摘要
316L不锈钢液控管线在某油田注汽井服役过程中出现了多条裂纹,导致液压油渗漏。通过宏观检验、金相分析、成分分析、扫描电镜(SEM)观察及能谱分析(EDS)等检测方法对液控管线失效原因进行了分析。分析结果表明:316L不锈钢液控管线在高温(260℃)、高压(19.5 MPa)下工作,环境中存在氯离子和氧,在拉应力共同作用下发生了应力腐蚀开裂(SCC)。
A number of cracks appeared on 316L stainless steel hydraulic pipeline in service, leading to the leakage of hydraulic fluid. Failure causes of the pipeline were analyzed by means of macroscopic detection, metallographic analysis, composition analysis, SEM and EDS. The results show that the pipeline suffered from stress corrosion cracking （SCC） due to the interaction of chloride ions, oxygen ions and tensile stress under high temperature and high pressure （260 ℃, 19.5 MPa）.
出处
《石油化工腐蚀与防护》
CAS
2017年第6期41-44,共4页
Corrosion & Protection In Petrochemical Industry
基金
国家科技重大专项"大型油气田及煤层气开发"子课题"规模化多元热流体热采工程技术示范"(2016ZX05058-003-009)
