在模拟注气井筒高温高溶解氧含量腐蚀环境中对P110钢开展了腐蚀评价试验，并利用失重法测试腐蚀速率，结合腐蚀形态观察和腐蚀产物分析，研究了注气氧含量对P110钢在90℃时腐蚀行为的影响。结果表明：P110钢在不同注气氧含量条件下均呈现严重腐蚀结垢，腐蚀产物主要为铁的氧化物和CaCO₃，腐蚀形态主要为局部腐蚀；P110钢的腐蚀进程受阴极反应过程中溶解氧扩散速率控制，不同注气氧含量条件下氧的极限扩散电流密度不同使得P110钢的腐蚀速率存在一定程度波动，但其腐蚀速率均相对较高。

The effects of injected oxygen content on the corrosion behavior of P110 steel at 90℃ were studied through corrosion evaluation tests in a simulated gas injection well corrosive environment of high temperature and high dissolved oxygen content, combined with corrosion morphology observation, corrosion product analysis and corrosion rates measured by weight loss method. The results show that P110 steel exhibited serious corrosion scaling under simulated conditions of different injected oxygen content. The corrosion products were mainly iron oxide and CaCO₃, localized corrosion was the main corrosion form. The corrosion process of P110 steel was controlled by dissolved oxygen diffusion rate of cathodic reaction. The corrosion rate of P110 steel fluctuated to a certain extent, but was relatively high because the ultimate diffusion current density of oxygen was different at different injected oxygen content.