39830 2017 eng Paper 8825, 1 11 conferenceobject NACE Houston TX, USA NACE 0 -- -- -- Super-austenitic stainless steels cover grades with high chromium (20 to 27 %), high nickel (18 to 31 %) and high molybdenum (4 to 6 %) contents. Within this family, the 6%Mo high nitrogen grade S31266 was developed to combine the beneficial influence of chromium, tungsten, molybdenum and nitrogen on its mechanical and corrosion properties. Due to 22 % nickel, 24 % chromium and 0.4 % nitrogen additions, this alloy exhibits a very stable microstructure, being less prone to intermetallic phase precipitation than the other highly alloyed super-austenitic stainless steels. This paper deals with the corrosion resistance of S31266 in artificial geothermal water with moderate salinity and low pH. Long-term static exposures and electrochemical tests were conducted at various temperatures to evaluate the pitting, crevice and stress corrosion cracking resistance of this material. The results show that S31266 is resistant up to 220 °C. As a consequence, it can be a good candidate material for geothermal applications involving a highly corrosive environment, especially salinity and low pH. Proceedings NACE International Corrosion Conference NACE International Corrosion Conference 2107 New Orleans LA, USA 26.03.2017 30.03.2017 Joana Sobetzki S. Le Manchet Ralph Bäßler eng uncontrolled Geothermal energy eng uncontrolled S31266 eng uncontrolled Crevice corrosion eng uncontrolled Super-austenitic stainless steel Ingenieurwissenschaften und zugeordnete Tätigkeiten Angewandte Physik Datei im Netzwerk der BAM verfügbar ("Closed Access") Graue Literatur