南海某油田海管旁路腐蚀原因分析  

Analysis of Corrosion Causes of Submarine Pipeline Bypass in an Oilfield in South China Sea

作　　者：李强 徐琳 孙郭锋 岳宗领 杨森 Li Qiang;Xu Lin;Sun Guofeng;Yue Zongling;Yang Sen(CNOOC Limited Shenzhen LF Oilfied Operations,Shenzhen,Guangdong 518067,China;CNOOC Changzhou Paint and Coating Industry Research Institute Co.,Ltd.,Changzhou,Jiangsu 213016,China;CNOOC Safety&Technology Service Co.,Ltd.,Shenzhen Branch,Shenzhen,Guandong 518067,China;CNOOC Oil Energy Development Co.,Ltd.,Zhanjiang Oil Production Serveces Wenchang Co.,Zhanjiang,Guangdong 524057,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司陆丰油田作业区,广东深圳518067 [2]中海油常州涂料化工研究院有限公司,江苏常州213016 [3]中海油安全技术服务有限公司深圳分公司,广东深圳518067 [4]中海石油能源发展股份有限公司湛江采油服务文昌分公司,广东湛江524057

出　　处：《涂层与防护》2023年第4期9-12,共4页Coating and Protection

摘　　要：通过现场挂片腐蚀及宏观形貌分析、旁路短节内壁宏观形貌分析、旁路腐蚀产物分析等手段,分析海管旁路腐蚀原因。结果表明,结合挂片情况和海管旁路短节拆出情况,管道油泥淤积是腐蚀速率升高的主要因素,在油泥淤积部位,缓蚀剂和杀菌剂无法发挥保护管道效果,细菌滋生和环境的相对稳定,进一步加剧了腐蚀。建议加强控制沉积物淤积量及淤积时间,避免因长期淤积产生严重坑蚀。The causes of submarine pipeline spool corrosion were analyzed by means of on-site coupon corrosion and macro morphology analysis,macro morphology analysis of the inner wall of spool pieces,and analysis of spool corrosion products.The results show that,in combination with the hanging piece condition and the removal of subsea pipeline spool pieces,the sludge deposition of the pipeline is the main factor for the increase of the corrosion rate.At the sludge deposition position,corrosion inhibitors and bactericides can not play a role in protecting the pipeline.The bacterial breeding and the relatively stable environment further aggravate the corrosion.It is suggested to strengthen the control of sediment deposition amount and time to avoid serious pit erosion caused by long-term deposition.

关 键 词：宏观形貌 旁路短节 腐蚀产物 坑蚀 

分 类 号：TQ639[化学工程—精细化工]