机电工程技术2024，Vol.53Issue(6)：305-308,4.DOI:10.3969/j.issn.1009-9492.2024.06.071
顺丁橡胶装置溶剂管线腐蚀泄漏原因分析及防腐对策
Analysis of the Causes of Corrosion and Leakage of Solvent Pipeline and Corrosion Countermeasures of Cis-Butadiene Rubber Plant
摘要
Abstract
Corrosion perforation is found in the solvent line of a petrochemical company's cis-butadiene rubber plant.In order to find the root cause of the pipe failure,the corroded pipe is sampled,inspected,and analyzed by macro inspection,chemical composition analysis,hardness measurement,metallurgical organization analysis,microscopic morphology analysis,and corrosion product energy spectrum analysis.The results show that the chemical composition,mechanical properties and metallographic organization of the pipe meet the requirements.However,the micro-morphological analysis showes that the corrosion area is selective corrosion along the crystal,and the energy spectrum results showes that the corrosion area contained a high amount of fluorine elements.Considering that the corrosion mainly occurs in the vicinity of the weld seam,the bumps and grooves of the weld seam will form eddy currents and low-pressure zones in the region,which will lead to the high concentration of hydrofluoric acid(HF)in the upper gas phase region in the pipeline,thus causing selective intergranular corrosion in the region of tissue changes in the pipe wall.Therefore,it can be judged that hydrofluoric acid(HF)corrosion is the root cause of corrosion perforation of solvent pipelines.Suggested measures in welding design,process operation and material upgrading are proposed for the causes of pipe failure to avoid and prevent similar failures and thus improve the safety of the equipment.关键词
HF/晶间腐蚀/腐蚀泄漏/失效分析/防腐对策Key words
HF/intergranular corrosion/corrosion leakage/failure analysis/corrosion protection measures分类
化学化工引用本文复制引用
段志宏,李伟明,关诗明..顺丁橡胶装置溶剂管线腐蚀泄漏原因分析及防腐对策[J].机电工程技术,2024,53(6):305-308,4.基金项目
广东省石化装备故障诊断重点实验室开放基金资助项目(702/91720214) （702/91720214）
