塔里木油田某联合站L245钢生产汇管腐蚀穿孔的原因分析

详细信息    查看全文 | 推荐本文 |

英文篇名：Causes Analysis of Corrosion and Perforation of Production Meeting Pipelines in a United Station in Tarim Oilfield 作者：刘小龙 ; 王忠 ; 崔小虎 英文作者：LIU Xiao-long;WANG Zhong;CUI Xiao-hu;Tarim Oilfield Company,China National Petroleum Corporation; 关键词：油田 ; 联合站 ; 生产汇管 ; L245钢 ; 腐蚀穿孔 ; 二氧化碳 ; 氯离子 ; 措施 英文关键词：oilfield;;united station;;production meeting pipelines;;L245 steel;;corrosion and perforation;;carbon dioxide;;chlorine ion;;measures 中文刊名：CLBH 英文刊名：Materials Protection 机构：中国石油天然气集团有限公司塔里木油田分公司; 出版日期：2019-01-15 出版单位：材料保护 年：2019 期：v.52;No.480 语种：中文; 页：CLBH201901028 页数：7 CN：01 ISSN：42-1215/TB 分类号：130-135+146

摘要

塔里木油田某联合站L245钢生产汇管在焊缝和弯管等部位频繁出现腐蚀穿孔现象。通过对穿孔管样壁厚测量、形貌观察、化学成分及金相组织结构、力学性能和物相等的分析,并结合现场运行工况,考察了其失效原因。结果显示:涂层失效露出金属本体后发生了CO_2腐蚀,在温度60℃高含氯离子情况下,加剧了腐蚀速率,是导致管线频繁穿孔的主要原因,并根据失效原因给出了针对性的建议措施。
        Corrosion and perforation frequently occurred in the weld joints and elbow sections of production pipelines in the Tarim Oilfield.Through the analysis of the wall thickness,morphology,chemical composition and metallographic structure of the perforated pipelines and the combination with the on-site operating conditions,the failure causes were investigated. Results showed that carbon dioxide corrosion occurred after the coating failure on the metal body. In the case of the temperature of 60 ℃ with high chloride ions,the corrosion rate increased,which was the main reason for the frequent perforation of the pipelines. Besides,the specific suggested measures were given out based on the failure causes.

引文

[1]DE WAARD C,LOTZ V,DUGSTAD A.Flow Velocity Effects on CO2Corrosion of Carbon Steel:Corrosion 1995[C].Houston:NACE International,1995:Paper No.128.
    [2]梁裕如,姬丙寅.某输油管道腐蚀泄漏失效原因分析[J].表面技术,2016(8):68-73
    [3]张忠铧,郭金宝.CO2对油气管材的腐蚀规律及国内外研究进展[J].宝钢技术,2000(4):54-58.
    [4]张学元,邸超,雷良才.二氧化碳腐蚀与控制[M].北京:化学工业出版社,2000:19-22.
    [5]HAUSLER R H,STEGMANN D W.CO2corrosion and its provention by chemical inhibition in oil and gas production:Corrosion 1988[C].Houston:NACE,1988:paper No.363.
    [6]方晓君,彭伟华,李建东,等.温度、流速及压力对原油腐蚀性的影响[J].腐蚀科学与防护技术,2014(5):431-435.
    [7]方智,吴萌顺,张琳,等.水化学因素对集输管线腐蚀的影响[J].北京科技大学学报,1996,10(18):27-31.
    [8]赵帅,兰伟.管道内防腐技术现状与研究进展[J].表面技术,2015,44(11):112-118.
    [9]杨双春,吴芳芳,张金辉,等.管道内防腐技术研究进展[J].当代化工,2012(11):1 242-1 245.
    [10]陈洪玉,刘兴,张立新.埋地煤气管道局部腐蚀原因分析[J].表面技术,2006,35(4):80-81.
    [11]熊娟,郑兴文,张文艳,等.西南地区某输油管道外腐蚀分析[J].表面技术,2014,43(4):59-63.
    [12]刘存贵,剧慧斌,张英杰.煤气管道局部腐蚀原因及应对措施[J].腐蚀与防护,2004(2):69-70.
    [13]朱明,余勇,张慧慧.L245钢在不同温度下的油气田模拟水中的腐蚀行为研究[J].中国腐蚀与防护学报,2017,37(6):300-304
    [14]赵景茂,顾明广,左禹.二氧化碳腐蚀的气液双相新型缓蚀剂的开发[J].腐蚀与防护,2005,26(10):436-454.