Cl^-浓度对油井管用钢湿H_2S腐蚀行为的影响  

Influence of chloride ion concentration on wet H_2S corrosion of oil well pipe steel

作　　者：艾芳芳[1] 徐小连[1] 陈义庆[1] 钟彬[1] 李琳[1] 高鹏[1] 

机构地区：[1]鞍钢股份有限公司技术中心,辽宁鞍山114009

出　　处：《金属热处理》2013年第4期28-31,共4页Heat Treatment of Metals

摘　　要：对油井管用钢进行了湿H2S环境中4种Cl-浓度应力环试验。结果表明:断裂试样的表面形貌可分为4部分,断口裂纹源、裂纹扩展区、瞬断区和滑移带。油井管用钢的断裂机理符合滑移-溶解-断裂理论。Cr和V在金属表面富集,形成的腐蚀产物膜起到了保护作用。在湿硫化氢环境中腐蚀溶液中Cl-浓度达到0.850 mol/L时,油井管用钢腐蚀最严重。Oil well pipe steel was tested in four chloride ion concentration medium for wet H2S corrosion. The results show that surface morphology of fracture sample can divide into fracture source, crack extended area, short interruption area and slip band. Fracture mechanism of oil well pipe steel conforms to sllp-meh-fracture theory.. Cr and V are enriched in the surface of the metal to form corrosion product film to protect tile matrix. Oil well pipe steel is eroded most seriously when chloride ion concentration is 0. 850 mol/L in wet H2S corrosion condition.

关 键 词：油井管用钢 Cl-浓度 应力腐蚀 硫化氢 

分 类 号：TG174[金属学及工艺—金属表面处理]