The corrosion behavior of X80 steel was investigated using a high-temperature corrosion test case, in order to simulate the corrosion environment of oil pipeline. This pa-per studied the effect of corrosion occurring on the surface of X80 steel in oil-water mixture emulsion with different water content under various temperatures in a dynamic situation.The morphology and composition of the corrosion scales were analyzed by Scanning Electron Mi-croscopy (SEM) and Energy Dispersive Spectrometer (EDS) to study the influence of water content and temperature on the corrosion of X80 steel. The results demonstrated that the corrosion rate of X80 steel was very slow when the water content was low,and the corrosion rate increased significantly when the water content was more than 50%. While in the case of high water content,the corrosion rate of X80 steel increased first and then decreased with in-creasing temperature, and the peak value of corrosion rate at 60 ℃. Combined with the morphology and corrosion rate of corrosion scales,it can be found that the corrosion rate in-creased obviously when the emulsion changed from water-in-oil to oil-in-water.%利用高温腐蚀实验箱模拟输油管道的腐蚀环境，研究X80钢在不同含水率、不同温度下油水混合乳状液动态情况下的腐蚀行为；采用扫描电子显微镜（SEM）和能谱仪（EDS）分析腐蚀产物膜的结构形态与成分，研究原油含水率、温度对X80钢的腐蚀影响规律。实验结果表明，当原油含水率较低时X80钢腐蚀十分缓慢，当含水率大于50%时，腐蚀速率开始大幅增加；在高含水率的情况下，随着温度的增加X80钢腐蚀速率呈现出先增大后减小的趋势，并在60℃时达到腐蚀速率的峰值。结合腐蚀膜的形态和腐蚀速率可以发现，当乳状液从油包水型变成水包油型时，腐蚀速率明显增加。
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