion tendency was observed.The uniform corrosion rate of the low-lying coupon was 0.0599 mm/a,the local corrosion rate was 0.1380 mm/a,the pitting corrosion coefficient was 2.3,and the degree of localized corrosion was severe.The structure of the corrosion products on the surface of the low-lying pipe samples was loose,and the corrosion products were mainly composed of FeCO3,FeS and Fe2O3 .It was speculated that the corrosion was mainly caused by the corrosive gases CO2 and H2S,with Cl-in the effluent playing an accelerating role. |
| Author | 彭思洲 刘诗桃 万伟 韩杰林 梁光川 周军 刘岳龙 |
| AuthorAffiliation | 西南石油大学石油与天然气工程学院,四川 成都 610500%中国石化华北油气分公司石油工程技术研究院,河南 郑州 457001%中国石化华北油气分公司采气一厂,陕西 榆林 719000 |
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| Author_FL | ZHOU Jun LIU Yuelong PENG Sizhou LIANG Guangchuan WAN Wei HAN Jielin LIU Shitao |
| Author_FL_xml | – sequence: 1 fullname: LIU Shitao – sequence: 2 fullname: ZHOU Jun – sequence: 3 fullname: LIU Yuelong – sequence: 4 fullname: HAN Jielin – sequence: 5 fullname: PENG Sizhou – sequence: 6 fullname: WAN Wei – sequence: 7 fullname: LIANG Guangchuan |
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| ClassificationCodes | TG172.3 |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DOI | 10.16577/j.issn.1001-1560.2024.0185 |
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| DocumentTitle_FL | Study on the Corrosion Mechanism of Low-Lying Area of Gathering Pipeline in Daniudi Gas Field |
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| Keywords | 表面分析 surface analysis pipeline effusion distribution 腐蚀机理 管道内腐蚀 管道积液分布 pipeline internal corrosion corrosion mechanism |
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| Publisher | 西南石油大学石油与天然气工程学院,四川 成都 610500%中国石化华北油气分公司石油工程技术研究院,河南 郑州 457001%中国石化华北油气分公司采气一厂,陕西 榆林 719000 |
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| Snippet | TG172.3; 为了研究大牛地气田集输管道低洼处腐蚀机理,通过模拟管道沿线积液分布,确定距起点1207... |
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| Title | 大牛地气田集输管道低洼处腐蚀机理研究 |
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