摘要
近年来,国内多家石化企业的延迟焦化装置转油线钢制密封圈在投用较短的时间内相继发生断裂失效。对密封圈进行失效分析,结果表明:奥氏体不锈钢密封圈出现失效的主要原因是发生连多硫酸应力腐蚀开裂。建议选用马氏体型不锈钢0Cr13作为密封圈的材料,可有效避免其发生连多硫酸应力腐蚀开裂。
In recent years,the steel sealing ring of delayed coker transfer lines in many domestic petrochemical enterprises failed after usage for a short period of time.The failure analysis results of the sealing ring showed that the main cause of failure of the austenitic stainless steel sealing ring was the occurrence of polythionic acid stress corrosion cracking(PASCC).It was recommended to use martensitic stainless steel 0 Cr13 as the material of the sealing ring,which could effectively avoid the occurrence of PASCC in the sealing ring.
作者
宋利滨
李志峰
张宝坤
SONG Libin;LI Zhifeng;ZHANG Baokun(China Special Equipment Inspection and Research Institute,Beijing 100029,China;PetroChina Jinzhou Petrochemical Company,Jinzhou 121000,China)
出处
《腐蚀与防护》
CAS
北大核心
2019年第3期220-223,共4页
Corrosion & Protection
关键词
密封圈
失效分析
敏化
连多硫酸应力腐蚀开裂
sealing ring
failure analysis
sensitization
polythionic acid stress corrosion cracking (PASCC)
