STRESS-CORROSION CRACKING OF SENSITIZED TYPE-304-STAINLESS-STEEL IN DOPED HIGH-TEMPERATURE WATER

The susceptibility to stress corrosion cracking (SCC) of a sensitized, wrought type 304 (UNS S30400) stainless steel (SS) was assessed using the slow strain rate test (SSRT) technique under applied potential co ntrol, Data was obtained in lithium hydroxide (LiOH)-doped water with the addition of sulfate (SO42-) and/or chloride (Cl-) ions. Tests were performed over the temperature range from 50 degrees C to 250 degrees C, Intergranular SCC (IGSCC) was observed at temperatures from 150 de grees C to 250 degrees C. The effects of SO42- and Cl- on the critical potential for IGSCC varied with temperature. Results were compared wi th literature data for IGSCC in pure water and in water containing oth er concentrations of dopants.