ABSTRACT The hydrogen permeation behaviour of X80 pipeline steel exposed to corrosion environments with different H2S/CO2 partial pressure ratios at room temperature was investigated through the high-pressure electrochemical hydrogen permeation test. Both CO2 and H2S have a hydrogen permeation promoting effect; however, CO2 hydrogen permeation promoting effect is much weaker than H2S. The hydrogen permeation curves have the rising, falling then stable stage. When at a total pressure of 1 MPa, as the H2S partial pressure decreases, the hydrogen permeation promoting effect weakens, but the peak current of hydrogen permeation gradually increases. The main reason is that the role of corrosion products has changed from promoting hydrogen permeation to hindering hydrogen permeation during the reaction.

中文翻译：

---

腐蚀膜与H2S/CO2分压比相互作用对X80管线钢氢渗透的影响

摘要 通过高压电化学透氢试验研究了X80管线钢在室温下暴露于不同H2S/CO2分压比腐蚀环境下的透氢行为。CO2和H2S都有促进氢渗透作用；但是，CO2 的氢渗透促进作用比 H2S 弱得多。氢渗透曲线有上升、下降和稳定阶段。当总压力为 1 MPa 时，随着 H2S 分压的降低，氢渗透促进作用减弱，但氢渗透峰值电流逐渐增大。主要原因是腐蚀产物在反应过程中的作用由促进氢渗透转变为阻碍氢渗透。