利用电化学测试手段,研究了X80管线钢在模拟土壤介质中的电化学行为。结果表明:土壤含水量达到20%时,X80管线钢在土壤介质中的腐蚀速度最大;当土壤介质pH<7时,以H-还原为主,析氢电位明显比碱性条件下低;外加电流阴极保护和涂层联合应用时,腐蚀电流先增大再减小,最后趋于稳定。 Electrochemical tests were used to study the electrochemical behavior of X80 pipeline steel in simulated soil media. The results show that when the soil moisture content reaches 20%, the corrosion rate of X80 pipeline steel in the soil medium is the highest. When the pH of the soil medium is less than 7, the H-reduction is the main factor, and the hydrogen evolution potential is obviously lower than that in alkaline conditions. When cathodic protection and coating are applied in combination, the corrosion current first increases then decreases and finally stabilizes.