模拟塔里木油田环境中低Cr钢的H2S/CO2腐蚀行为
H2S/CO2 Corrosion Behavior of Low-Cr Steel in Simulated Tarim Oilfield Environments
摘 要
通过高温高压腐蚀试验,运用SEM、XRD、EDS等分析技术,研究了普通P110与3Cr110钢在模拟塔里木油田现场环境中的CO2/H2S腐蚀特征.结果表明:在模拟CO2腐蚀环境中,这两种材料的腐蚀产物为FeCO3,3Cr110表现出良好的抗CO2均匀腐蚀及局部腐蚀能力,其平均腐蚀速率显著小于普通P110；模拟CO2/H2S腐蚀条件下,两种材料的均匀腐蚀速率远小于单独CO2腐蚀环境下的均匀腐蚀速率,表面腐蚀产物为FeS,H2S腐蚀占主导作用；Cr元素在低Cr钢腐蚀产物膜中的富集,其腐蚀产物Cr(OH)3改善了腐蚀产物膜的稳定性,显著提高了低Cr钢的抗均匀腐蚀及局部腐蚀能力.
CO2/H2S腐蚀
均匀腐蚀
局部腐蚀
low-Cr steel
H2S/CO2 corrosion
uniform corrosion
local corrosion
Abstract
The CO2/H2S corrosion behavior of two carbon steels,common P110 and low-Cr 3Cr110 in the simulated environment simulating Tarim Oilfield, was studied by means of high temperature and high pressure corrosion tests,SEM,XRD and EDS.The results show that the corrosion products of 3Cr110 and P110 were identified as FeCO3 in CO2 corrosion environment,and the uniform corrosion rate of 3Cr110 was much less than that of common P110.In the simulated CO2/H2S environment,the corrosion product was FeS,and H2S corrosion predominated in the corrosion course.The uniform corrosion rates of the two materials were much less than those in CO2 environment.The enrichment of Cr in the corrosion scale on the low Cr steel improved the protection of corrosion scale,which enhanced the resistance of 3Cr110 to uniform and local corrosion.
中图分类号 TG172.8
所属栏目 试验研究
基金项目 2008年新世纪优秀人才支持计划资助项目(NCET-07-0686)
收稿日期 2008/8/26
修改稿日期 2008/10/20
网络出版日期
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引用该论文: YU Shao-bo,ZHAO Guo-xian,HAN Yong. H2S/CO2 Corrosion Behavior of Low-Cr Steel in Simulated Tarim Oilfield Environments[J]. Corrosion & Protection, 2009, 30(5): 289～292
被引情况:
【1】李宁, "天然气管道内腐蚀的原理及直接评价",腐蚀与防护 34, 362-366(2013)
【2】胡金东,刘希琴,刘子利,王帅鹏,田青超,王怀忠, "铬含量对薄壁高强度桩管钢腐蚀性能的影响",腐蚀与防护 35, 1027-1032(2014)
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参考文献
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【2】李萍.90℃时油管钢P110的H2S/CO2腐蚀行为[J].全面腐蚀控制,2006,20(2).
【3】Chen C F.Effect of chromium on the pitting resistance of oil tube steel in a carbon dioxide corrosion system corrosion[J].Corrosion,2005,61:594-601.
【4】Trasatti S,Scoppio L.H2S and CO2 Corrosion of Some 9Cr-1Mo Alloys foe Downhole Application[C]//Corrosion/2001,Houston:NACE,2001:83.
【5】Sun W,Nesic S.Kinetics of Iron Sulfide and Mixed Iron Sulfide/Carbonate Scale Precipitation in CO2/H2S Corrosion[C].Corrosion/2006,Houston:NACE,2006:644.
【6】Iofa Z A,Batrakov V V.Influence of anion adsorption on the action of inhibitors on the acid corrosion of iron and cobalt[J].Electrochim Acta,1964,9:1645-1650.
【7】Shoesmith D W,Taylor P,Bailey M G.Electrochemical behavior of iron in alkaline sulphide solutions[J].Electrochim Acta,1978,23:903-908.
【8】Schmitt G.CO2 Corrosion of steels-An attempt to range parameter and their effects[C]//Corrosion/83,Houston:NACE,1983.
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