CO2 压力对含杂质超临界CO2 输送管线X65钢应力腐蚀开裂敏感性的影响

程璐瑶, 徐彦磊, 李家玮, 孙冲, 林学强, 孙建波

Effect of CO2 Pressure on Stress Corrosion Cracking Susceptibility of X65 Pipeline Steel Used for Transporting Impure Supercritical CO2

CHENG Luyao, XU Yanlei, LI Jiawei, SUN Chong, LIN Xueqiang, SUN Jianbo

表3 在不同CO2压力的含杂质超临界CO2环境中X65管线钢表面腐蚀膜的EIS拟合数据

Table 3 EIS fitting data of the corrosion film on X65 steel exposed to supercritical CO2 environment with impurities at different CO2 pressures

CO2 pressure / MPa Rs / Ω·cm2 Rct / Ω·cm2 Y0(Qdl) / Ω-1·cm-2·S n n(Qdl) 7.5 13.86 349.2 0.033 0.721 10 14.04 491.3 0.051 0.858 14 13.88 151.4 0.027 0.705