摘要
某石化公司制氢装置变换气分液罐底部出口管线弯头发生穿孔泄漏。为了找出其原因,对失效管线的腐蚀形貌、金相组织、腐蚀表面微观特征及腐蚀产物进行了分析,结果表明,出口管线弯头穿孔泄漏的主要因素是管线内酸性水(碳酸)的二氧化碳腐蚀和凝结水的流体冲刷作用;腐蚀和冲刷的交互作用加速了弯头管壁的减薄直至穿孔。提出了加强监控和管线材质升级等防控措施。
The elbow of outlet pipeline at the bottom of transformation gas separator tank in a hydrogen manufacturing unit was perforated and leaked.In order to find out the cause,comprehensive research was conducted on the failed pipeline by means of corrosion morphology analysis,metallographic structure analysis,corrosion surface micro-characteristics analysis and corrosion products analysis.The studies indicated that the leakages come from carbon dioxide corrosion of pipeline sour water(carbonic acid)and fluid scouring of condensate water;the interaction of corrosion and scouring accelerates the thinning of elbow until perforation.Solutions were proposed such as strengthening monitoring and upgrading pipeline materials.
作者
吴培毅
孙涛
高楠
WU Peiyi;SUN Tao;GAO Nan(CNOOC Huizhou Petrochemicals Company Limited,Huizhou 516086,China;Shenyang Zkwell Corrosion Control Technology Co.,Ltd.,Shenyang 110000,China)
出处
《石油化工腐蚀与防护》
CAS
2023年第2期54-56,60,共4页
Corrosion & Protection In Petrochemical Industry
关键词
制氢
酸性水
CO_(2)腐蚀
弯头
穿孔
hydrogen manufacturing
acid water
CO_(2)corrosion
elbow
perforation
