某输气管线穿孔原因分析
Reasons Analysis on Perforation of a Gas Transportation Pipeline
摘 要
某输送未经处理的天然气管线发生穿孔泄漏。通过宏观分析、扫描电镜及能谱分析、X射线衍射分析等方法确定了其穿孔原因。结果表明: 造成该处发生局部腐蚀穿孔的主要原因是砂石沉积在输气管线底部, 并吸附聚集天然气中的产出水, H2S溶解在聚集的产出水中引起湿环境下的H2S腐蚀;该处腐蚀产物和泥沙形成的积垢与产出水中的Cl-对管壁局部腐蚀起到了促进作用。
穿孔
泄漏
H2S腐蚀
局部腐蚀
gas pipeline
perforation
leakage
H2S corrosion
local corrosion
Abstract
Perforation leakage happened to an untreated gas transportation pipeline. By means of macro analysis, SEM and EDS analysis, and XRD analysis, the perforation reasons were determined. The results show that the sand depositing at the bottom of the gas transportation pipeline would adsorb and aggregate the produced water in the gas, and H2S dissolved in the produced water and induced H2S corrosion in wet environment, which was main reason for the perforation. The fouling scale composed of corrosion products and sand and Cl- in the produced water, also promoted local corrosion of the pipeline.
中图分类号 TG142.4 DOI 10.11973/lhjy-wl201608017
所属栏目 质量控制与失效分析
基金项目
收稿日期 2016/6/7
修改稿日期
网络出版日期
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备注赵向杰(1987-), 男, 硕士, 主要从事材料的腐蚀与防护研究工作
引用该论文: ZHAO Xiang-jie,WANG Wen-dong. Reasons Analysis on Perforation of a Gas Transportation Pipeline[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2016, 52(8): 584～588
赵向杰,王温栋. 某输气管线穿孔原因分析[J]. 理化检验－物理分册, 2016, 52(8): 584～588
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参考文献
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【2】孙蕊,张钧,王温栋.N80油管断裂分析［J］.理化检验-物理分册,2014,50(11): 860-862.
【3】吕建华,关小军,徐洪庆,等.影响低合金钢材抗H2S腐蚀的因素［J］.腐蚀科学与防护技术,2006,18(2): 118-121.
【4】王莉.浅谈H2S气体对井下测试工具的腐蚀特性及对策［J］.油气井测试,2004,13(5): 63-65.
【5】《油气田腐蚀与防护技术手册》编委会.油气田腐蚀与防护技术手册: 下册［M］.北京: 石油工业出版社,1999.
【6】NESIC S, POSTLETHWAITE J, OLSEN S.An electrochemical model for prediction of corrosion of mild steel in aqueous carbon dioxide solutions［J］.Corrosion,1996,52(4): 280-294.
【7】KIMURA M, TOTSUKA N, KURISU T, et al. Sulfide stress corrosion cracking of line pipe［J］.Corrosion,1989,45(4): 340-346.
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