针对输送典型酸性天然气（CO₂-H₂S-H₂O共存）管道的腐蚀问题，通过模拟试验，研究了CO₂分压、介质流速和H₂S含量对16Mn钢冲刷腐蚀行为的影响规律。结果表明：H₂S会加剧腐蚀，且随其含量增加腐蚀大幅增加，当H₂S体积分数≥5%时，16Mn钢的腐蚀速率是不含H₂S时的10倍以上；当CO₂分压为0.2 MPa时，临界流速为10 m/s，若大于临界流速，16Mn钢表面会出现点蚀，腐蚀程度大幅增加。

Aiming at the corrosion of pipelines which transport typical sour natural gas (CO₂-H₂S-H₂O coexistence), the influence of CO₂ partial pressure, medium flow rate and H₂S content on the erosion and corrosion behavior of 16Mn steel was studied by simulation experiments. The results showed that H₂S would intensify corrosion, and the corrosion would increase greatly with the increase of its content. When the volume fraction of H₂S was ≥ 5%, the corrosion rate of 16Mn steel was more than 10 times that without H₂S. When the CO₂ partial pressure was 0.2 MPa, the critical flow rate was 10m/s. If flow rate was greater than the critical value, pitting would occur on the surface of 16Mn steel, and the degree of corrosion would increase significantly.