正交试验研究离子浓度对CO2腐蚀的影响
Effect of Ion Concentration on CO2 Corrosion Evaluated by Orthogonal Experiment
摘 要
利用拉丁正交试验研究了在常温、常压下,不同浓度的六种常见离子对川西气田某气井N80钢CO2腐蚀的影响规律,结果显示:在CO2饱和的液相介质中,Ca2+和CO2-3对CO2腐蚀速率影响较大,其次是Fe2+,其他离子的影响程度较小.随着Cl-浓度的增加,腐蚀速率先增大后减小,但是变化幅度不是很大;随着Fe2+浓度的增大,介质的腐蚀速率降低;随着SO2-4和Mg2+浓度的增加,腐蚀速率增加,但是Mg2+的影响很小;随着Ca2+和CO2-3浓度的增加,腐蚀速率先减小后增大.
CO2腐蚀
离子
orthogonal experiment
CO2 corrosion
ion
Abstract
Orthogonality experiments were performed at normal temperature and pressure to investigate the influence of six kinds of ions with different concentrations on the corrosion behavior of N80 steel in a given corrosion medium.It was found that Ca2+ and CO2-3 in the liquid medium saturated with CO2 had great effect on the corrosion rate,the next was Fe2+,and other ions had little influence.With the increase of the concentration of Cl-,the corrosion rate increased firstly and then decreased,but the change was not obvious.With the increase of the concentration of Fe2+,the corrosion rate reduced.With increasing the concentration of SO2-4 and Mg2+,the corrosion rate increased,but Mg2+ had little influence.With the increase of the concentration of Ca2+ and CO2-3,the corrosion rate decreased first and then increased.
中图分类号 TG172.6
所属栏目 试验研究
基金项目 中国科学院知识创新工程重要方向项目(No.KZCX2-YW-210),国家科技支撑计划项目(2007BAB27B01)
收稿日期 2009/7/23
修改稿日期 2009/8/21
网络出版日期
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联系人作者李言涛(ytli98@163.com)
备注李言涛,副研究员.
引用该论文: LI Yan-tao,ZHANG Ling-ling,HOU Bao-rong. Effect of Ion Concentration on CO2 Corrosion Evaluated by Orthogonal Experiment[J]. Corrosion & Protection, 2010, 31(6): 434～435
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参考文献
【1】Schmitt G.CO2 Corrosion of steels-an attempt to range parameter and their effects[C]//Advances in CO2 Corrosion.Vol 1.Houston Texas:NACE,1984:1.
【2】Hansler H R.The mechanism of CO2 corrosion of steels in aqueous CO2 environments[C]//NACE Corrosion,Houston,USA:1985.
【3】Waard C De,Lotzu Milliams D E.Predictive model for CO2 corrosion in wet natural gas pipelines[J].Corrosion,1991,47(12):976-985.
【4】赵平,张学元.H2S腐蚀的控制[J].全面腐蚀控制,2002,16(5):4-10.
【2】Hansler H R.The mechanism of CO2 corrosion of steels in aqueous CO2 environments[C]//NACE Corrosion,Houston,USA:1985.
【3】Waard C De,Lotzu Milliams D E.Predictive model for CO2 corrosion in wet natural gas pipelines[J].Corrosion,1991,47(12):976-985.
【4】赵平,张学元.H2S腐蚀的控制[J].全面腐蚀控制,2002,16(5):4-10.
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