A Novel Martensitic Stainless Steel Material for CO2 Corrosion Environment

The novel martensitic stainless steel 13CrU was developed based on 13CrS by adding trace alloying elements, such as Mo, Ni, and Ta. This study compares the mechanical and corrosion resistance properties of the two martensitic stainless steels to assess the effect of these alloying elements on 13CrU’s performance. Experimental results show that increasing Mo by 0.67 wt% and Ni by 1.13 wt% improves the yield strength of 13CrU by 11.6% compared to 13CrS. The addition of Ta enhances the corrosion resistance of 13CrU beyond that of 13CrS. Overall, the addition of trace alloying elements significantly improves the mechanical properties of 13CrU and enhances its resistance to CO₂ corrosion.