饱和CO2盐溶液中镍基合金和碳钢的电偶腐蚀行为
Galvanic Corrosion Behaviors of Inconel 718-P110SS Couple in Brine Saturated with CO2
摘 要
在油田中管材应用种类繁多,难免存在不同材料的耦接使用.应用电化学法和溶液浸泡方法研究了P110SS-Inconel 718两种材料耦接的电偶对在含高Cl-的饱和CO2溶液中的电偶腐蚀行为,用扫描电镜(SEM)观察电偶对材料浸泡后的腐蚀形貌.结果表明:在Cl-浓度不变的情况下,随着溶液介质温度的升高,两种材料的自腐蚀电位均有不同程度的降低;耦接后,电偶对的电偶电流密度随着温度的升高而增大,表面腐蚀坑明显增深.浸泡试验表明:耦接后作为阳极的 P110SS的腐蚀程度相比单独浸泡时加剧.
自腐蚀电位
腐蚀速率
galvanic corrosion
free corrosion potential
corrosion rate
Abstract
The variety of tubular goods are various in oil fields,so the connection of different mateials is inevitabe in working.Galvanic corrosion behaviors of Inconel 718-P110SS in brine saturated with CO2 were studied by potentiodynamic polarization curves,galvanic method and immersion test.The surface corrosion morphology of the couple samples was observed by means of SEM.The results showed that the free corrosion potential of two samples decreased,and the couple current density increases with the rise of solution temperature when the concentration of Cl- was invariable.The corrosion rate of P110SS increased obviously under coupling condition.
中图分类号 TG172.2
所属栏目 试验研究
基金项目
收稿日期 2008/7/3
修改稿日期 2008/9/28
网络出版日期
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联系人作者赵雪会(zhaoxh@tgrc.org)
备注赵雪会,工程师.
引用该论文: ZHAO Xue-Hui,TIAN Wei,BAI Zhen-quan,WEI Bin. Galvanic Corrosion Behaviors of Inconel 718-P110SS Couple in Brine Saturated with CO2[J]. Corrosion & Protection, 2009, 30(7): 484～487
被引情况:
【1】任呈强,鲍明昱,王万国,曾德智,施太和, "含CO2和H2S地层水中17-4不锈钢与C110钢间的电偶腐蚀",机械工程材料 39, 6-9(2015)
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参考文献
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【3】张忠铧,黄子阳,孙元宁,等.3Cr抗CO2和H2S腐蚀系列油套管开发[J].宝钢技术,2006(3):5-8.
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【5】M E El-Dahshan,A M Shams El Din,H H Haggag.Galvanic corrosion in the systems titanium/316 L stainless steel/ Al brass in Arabian Gulf water[J].Desalination,2002,142:61-169.
【6】黄桂桥,郁春娟,李兰生.海水中钢的电偶腐蚀研究[J].中国腐蚀与防护学报,2001,21(1):46-52.
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【8】R M Moreira,C V Franco,C J B M Joia,et al.The effects of temperature and hydrodynamics on the CO2 corrosion of 13Cr and 13Cr5Ni2Mo stainless steels in the presence of free acetic acid[J].Corrosion Science,2004,46:2987-3003.
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