DETERMINATION OF INTERGRANULAR CORROSION SUSCEPTIBILITY OF Z3CN20.09M CAST DUPLEX STAINLESS STEEL BY A MODIFIED DOUBLE LOOP ELECTROCHEMICAL POTENTIOKINETIC REACTIVATION METHOD

摘要：

　　In this study,a modified double loop electrochemical potentiokinetic reactivation(DL-EPR)test was applied to determine the degree of intergranular corrosion(IGC)susceptibility of a Z3CN20.09M cast duplex stainless steel(CDSS)which has been used widely in primary coolant pipes of nuclear power plants.An optimized DL-EPR measurement was successfully used to characterize the interactions among precipitates,chromium depletion and IGC of steel Z3CN20.09M with high sensitivity.The experimental results showed that the degree of sensitization increased gradually from 1h to 50h due to the formation of chromium-depleted phase γ2 around the M23C6 and σ phases precipitated at the ferrite/austenite boundaries or in ferrite during aging.

关键词： Intergranular corrosion DL-EPR Secondary phases

作者: Y.Z.Shi B.Yang M.X.Zhang H.C.Wu S.L.Wang

作者单位: State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing No.30 Xueyuan Road Beijing,100083,China

会议类型: 国际会议

会议名称: Energy Materials 2014(第一届能源材料国际会议)

会议地点: 西安

会议语种:英文

页码: 557-562

在线出版日期: 2014-11-04（万方平台首次上网日期，不代表论文的发表时间）