低合金高强度油管应力导向氢致开裂腐蚀失效分析
SOHIC Corrosion Failure Mechanism of High Strength Low Alloy Oil Pipeline
摘 要
对肯基亚克(Kenneyak)油田油管腐蚀情况进行了调查研究,对其油管和接箍腐蚀形态进行了分析,结合油管理化性能和腐蚀形貌表面物理分析,对铬-钼系低合金高强度钢油管腐蚀机理进行了深入的研究.结果表明,油管接箍外壁腐蚀是由于环境氢损伤引起的,主要是H2S腐蚀,包括环境剥蚀和内部氢致开裂(HIC)；断裂是由于应力导向氢致开裂,即SOHIC所致.同时认为硬度小于HRC22的SM90SS这类低合金高强度抗硫钢油管也倾向于发生应力导向氢致开裂.分析结果对于防止油管腐蚀穿孔和/或开裂、保护油井安全具有实用价值.
腐蚀失效
应力导向氢致开裂(SOHIC)
低合金高强度钢
oil pipeline coupling
corrosion failure
stress oriented hydrogen induced cracking (SOHIC)
high strength low alloy (HSLA) steel
Abstract
Investigation had been carried out on oil pipeline corrosion in Kenneyak Oilfield.Based on macro and micro corrosion morphology analysis,material mechanical property tests and chemical composition analysis,it is showed that the corrosion on the coupling external wall was induced by environmental hydrogen damage in which H2S corrosion is dominating,including exfoliation corrosion,internal hydrogen induced cracking (HIC) and stress oriented hydrogen induced cracking (SOHIC) resulted in fracture.The pipeline made up of high strength low alloy (HSLA) steels like SM90SS with hardness less than HRC22 tends to SOHIC in sour service environment.The results may help to prevent pipeline from corrosion perforation and/or cracking,and keep the safety of oil well.
中图分类号 TG172
所属栏目 腐蚀失效分析
基金项目
收稿日期 2009/9/24
修改稿日期 2010/2/2
网络出版日期
作者单位点击查看
备注吕拴录,教授.
引用该论文: YUAN Peng-bin,GUO Sheng-wu,LU Shuan-lu. SOHIC Corrosion Failure Mechanism of High Strength Low Alloy Oil Pipeline[J]. Corrosion & Protection, 2010, 31(5): 407～410
被引情况:
【1】吕拴录,宋文文,杨向同,彭建新,韩勇,赵国仙,吕祥鸿,郭振东,闻亚星,朱亮亮, "某井S13Cr特殊螺纹接头油管柱腐蚀原因",腐蚀与防护 36, 76-80(2015)
【2】杨明,马晓勇,龙云,赵大伟,张晓雷,陈武, "碳钢在湿硫化氢环境中的应力导向氢致开裂行为",腐蚀与防护 35, 1226-1229(2014)
【3】杨相同,吕拴录,柳栋,康延军,刘洪涛,刘军严,钟家维,徐东启,刘慧荣,杨曦, "某井修井遇阻及油管和套管失效原因分析",理化检验－物理分册 51, 147-150(2015)
【4】杨明,马晓勇,龙云,赵大伟,张晓雷,陈武, "碳钢在湿硫化氢环境中的应力导向氢致开裂行为",腐蚀与防护 35, 1226-1229(2014)
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参考文献
【1】吕拴录,相建民,常泽亮,等.牙哈301井油管腐蚀原因分析[J].腐蚀与防护,2008,29(11):706-709.
【2】郭生武,袁鹏斌.油田腐蚀形态导论[M].北京:石油工业出版社,2009.
【2】郭生武,袁鹏斌.油田腐蚀形态导论[M].北京:石油工业出版社,2009.
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