影响鞍钢X70管线钢CO2腐蚀行为的环境因素和材料因素
CO2 Corrosion Behavoir of X70 Pipeline Steel
摘 要
利用失重法、扫描电镜等,研究了X70管线钢在CO2分压为2MPa的NACE溶液中高温高压环境下的腐蚀行为,结果表明,温度和Cl-是影响X70钢腐蚀的主要环境因素,随温度的升高均匀腐蚀速率增大.钢中珠光体、粒状贝氏体组织及非金属夹杂物MnS、CaS等在腐蚀环境中促进了管线钢的腐蚀.因此在材料方面要降低珠光体及粒状贝氏体含量,细化夹杂物,并降低夹杂物级别.
CO2腐蚀
珠光体
非金属夹杂物
pipeline steel
CO2 corrosion
perlite
non-metallic inclusion
Abstract
Corrosion behavior of X70 pipeline steel in NACE solution saturated with carbon dioxide with a partial pressure of 2MPa in a high-temperature and high-pressure environment was investigated.The major environmental factor a affecting the X70 pipeline steel carbon dioxide corrosion were temperature and Cl- content.The perlite ,granular bainite and non-metallic inclusions,such as MnS,CaS would accelerate corrosion.So it was necessary to reduce the content of perlite and granular bainite,and to refine and downgrade the non-metallic inclusions.
中图分类号 TG174.4
所属栏目 试验研究
基金项目
收稿日期 2007/7/9
修改稿日期
网络出版日期
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引用该论文: ZHANG Wei-wei,CAI Qing-wu,WU Hui-bin,REN Yi. CO2 Corrosion Behavoir of X70 Pipeline Steel[J]. Corrosion & Protection, 2008, 29(7): 368～371
被引情况:
【1】刘倩倩,李自力,程远鹏, "正交试验法研究X90管线钢在CO2环境中的腐蚀行为",腐蚀与防护 37, 970-972(2016)
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参考文献
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【3】周琦,何力力,黄淑菊.X70钢在不同温度下的CO2腐蚀行为[J].石油机械,2005,33(11):7-10.
【4】Mishra B,AL-Hassan S,Olson D L,et al.Development of a predictive model for activation-controlled corrosion of steel in solutions containing carbon dioxide[J].Corrosion,1997,53(11):852-859.
【5】Hara T,Asahi H,Kawakami A.Effect of alloying elements on carbon dioxide corrosion in 13% to 20% chromium-containing steels[J].Corrosion,2000,56 (4):419-428.
【6】Schmitt G.Understanding localized CO2 corrosion of carbon steel from physical properties of iron carbon-ate scales[J].Corrosion,1999,55(2):38.
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【8】刘守平,周上祺,等.非金属夹杂物对天然气油井用35CrMo钢耐蚀性的影响[J].特殊钢,2003,24(4):26-28.
【9】Wang J M,Chen X Q,Li G M.Suscep tibility of two types of low-alloy hull steels to pit initiation[J].Journal of University of Science and Technology Beijing,2004(6):555-560.
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