Abstract: Corrosion fatigue specimen with different surfaces (technical surfaces after machining and polished surfaces) of high alloyed martensitic stainless steel X46Cr13 (1.4043) and duplex stainless steel X2CrNiMoN22-3-2 (1.4462) were compared at load amplitudes from 175 MPa to 325 MPa in the geothermal brine of the Northern German Basin at 98 °C. Surface corrosion layers and pits reveal carbonate corrosion products on the surface such as FeCO₃ and FeOOH as the main precipitation phases with no dependence on the original surface roughness. At high stress amplitudes above 275 MPa technical surfaces (P50% at s_a 300 MPa=5×10⁵) resulted in more cycles to failure than polished (P50% at s_a 300 MPa=1.5×10⁵). The greater slope coefficient for technical surfaces k = 19.006 compared to polished surfaces k=8.78 demonstrates earlier failure at given stress amplitude s_a.
 
Key words: corrosion, CCS, carbon storage, aquifer, heat treatment, high alloyed steel.

Cite: Anja Pfennig, Marcus Wolf, Axel Kranzmann, "The Role of Surface Texture on the Corrosion Fatigue Behavior of High Alloyed Stainless Steel Exposed to Saline Aquifer Water Environment," International Journal of Materials Science and Engineering, Vol. 7, No. 2, pp. 26-33, June 2019. doi: 10.17706/ijmse.2019.7.2.26-33