乙二醇对海底管道CO2腐蚀的抑制作用
Inhibition Effect of Monoethylene Glycol on CO2 Corrosion of Carbon Steel Subsea Pipeline
摘 要
海上凝析气田开发普遍采用加注乙二醇(MEG)的方法保护海底湿气管道, 抑制水合物形成, 对管道内腐蚀也有一定的影响。本工作采用高温高压釜和电化学方法研究了乙二醇对海底管道内部CO2腐蚀的影响, 结果表明, 乙二醇对CO2均匀腐蚀具有显著抑制作用, 抑制效果与国外的经验公式预测结果接近。乙二醇对管道内腐蚀起抑制作用的主要原因可能与降低水的活性、降低FeCO3的溶解性、促进生成腐蚀产物膜等因素有关。
碳钢
海底管道
CO2腐蚀
monoethylene glycol (MEG)
carbon steel
subsea pipeline
CO2 corrosion
Abstract
In subsea condensate gas field production, monoethylene glycol (MEG) is often injected to prevent the formation of hydrates in the subsea pipeline, and the MEG affects the internal corrosion of the pipeline to some degree. The effect of MEG on internal corrosion of pipeline in CO2 environment was studied using autoclave testing and electro chemical techniques. The results showed that MEG reduced the general corrosion rate in CO2 environment. The effect was agreed with the predicted result of the empirical formula which was proposed by De Waard et al. The inhibited effect of MEG on internal corrosion would be related to decreasing the activity of water and solubility of FeCO3, which promoted the formation of corrosion product scale.
中图分类号 TG174
所属栏目 试验研究
基金项目 国家科技重大专项(2011ZX05026)资助
收稿日期 2011/11/9
修改稿日期
网络出版日期
作者单位点击查看
备注胡丽华,工程师,博士,
引用该论文: HU Li-hua,CHANG Wei,LU Min-xu,ZHANG Lei,XU Li-ning,LI Shao-fei. Inhibition Effect of Monoethylene Glycol on CO2 Corrosion of Carbon Steel Subsea Pipeline[J]. Corrosion & Protection, 2012, 33(6): 463
被引情况:
【1】范金龙,龚敏,侯肖,李兴强,罗焱桄,康波,孙伟,郭美波,梁贤忠, "3A21铝合金在乙二醇水溶液中的腐蚀行为",腐蚀与防护 35, 1116-1121(2014)
【2】张可桂,杨文忠,徐斌,刘瑛,尹晓爽, "1-乙氨基-2-三氯甲基-咪唑啉的制备及其缓蚀性能",腐蚀与防护 36, 122-127(2015)
【3】邓祖宇,何晓英, "硫脲对X70钢在含H2S薄层液膜下的缓蚀性能",腐蚀与防护 35, 706-710(2014)
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参考文献
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【2】Gonzfilez J J,Afonso M E,Pellegrino G. Corrosion of carbon steel in monoethylene glycol[C]//NACE Conference.Houston:2000,Paper No.498.
【3】张海燕,宁英男,孙开友,等. 天然气乙二醇脱水系统监测分析与防腐蚀方案[J]. 腐蚀与防护,2005,26(12):518-520.
【4】Skar J I,Halvorsen A M K. Corrosion control in the VEGA gas-condensate pipeline[C]//NACE Conference.Houston:2010,Paper No.327.
【5】路民旭,白真权,赵新伟,等. 油气采集储运中的腐蚀现状及典型案例[J]. 腐蚀与防护,2002,23(3):105-113.
【6】Seiersten M,Brendsdal E,Deshmukh S,et al. Development of a simulator for ethylene glycol loops based on solution thermodynamics and particle formation kinetics[C]//NACE Conference.Houston:2010,Paper No.131.
【7】蒋秀,屈定荣,刘小辉. 湿气管线的顶部腐蚀研究概况[J]. 腐蚀与防护,2011,32(2):86-90.
【8】Gulbrandsen E,Morard J H. Why does glycol inhibit CO2 corrosion[C]//NACE Conference.Houston:1998,Paper No.221.
【9】Smith L,de Waard K. Corrosion prediction and materials selection for oil and gas producing environments[C]//NACE Conference.Houston:2005,Paper No.648.
【10】朱光辉,苏振兴. 东方终端脱CO2系统装置腐蚀特征与分析[J]. 腐蚀与防护,2011,32(10):830-832.
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