Effects of Dissolved Oxygen,Chloride and Treatment on Stress Corrosion Behavior of 316L SS in High Temperature Pure Water

The effects of DO,Cl- and treatment on the SCC behavior of 316L SS were srudied by SSRT in high temperature (325 ℃) and high pressure (15.5 MPa) environments and the fracture morphology of specimens after testing was observed carefully.The results showed that both cold worked and solution treated 316L SS had SCC susceptibility in high temperature water environments containing 0 μg/kg DO+0 μg/kg Cl-,200 μg/kg DO+0 μg/kg Cl-,0 μg/kg DO+30 μg/kg Cl- or 200 μg/kg DO+30 μg/kg Cl-.And the effect of 200 μg/kg DO and 30 μg/kg Cl- on SCC susceptibility was very remarkable.Although cold work could enhance the yield strength of 316L SS,it increased the SCC susceptibility of 316L SS.